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Journal articles on the topic 'Radar imageur'

Author: Grafiati

Published: 25 May 2024

Last updated: 19 July 2025

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1

Montopoli, M., G. Vulpiani, D. Cimini, E. Picciotti, and F. S. Marzano. "Interpretation of observed microwave signatures from ground dual polarization radar and space multi-frequency radiometer for the 2011 Grímsvötn volcanic eruption." Atmospheric Measurement Techniques 7, no. 2 (2014): 537–52. http://dx.doi.org/10.5194/amt-7-537-2014.

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Abstract. The important role played by ground-based microwave weather radars for the monitoring of volcanic ash clouds has been recently demonstrated. The potential of microwaves from satellite passive and ground-based active sensors to estimate near-source volcanic ash cloud parameters has been also proposed, though with little investigation of their synergy and the role of the radar polarimetry. The goal of this work is to show the potentiality and drawbacks of the X-band dual polarization (DPX) radar measurements through the data acquired during the latest Grímsvötn volcanic eruptions that

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2

Gogineni, S., J. B. Yan, J. Paden, et al. "Bed topography of Jakobshavn Isbræ, Greenland, and Byrd Glacier, Antarctica." Journal of Glaciology 60, no. 223 (2014): 813–33. http://dx.doi.org/10.3189/2014jog14j129.

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AbstractThis paper presents the bed topography of Jakobshavn Isbræ, Greenland, and Byrd Glacier, Antarctica, derived from sounding these glaciers with high-sensitivity radars. To understand the processes causing the speed-up and retreat of outlet glaciers, and to enable the development of next-generation ice-sheet models, we need information on bed topography and basal conditions. To this end, we performed measurements with the progressively improved Multichannel Coherent Radar Depth Sounder/Imager (MCoRDS/I). We processed the data from each antenna-array element using synthetic aperture radar

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3

Guyot, Adrien, Jordan P. Brook, Alain Protat, et al. "Segmentation of polarimetric radar imagery using statistical texture." Atmospheric Measurement Techniques 16, no. 19 (2023): 4571–88. http://dx.doi.org/10.5194/amt-16-4571-2023.

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Abstract. Weather radars are increasingly being used to study the interaction between wildfires and the atmosphere, owing to the enhanced spatio-temporal resolution of radar data compared to conventional measurements, such as satellite imagery and in situ sensing. An important requirement for the continued proliferation of radar data for this application is the automatic identification of fire-generated particle returns (pyrometeors) from a scene containing a diverse range of echo sources, including clear air, ground and sea clutter, and precipitation. The classification of such particles is a

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4

Frame, D. J., B. N. Lawrence, G. J. Fraser, and M. D. Burrage. "A comparison between mesospheric wind measurements made near Christchurch (44°S, 173°E) using the high resolution doppler imager (HRDI) and a medium frequency (MF) radar." Annales Geophysicae 18, no. 5 (2000): 555–65. http://dx.doi.org/10.1007/s00585-000-0555-3.

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Abstract. We report on the comparison of winds measured by a medium frequency (MF) radar near Christchurch, New Zealand, and by the high resolution doppler imager (HRDI). Previous comparisons have demonstrated that there can be significant differences in the winds obtained by the two techniques, and our results are no different. However, these data show relatively good agreement in the meridional direction, but large differences in the zonal direction, where the radar is regularly measuring the zonal wind as too easterly. To do the comparison, overpasses from the satellite must be obtained whe

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5

Hasebe, F., T. Tsuda, T. Nakamura, and M. D. Burrage. "Validation of HRDI MLT winds with meteor radars." Annales Geophysicae 15, no. 9 (1997): 1142–57. http://dx.doi.org/10.1007/s00585-997-1142-7.

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Abstract. A validation study of the mesospheric and lower-thermospheric (MLT) wind velocities measured by the High-Resolution Doppler Imager (HRDI) on board the Upper-Atmosphere Research Satellite (UARS) has been carried out, comparing with observations by meteor radars located at Shigaraki, Japan and Jakarta, Indonesia. The accuracy of the HRDI winds relative to the meteor radars is obtained by a series of simultaneous wind measurements at the time of UARS overpasses. Statistical tests on the difference in the wind vectors observed by HRDI and the meteor radars are applied to determine whethe

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6

Petracca, M., L. P. D’Adderio, F. Porcù, G. Vulpiani, S. Sebastianelli, and S. Puca. "Validation of GPM Dual-Frequency Precipitation Radar (DPR) Rainfall Products over Italy." Journal of Hydrometeorology 19, no. 5 (2018): 907–25. http://dx.doi.org/10.1175/jhm-d-17-0144.1.

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Abstract The Ka–Ku Dual-Frequency Precipitation Radar (DPR) and the Microwave Imager on board the Global Precipitation Measurement (GPM) mission core satellite have been collecting data for more than 3 years, providing precipitation products over the globe, including oceans and remote areas where ground-based precipitation measurements are not available. The main objective of this work is to validate the GPM-DPR products over a key climatic region with complex orography such as the Italian territory. The performances of the DPR precipitation rate products are evaluated over an 18-month period

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7

Jiang, Chong, Lin Ren, Jingsong Yang, Qing Xu, and Jinyuan Dai. "Wind Speed Retrieval Using Global Precipitation Measurement Dual-Frequency Precipitation Radar Ka-Band Data at Low Incidence Angles." Remote Sensing 14, no. 6 (2022): 1454. http://dx.doi.org/10.3390/rs14061454.

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In this study, sea surface wind speed was retrieved using the Global Precipitation Measurement (GPM) dual-frequency precipitation radar (DPR) Ka-band data. In order to establish the Ka-band model at low incidence angles, the dependence of the DPR Ka-band normalized radar cross section (NRCS) on the wind speed, incidence angle, sea surface temperature (SST), significant wave height (SWH), and sea surface current speed (CSPD) was analyzed first. We confirmed that the normalized radar cross section depends on the wind speed, incidence angle, and SST. Second, an empirical model at low incidence an

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8

Hayashi, Yoshiaki, Taichi Tebakari, and Akihiro Hashimoto. "A Comparison Between Global Satellite Mapping of Precipitation Data and High-Resolution Radar Data – A Case Study of Localized Torrential Rainfall over Japan." Journal of Disaster Research 16, no. 4 (2021): 786–93. http://dx.doi.org/10.20965/jdr.2021.p0786.

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This paper presents a case study comparing the latest algorithm version of Global Satellite Mapping of Precipitation (GSMaP) data with C-band and X-band Multi-Parameter (MP) radar as high-resolution rainfall data in terms of localized heavy rainfall events. The study also obliged us to clarify the spatial and temporal resolution of GSMaP data using high-accuracy ground-based radar, and evaluate the performance and reporting frequency of GSMaP satellites. The GSMaP_Gauge_RNL data with less than 70 mm/day of daily rainfall was similar to the data of both radars, but the GSMaP_Gauge_RNL data with

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9

Mityagina, M. I. "Intensity of convective motions in marine atmospheric boundary layer retrieved from ocean surface radar imagery." Nonlinear Processes in Geophysics 13, no. 3 (2006): 303–8. http://dx.doi.org/10.5194/npg-13-303-2006.

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Abstract. The paper focuses on the occurrence and development of coherent structures observed in the atmosphere above ocean under natural conditions. Microwave imaging radars are suggested as data take instruments. The phenomena of marine atmospheric cells and rolls onset, horizontal planform, aspect ratio and scaling phenomena are examined. Convective patterns manifested in radar images and information derived on the intensity of atmospheric motion are discussed.

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10

Lee, Yoonjin, Christian D. Kummerow, and Milija Zupanski. "Latent heating profiles from GOES-16 and its impacts on precipitation forecasts." Atmospheric Measurement Techniques 15, no. 23 (2022): 7119–36. http://dx.doi.org/10.5194/amt-15-7119-2022.

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Abstract. Latent heating (LH) is an important factor in both weather forecasting and climate analysis, being the essential factor affecting both the intensity and structure of convective systems. Yet, inferring LH rates from our current observing systems is challenging at best. For climate studies, LH has been retrieved from the precipitation radar on the Tropical Rainfall Measuring Mission (TRMM) using model simulations in a lookup table (LUT) that relates instantaneous radar data to corresponding heating profiles. These radars, first on TRMM and then the Global Precipitation Measurement Miss

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Wingo, Stephanie M., Walter A. Petersen, Patrick N. Gatlin, Charanjit S. Pabla, David A. Marks, and David B. Wolff. "The System for Integrating Multiplatform Data to Build the Atmospheric Column (SIMBA) Precipitation Observation Fusion Framework." Journal of Atmospheric and Oceanic Technology 35, no. 7 (2018): 1353–74. http://dx.doi.org/10.1175/jtech-d-17-0187.1.

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AbstractResearchers now have the benefit of an unprecedented suite of space- and ground-based sensors that provide multidimensional and multiparameter precipitation information. Motivated by NASA’s Global Precipitation Measurement (GPM) mission and ground validation objectives, the System for Integrating Multiplatform Data to Build the Atmospheric Column (SIMBA) has been developed as a unique multisensor precipitation data fusion tool to unify field observations recorded in a variety of formats and coordinate systems into a common reference frame. Through platform-specific modules, SIMBA proce

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12

Costanzo, Sandra, Giuseppe Di Massa, Antonio Costanzo, et al. "Multimode/Multifrequency Low Frequency Airborne Radar Design." Journal of Electrical and Computer Engineering 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/857530.

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This work deals with the design of multimode/multifrequency airborne radar suitable for imaging and subsurface sounding. The system operates at relatively low frequencies in the band ranging from VHF to UHF. It is able to work in two different modalities: (i) nadir-looking sounder in the VHF band (163 MHz) and (ii) side-looking imager (SAR) in the UHF band with two channels at 450 MHz and 860 MHz. The radar has been completely designed by CO.Ri.S.T.A. for what concerns the RF and the electronic aspect, and by the University of Calabria for what concerns the design, realization, and test of SAR

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13

Holt, Benjamin, and F. D. Carsey. "The Separation of Sea-Ice Types in Radar Imagery (Abstract)." Annals of Glaciology 9 (1987): 247. http://dx.doi.org/10.3189/s0260305500000860.

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The ability to distinguish the several major types of sea ice with active radar instruments has been well studied in recent years. The separation of sea-ice types by radar results principally from variations in radar back-scatter due to characteristic differences of these ice types in surface morphology and brine content. When sea ice is viewed with an active radar at angles greater than about 20° from nadir, undeformed ice reflects radar waves and results in a low return, while ridges, hummocks, and small-scale surface features scatter the radar waves and produce a high return. The presence o

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Holt, Benjamin, and F. D. Carsey. "The Separation of Sea-Ice Types in Radar Imagery (Abstract)." Annals of Glaciology 9 (1987): 247. http://dx.doi.org/10.1017/s0260305500000860.

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The ability to distinguish the several major types of sea ice with active radar instruments has been well studied in recent years. The separation of sea-ice types by radar results principally from variations in radar back-scatter due to characteristic differences of these ice types in surface morphology and brine content. When sea ice is viewed with an active radar at angles greater than about 20° from nadir, undeformed ice reflects radar waves and results in a low return, while ridges, hummocks, and small-scale surface features scatter the radar waves and produce a high return. The presence o

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15

Lee, Yoonjin, Christian D. Kummerow, and Milija Zupanski. "A simplified method for the detection of convection using high-resolution imagery from GOES-16." Atmospheric Measurement Techniques 14, no. 5 (2021): 3755–71. http://dx.doi.org/10.5194/amt-14-3755-2021.

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Abstract. The ability to detect convective regions and to add latent heating to drive convection is one of the most important additions to short-term forecast models such as National Oceanic and Atmospheric Administration's (NOAA's) High-Resolution Rapid Refresh (HRRR) model. Since radars are most directly related to precipitation and are available in high temporal resolution, their data are often used for both detecting convection and estimating latent heating. However, radar data are limited to land areas, largely in developed nations, and early convection is not detectable from radars until

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Sato, Kaori, Hajime Okamoto, Tomoaki Nishizawa, et al. "JAXA Level 2 cloud and precipitation microphysics retrievals based on EarthCARE radar, lidar, and imager: the CPR_CLP, AC_CLP, and ACM_CLP products." Atmospheric Measurement Techniques 18, no. 5 (2025): 1325–38. https://doi.org/10.5194/amt-18-1325-2025.

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Abstract. This study introduces the primary products and features of active-sensor-based Level 2 cloud microphysics products of the Japanese Aerospace Exploration Agency (JAXA; i.e., the cloud radar standalone cloud product (CPR_CLP), the radar–lidar synergy cloud product (AC_CLP), and the radar–lidar–imager cloud product (ACM_CLP)). Combined with the 94 GHz Doppler cloud profiling radar (CPR), 355 nm high-spectral-resolution lidar (Atmospheric Lidar, ATLID) and Multi-Spectral Imager (MSI), these products provide a detailed view of the transitions of cloud particle categories and their size di

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Montopoli, M., G. Vulpiani, D. Cimini, E. Picciotti, and F. S. Marzano. "Interpretation of observed microwave signatures from ground dual polarization radar and space multi frequency radiometer for the 2011 Grímsvötn volcanic eruption." Atmospheric Measurement Techniques Discussions 6, no. 4 (2013): 6215–48. http://dx.doi.org/10.5194/amtd-6-6215-2013.

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Abstract. The important role played by ground-based microwave weather radars for the monitoring of volcanic ash clouds has been recently demonstrated. The potential of microwaves from satellite passive and ground-based active sensors to estimate near-source volcanic ash cloud parameters has been also proposed, though with little investigation of their synergy and the role of the radar polarimetry. The goal of this work is to show the potentiality and drawbacks of the X-band Dual Polarization radar measurements (DPX) through the data acquired during the latest Grímsvötn volcanic eruptions that

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18

Shige, Shoichi, Satoshi Kida, Hiroki Ashiwake, Takuji Kubota, and Kazumasa Aonashi. "Improvement of TMI Rain Retrievals in Mountainous Areas." Journal of Applied Meteorology and Climatology 52, no. 1 (2013): 242–54. http://dx.doi.org/10.1175/jamc-d-12-074.1.

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AbstractHeavy rainfall associated with shallow orographic rainfall systems has been underestimated by passive microwave radiometer algorithms owing to weak ice scattering signatures. The authors improve the performance of estimates made using a passive microwave radiometer algorithm, the Global Satellite Mapping of Precipitation (GSMaP) algorithm, from data obtained by the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) for orographic heavy rainfall. An orographic/nonorographic rainfall classification scheme is developed on the basis of orographically forced upward vertical m

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19

Lee, Kangjin, Seong-Gyeong Jeon, Seok-Yong Seong, and Ki-mook Kang. "Technology Trend in Synthetic Aperture Radar (SAR) Imagery Analysis Tools." Journal of Space Technology and Applications 1, no. 2 (2021): 268–81. http://dx.doi.org/10.52912/jsta.2021.1.2.268.

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Hysell, D. L., M. F. Larsen, and Q. H. Zhou. "Common volume coherent and incoherent scatter radar observations of mid-latitude sporadic E-layers and QP echoes." Annales Geophysicae 22, no. 9 (2004): 3277–90. http://dx.doi.org/10.5194/angeo-22-3277-2004.

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Abstract. Common-volume observations of sporadic E-layers made on 14-15 June 2002 with the Arecibo incoherent scatter radar and a 30MHz coherent scatter radar imager located on St. Croix are described. Operating in dual-beam mode, the Arecibo radar detected a slowly descending sporadic E-layer accompanied by a series of dense E-region plasma clouds at a time when the coherent scatter radar was detecting quasi-periodic (QP) echoes. Using coherent radar imaging, we collocate the sources of the coherent scatter with the plasma clouds observed by Arecibo. In addition to patchy, polarized scatterin

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Tanaka, Yoshimasa, Yasunobu Ogawa, Akira Kadokura, et al. "Application of generalized aurora computed tomography to the EISCAT_3D project." Annales Geophysicae 42, no. 1 (2024): 179–90. http://dx.doi.org/10.5194/angeo-42-179-2024.

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Abstract. EISCAT_3D is a project to build a multi-site phased-array incoherent scatter radar system in northern Fenno-Scandinavia. We demonstrate via numerical simulation how useful monochromatic images taken by a multi-point imager network are for auroral research in the EISCAT_3D project. We apply the generalized aurora computed tomography (G-ACT) method to modelled observational data from real instruments, such as the Auroral Large Imaging System (ALIS) and the EISCAT_3D radar. G-ACT is a method for reconstructing the three-dimensional (3D) distribution of auroral emissions and ionospheric

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Trofymchuk, Oleksandr M., Oleksandr V. Hordiienko, Yevheniia S. Anpilova, and Yevhenii O. Yakovliev. "Monitoring vertical landslides in the Solotvyno aglomeration using Sentinel-1 satellite imagery." Environmental safety and natural resources 50, no. 2 (2024): 102–14. http://dx.doi.org/10.32347/2411-4049.2024.2.102-114.

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The Synthetic Aperture Radar (SAR) equipped Sentinel-1 satellites are a valuable source of Earth observation data. They provide a spatial resolution of 10 to 20 metres, depending on the imaging mode. Unlike optical sensors, SAR radars can operate day and night, in cloudy weather and in the absence of sunlight. This makes them a reliable source of data in all conditions. Google Earth Engine (GEE), in turn, includes dual-polarisation Sentinel-1 data in its large and up-to-date archive. Since GEE does not have a single lookup complex (SLC) that allows standard methods to investigate changes in te

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Pitkänen, T., A. T. Aikio, A. Kozlovsky, and O. Amm. "Reconnection electric field estimates and dynamics of high-latitude boundaries during a substorm." Annales Geophysicae 27, no. 5 (2009): 2157–71. http://dx.doi.org/10.5194/angeo-27-2157-2009.

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Abstract. The dynamics of the polar cap and the auroral oval are examined in the evening sector during a substorm period on 25 November 2000 by using measurements of the EISCAT incoherent scatter radars, the north-south chain of the MIRACLE magnetometer network, and the Polar UV Imager. The location of the polar cap boundary (PCB) is estimated from electron temperature measurements by the mainland low-elevation EISCAT VHF radar and the 42 m antenna of the EISCAT Svalbard radar. A comparison to the poleward auroral emission (PAE) boundary by the Polar UV Imager shows that in this event the PAE

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Stapleton, N. R. "Ship wakes in radar imagery." International Journal of Remote Sensing 18, no. 6 (1997): 1381–86. http://dx.doi.org/10.1080/014311697218494.

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Abidin Ismail, Z. "Radar Imagery Monitored Crop Identification." IFAC Proceedings Volumes 34, no. 11 (2001): 303–5. http://dx.doi.org/10.1016/s1474-6670(17)34153-8.

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26

Gatlin, Patrick N., Walter A. Petersen, Jason L. Pippitt, Todd A. Berendes, David B. Wolff, and Ali Tokay. "The GPM Validation Network and Evaluation of Satellite-Based Retrievals of the Rain Drop Size Distribution." Atmosphere 11, no. 9 (2020): 1010. http://dx.doi.org/10.3390/atmos11091010.

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A unique capability of the Global Precipitation Measurement (GPM) mission is its ability to better estimate the raindrop size distribution (DSD) on a global scale. To validate the GPM DSD retrievals, a network of more than 100 ground-based polarimetric radars from across the globe are utilized within the broader context of the GPM Validation Network (VN) processing architecture. The GPM VN ensures quality controlled dual-polarimetric radar moments for use in providing reference estimates of the DSD. The VN DSD estimates are carefully geometrically matched with the GPM core satellite measuremen

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Lee, Yoonjin, Christian D. Kummerow, and Imme Ebert-Uphoff. "Applying machine learning methods to detect convection using Geostationary Operational Environmental Satellite-16 (GOES-16) advanced baseline imager (ABI) data." Atmospheric Measurement Techniques 14, no. 4 (2021): 2699–716. http://dx.doi.org/10.5194/amt-14-2699-2021.

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Abstract. An ability to accurately detect convective regions is essential for initializing models for short-term precipitation forecasts. Radar data are commonly used to detect convection, but radars that provide high-temporal-resolution data are mostly available over land, and the quality of the data tends to degrade over mountainous regions. On the other hand, geostationary satellite data are available nearly anywhere and in near-real time. Current operational geostationary satellites, the Geostationary Operational Environmental Satellite-16 (GOES-16) and Satellite-17, provide high-spatial-

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Danilicheva, O. A., S. A. Ermakov, and I. A. Kapustin. "Retrieval of surface currents from sequential satellite radar images." Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa 17, no. 6 (2020): 93–96. http://dx.doi.org/10.21046/2070-7401-2020-17-6-93-96.

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Cheng, Yi-Lin, Wen-Hsiang Yeh, and Yu-Ping Liao. "The Implementation of a Gesture Recognition System with a Millimeter Wave and Thermal Imager." Sensors 24, no. 2 (2024): 581. http://dx.doi.org/10.3390/s24020581.

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During the COVID-19 pandemic, the number of cases continued to rise. As a result, there was a growing demand for alternative control methods to traditional buttons or touch screens. However, most current gesture recognition technologies rely on machine vision methods. However, this method can lead to suboptimal recognition results, especially in situations where the camera is operating in low-light conditions or encounters complex backgrounds. This study introduces an innovative gesture recognition system for large movements that uses a combination of millimeter wave radar and a thermal imager

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Lin, Xin, and Arthur Y. Hou. "Evaluation of Coincident Passive Microwave Rainfall Estimates Using TRMM PR and Ground Measurements as References." Journal of Applied Meteorology and Climatology 47, no. 12 (2008): 3170–87. http://dx.doi.org/10.1175/2008jamc1893.1.

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Abstract This study compares instantaneous rainfall estimates provided by the current generation of retrieval algorithms for passive microwave sensors using retrievals from the Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) and merged surface radar and gauge measurements over the continental United States as references. The goal is to quantitatively assess surface rain retrievals from cross-track scanning microwave humidity sounders relative to those from conically scanning microwave imagers. The passive microwave sensors included in the study are three operational sounder

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Agram, Piyush S., Michael S. Warren, Scott A. Arko, and Matthew T. Calef. "Radiometric Terrain Flattening of Geocoded Stacks of SAR Imagery." Remote Sensing 15, no. 7 (2023): 1932. http://dx.doi.org/10.3390/rs15071932.

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We have described an efficient approach to radiometrically flatten geocoded stacks of calibrated synthetic aperture radar (SAR) data for terrain-related effects. We have used simulation to demonstrate that, for the Sentinel-1 mission, one static radiometric terrain-flattening factor derived from actual SAR imaging metadata per imaging geometry is sufficient for flattening interferometrically compliant stacks of SAR data. We have quantified the loss of precision due to the application of static flattening factors, and show that these are well below the stated requirements of change-detection al

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Esmaeilzade, M., J. Amini, and S. Zakeri. "GEOREFERENCING ON SYNTHETIC APERTURE RADAR IMAGERY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1-W5 (December 11, 2015): 179–84. http://dx.doi.org/10.5194/isprsarchives-xl-1-w5-179-2015.

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Due to the SAR<sup>1</sup> geometry imaging, SAR images include geometric distortions that would be erroneous image information and the images should be geometrically calibrated. As the radar systems are side looking, geometric distortion such as shadow, foreshortening and layover are occurred. To compensate these geometric distortions, information about sensor position, imaging geometry and target altitude from ellipsoid should be available. In this paper, a method for geometric calibration of SAR images is proposed. The method uses Range-Doppler equations. In this method, for the

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Chen, Sei-Wang, and Anil K. Jain. "Object extraction from laser radar imagery." Pattern Recognition 24, no. 6 (1991): 587–600. http://dx.doi.org/10.1016/0031-3203(91)90024-y.

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Prikryl, P., J. W. MacDougall, I. F. Grant, D. P. Steele, G. J. Sofko, and R. A. Greenwald. "Observations of polar patches generated by solar wind Alfvén wave coupling to the dayside magnetosphere." Annales Geophysicae 17, no. 4 (1999): 463–89. http://dx.doi.org/10.1007/s00585-999-0463-0.

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Abstract. A long series of polar patches was observed by ionosondes and an all-sky imager during a disturbed period (Kp = 7- and IMF Bz < 0). The ionosondes measured electron densities of up to 9 × 1011 m-3 in the patch center, an increase above the density minimum between patches by a factor of \\sim4.5. Bands of F-region irregularities generated at the equatorward edge of the patches were tracked by HF radars. The backscatter bands were swept northward and eastward across the polar cap in a fan-like formation as the afternoon convection cell expanded due to the IMF By > 0. Near the nor

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Zhang, Yuansheng, Dongjie Cao, Jing Yang, et al. "A Parallax Shift Effect Correction Based on Cloud Top Height for FY-4A Lightning Mapping Imager (LMI)." Remote Sensing 15, no. 19 (2023): 4856. http://dx.doi.org/10.3390/rs15194856.

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The Lightning Mapping Imager (LMI) onboard the Fengyun-4A (FY-4A) satellite is the first independently developed satellite-borne lightning imager in China. It enables continuous lightning detection in China and surrounding areas, regardless of weather conditions. The FY-4A LMI uses a Charge-Coupled Device (CCD) array for lightning detection, and the accuracy of lightning positioning is influenced by cloud top height (CTH). In this study, we proposed an ellipsoid CTH parallax correction (ECPC) model for lightning positioning applicable to FY-4A LMI. The model utilizes CTH data from the Advanced

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Matthee, Retha, John R. Mecikalski, Lawrence D. Carey, and Phillip M. Bitzer. "Quantitative Differences between Lightning and Nonlightning Convective Rainfall Events as Observed with Polarimetric Radar and MSG Satellite Data." Monthly Weather Review 142, no. 10 (2014): 3651–65. http://dx.doi.org/10.1175/mwr-d-14-00047.1.

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Abstract To increase understanding of the relationships between lightning and nonlightning convective storms, lightning observations from the National Aeronautics and Space Administration (NASA) African Monsoon Multidisciplinary Analyses (NAMMA) campaign were analyzed with Meteosat Second Generation (MSG) geostationary satellite and S-band NASA Polarimetric Doppler Weather Radar (NPOL) data. The study’s goal was to analyze the time evolution of infrared satellite fields and ground-based polarimetric radar during NAMMA to quantify relationships between satellite and radar observations for light

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Marzano, F. S., S. Mori, M. Chini, et al. "Potential of high-resolution detection and retrieval of precipitation fields from X-band spaceborne synthetic aperture radar over land." Hydrology and Earth System Sciences 15, no. 3 (2011): 859–75. http://dx.doi.org/10.5194/hess-15-859-2011.

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Abstract. X-band Synthetic Aperture Radars (X-SARs), able to image the Earth's surface at metric resolution, may provide a unique opportunity to measure rainfall over land with spatial resolution of about few hundred meters, due to the atmospheric moving-target degradation effects. This capability has become very appealing due to the recent launch of several X-SAR satellites, even though several remote sensing issues are still open. This work is devoted to: (i) explore the potential of X-band high-resolution detection and retrieval of rainfall fields from space using X-SAR signal backscatterin

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Marzano, F. S., S. Mori, M. Chini, et al. "Potential of high-resolution detection and retrieval of precipitation fields from X-band spaceborne Synthetic Aperture Radar over land." Hydrology and Earth System Sciences Discussions 7, no. 5 (2010): 7451–84. http://dx.doi.org/10.5194/hessd-7-7451-2010.

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Abstract. X-band Synthetic Aperture Radars (X-SARs), able to image the Earth's surface at metric resolution, may provide a unique opportunity to measure rainfall over land with spatial resolution of about few hundred meters, due to the atmospheric moving-target degradation effects. This capability has become very appealing due to the recent launch of several X-SAR satellites, even though several remote sensing issues are still open. This work is devoted to: (i) explore the potential of X-band high-resolution detection and retrieval of rainfall fields from space using X-SAR signal backscatterin

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Gordon, Samantha, and Graham Brooker. "Using Schlieren Imaging and a Radar Acoustic Sounding System for the Detection of Close-in Air Turbulence." Sensors 23, no. 19 (2023): 8255. http://dx.doi.org/10.3390/s23198255.

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This paper presents a novel sensor for the detection and characterization of regions of air turbulence. As part of the ground truth process, it consists of a combined Schlieren imager and a Radar Acoustic Sounding System (RASS) to produce dual-modality “images” of air movement within the measurement volume. The ultrasound-modulated Schlieren imager consists of a strobed point light source, parabolic mirror, light block, and camera, which are controlled by two laptops. It provides a fine-scale projection of the acoustic pulse-modulated air turbulence through the measurement volume. The narrow b

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Veillette, Mark S., Eric P. Hassey, Christopher J. Mattioli, Haig Iskenderian, and Patrick M. Lamey. "Creating Synthetic Radar Imagery Using Convolutional Neural Networks." Journal of Atmospheric and Oceanic Technology 35, no. 12 (2018): 2323–38. http://dx.doi.org/10.1175/jtech-d-18-0010.1.

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AbstractIn this work deep convolutional neural networks (CNNs) are shown to be an effective model for fusing heterogeneous geospatial data to create radar-like analyses of precipitation intensity (i.e., synthetic radar). The CNN trained in this work has a directed acyclic graph (DAG) structure that takes inputs from multiple data sources with varying spatial resolutions. These data sources include geostationary satellite (1-km visible and four 4-km infrared bands), lightning flash density from Earth Network’s Total Lightning Network, and numerical model data from NOAA’s 13-km Rapid Refresh mod

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Kolobrodov, V. H. "Computer Modelling Technologies of Optical System of Polarizing Thermal Imager." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 83 (December 30, 2020): 69–74. https://doi.org/10.20535/radap.2020.83.69-74.

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The energetic resolution is a main parameter of any thermal imager depending on the transmittance of its optical system. The optical system of a polarizing thermal imager (PTI) consists of a polarizer, a phase shifter and a lens arranged in series on the optical axis. This paper proposes a method for calculation of the energic transmittance of the PTI’s optical system for partially polarized radiation as a function of angular orientation of the polarizer and the phase retarder. The physical-mathematical model of transformation of partially polarized radiation within the optical system which de

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Aruliah, A. L., E. M. Griffin, H. C. I. Yiu, I. McWhirter, and A. Charalambous. "SCANDI – an all-sky Doppler imager for studies of thermospheric spatial structure." Annales Geophysicae 28, no. 2 (2010): 549–67. http://dx.doi.org/10.5194/angeo-28-549-2010.

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Abstract. A new all-sky Fabry-Perot Interferometer called the Scanning Doppler Imager (SCANDI) was built and installed at Longyearbyen in December 2006. Observations have been made of the Doppler shifts and Doppler broadening of the 630 nm airglow and aurora, from which upper thermospheric winds and temperatures are calculated. SCANDI allows measurements over a field-of-view (FOV) with a horizontal radius of nearly 600 km for observations at an altitude of 250 km using a time resolution of 8 min. The instrument provides the ability to observe thermospheric spatial structure within a FOV which

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Kim, Ji-Hye, Mi-Lim Ou, Jun-Dong Park, Kenneth R. Morris, Mathew R. Schwaller, and David B. Wolff. "Global Precipitation Measurement (GPM) Ground Validation (GV) Prototype in the Korean Peninsula." Journal of Atmospheric and Oceanic Technology 31, no. 9 (2014): 1902–21. http://dx.doi.org/10.1175/jtech-d-13-00193.1.

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Abstract Since 2009, the Korea Meteorological Administration (KMA) has participated in ground validation (GV) projects through international partnerships within the framework of the Global Precipitation Measurement (GPM) Mission. The goal of this work is to assess the reliability of ground-based measurements in the Korean Peninsula as a means for validating precipitation products retrieved from satellite microwave sensors, with an emphasis on East Asian precipitation. KMA has a well-developed operational weather service infrastructure composed of meteorological radars, a dense rain gauge netwo

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Hollaus, Markus, and Mariette Vreugdenhil. "Radar Satellite Imagery for Detecting Bark Beetle Outbreaks in Forests." Current Forestry Reports 5, no. 4 (2019): 240–50. http://dx.doi.org/10.1007/s40725-019-00098-z.

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Abstract Purpose of Review The overall objective of this paper is to review the state of knowledge on the application of radar data for detecting bark beetle attacks in forests. Due to the increased availability of high spatial and temporal resolution radar data (e.g. Sentinel-1 (S1)), the question is how this time series data can support operational forest management with respect to forest insect damage prevention. Furthermore, available radar systems will be listed and their potential for detecting bark beetle attacks will be discussed. To increase the understanding of the potential of radar

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Kataoka, R., H. Fukunishi, K. Hosokawa, et al. "Transient production of F-region irregularities associated with TCV passage." Annales Geophysicae 21, no. 7 (2003): 1531–41. http://dx.doi.org/10.5194/angeo-21-1531-2003.

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Abstract. Transient production of F-region plasma irregularities due to traveling convection vortices (TCVs) was investigated using the Super Dual Auroral Radar Network (SuperDARN) combined with ground magnetometer networks and the POLAR ultraviolet imager. We selected two large-amplitude (100–200 nT) TCV events that occurred on 22 May 1996 and 24 July 1996. It is found that the TCV-associated HF backscatter arises in blobs with spatial scale of a few hundreds km. They traveled following tailward bulk motion of the TCV across the three fields-of-view of the SuperDARN HF radars in the prenoon s

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Leblon, Brigitte. "Mapping forest clearcuts using radar digital imagery: A review of the Canadian experience." Forestry Chronicle 75, no. 4 (1999): 675–84. http://dx.doi.org/10.5558/tfc75675-4.

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Annual clearcut mapping is currently done in Canada mainly from photo-interpretation of aerial photographs. An advantageous alternative would use digital imagery. Optical imagery acquisition depends on weather and illumination conditions, but not radar images. This paper documents the state of practice in Canada in the use of radar digital images for clearcut mapping, with regards to the type of images used, to the influence of environmental conditions, the band, polarization, time of the year, and incidence angles, as well as to the mapping accuracy. Synergism between optical and radar images

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Ricciardelli, E., D. Cimini, F. Di Paola, F. Romano, and M. Viggiano. "A statistical approach for rain class evaluation using Meteosat Second Generation-Spinning Enhanced Visible and InfraRed Imager observations." Hydrology and Earth System Sciences Discussions 10, no. 11 (2013): 13671–706. http://dx.doi.org/10.5194/hessd-10-13671-2013.

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Abstract. Precipitation measurements are essential for short term hydrological and long term climate studies. Operational networks of rain gauges and weather radars provide fairly accurate rain rate measurements, but they leave large areas uncovered. Because of this, satellite remote sensing is a useful tool for the detection and characterization of the raining areas in regions where this information remains missing. This study exploits the Meteosat Second Generation – Spinning Enhanced Visible and Infrared Imager (MSG-SEVIRI) observations to evaluate the rain class at high spatial and tempora

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Kulie, Mark S., Claire Pettersen, Aronne J. Merrelli, et al. "Snowfall in the Northern Great Lakes: Lessons Learned from a Multisensor Observatory." Bulletin of the American Meteorological Society 102, no. 7 (2021): E1317—E1339. http://dx.doi.org/10.1175/bams-d-19-0128.1.

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AbstractA multisensor snowfall observational suite has been deployed at the Marquette, Michigan, National Weather Service Weather Forecast Office (KMQT) since 2014. Micro Rain Radar (MRR; profiling radar), Precipitation Imaging Package (PIP; snow particle imager), and ancillary ground-based meteorological observations illustrate the unique capabilities of these combined instruments to document radar and concomitant microphysical properties associated with northern Great Lakes snowfall regimes. Lake-effect, lake-orographic, and transition event case studies are presented that illustrate the var

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Bedka, Kristopher, Elisa M. Murillo, Cameron R. Homeyer, Benjamin Scarino, and Haiden Mersiovsky. "The Above-Anvil Cirrus Plume: An Important Severe Weather Indicator in Visible and Infrared Satellite Imagery." Weather and Forecasting 33, no. 5 (2018): 1159–81. http://dx.doi.org/10.1175/waf-d-18-0040.1.

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Abstract Intense tropopause-penetrating updrafts and gravity wave breaking generate cirrus plumes that reside above the primary anvil. These “above anvil cirrus plumes” (AACPs) exhibit unique temperature and reflectance patterns in satellite imagery, best recognized within 1-min “super rapid scan” observations. AACPs are often evident during severe weather outbreaks and, due to their importance, have been studied for 35+ years. Despite this research, there is uncertainty regarding why some storms produce AACPs but other nearby storms do not, exactly how severe are storms with AACPs, and how AA

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Cintineo, Rebecca M., Jason A. Otkin, Thomas A. Jones, Steven Koch, and David J. Stensrud. "Assimilation of Synthetic GOES-R ABI Infrared Brightness Temperatures and WSR-88D Radar Observations in a High-Resolution OSSE." Monthly Weather Review 144, no. 9 (2016): 3159–80. http://dx.doi.org/10.1175/mwr-d-15-0366.1.

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This study uses an observing system simulation experiment to explore the impact of assimilating GOES-R Advanced Baseline Imager (ABI) 6.95-μm brightness temperatures and Weather Surveillance Radar-1988 Doppler (WSR-88D) reflectivity and radial velocity observations in an ensemble data assimilation system. A high-resolution truth simulation was used to create synthetic radar and satellite observations of a severe weather event that occurred across the U.S. central plains on 4–5 June 2005. The experiment employs the Weather Research and Forecasting Model at 4-km horizontal grid spacing and the e

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