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Journal articles on the topic 'INDIAN SATELLITES'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Nafieva, E. N., and A. V. Grechishchev. "SPACE RADAR SYSTEMS OF EARTH MONITORING." ECOLOGY ECONOMY INFORMATICS. GEOINFORMATION TECHNOLOGIES AND SPACE MONITORING 2, no. 5 (2020): 89–95. http://dx.doi.org/10.23885/2500-123x-2020-2-5-89-95.

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This article explores the relevance of radar sensing methods. The principles of its operation and the advantages of use are considered: the independence of obtaining images from weather conditions and the time of day, the possibility of wide viewing at long ranges with high resolution and the flexibility of controlling and changing radar parameters, which allows you to vary the position and size of the viewing area, resolution and forms of information. In addition, the main satellite radar systems were considered: satellites of the European Space Agency ERS-1,2 and ENVISAT; Canadian satellites

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Soma P. "IRNSS/NavIC: Indigenous Indian Satellite Navigation Programme." ACS Journal for Science and Engineering 1, no. 1 (2021): 11–16. http://dx.doi.org/10.34293/acsjse.v1i1.2.

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India has a vibrant space programme, and over years has successfully operationalized communication and remote sensing satellites for the benefit of the country. In order to achieve self-reliance in satellite-based navigation service over Indian region, Indian Space Research Organization (ISRO) has initiated the NavIC (Navigation with Indian Constellation) Programme. NavIC is developed to give PNT (Position, Navigation and Time) services for users over Indian region and its neighbourhood with positional accuracy of 20 m and 10 Nano seconds time accuracy. It provides navigation services to India

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Manikiam, Balakrishnan. "Applications of IRS and INSAT Data with Specific Case Studies." Mapana - Journal of Sciences 13, no. 1 (2017): 85–99. http://dx.doi.org/10.12723/mjs.28.6.

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Indian satellite programme has over the past three decades achieved operational capability in the area of remote sensing. The Indian Remote Sensing (IRS) satellites are developed towards providing data for natural resources survey and management. Techniques have been developed to retrieve several parameters related to land, ocean and atmosphere. Since the launch of IRS 1A in early 80’s, the technology has improved to achieve satellite imagery with resolution of 1 meter. The Indian National satellite (INSAT) system is made up of geostationary satellites towards monitoring and study of weather o

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Agrawal, P. C. "Space Astronomy in India." Publications of the Astronomical Society of Australia 9, no. 2 (1991): 229–33. http://dx.doi.org/10.1017/s1323358000023936.

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AbstractAstronomical observations from space-borne instruments are carried out in India in the areas of infrared, X-ray and gamma-ray astronomy. This paper briefly describes the facilities available in India for conducting experiments in space astronomy using balloons, rockets and satellites. It briefly reviews the important results obtained by Indian astronomers from observations made in India with the balloon, rocket and satellite experiments. The present status of research in different disciplines of space astronomy is discussed.

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Chandrashekar, M. G., V. Jayaramn, C. B. S. Dutt, and B. Manikiam. "Earth Observation System Plans of India." International Astronomical Union Colloquium 123 (1990): 531. http://dx.doi.org/10.1017/s0252921100077617.

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AbstractOperational methodologies are available to retrieve several parameters related to the land, air and oceans from satellite data which is capable of providing well calibrated data/observations over large areas giving a synoptic view on a repetitive and reliable basis. The capability of satellites to provide data in various spectral, spatial and temporal scales is of great advantage in studying the dynamic aspects of earth atmosphere system. The present day capabilities of satellites include spatial resolutions ranging from 10 m and above and repetition of a few hours (geosynchronous Sate

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Balakrishnan Manikiam, Kamsali Nagaraja. "Climate Change Analysis using Satellite Data." Mapana - Journal of Sciences 14, no. 1 (2017): 25–39. http://dx.doi.org/10.12723/mjs.32.4.

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Recent times have witnessed increasing impact of industrialization and urban growth on environment. In addition, the potential climate changes and possible adverse impacts on the economy and society at large are causing concern. In India, one of the major concerns is the variability of monsoon rainfall and effects on agriculture and water management. The various parameters associated with environment and climate change need to be monitored and analyzed. The effects of global warming on the Indian subcontinent vary from the submergence of low-lying islands, frequent flooding, coastal degradatio

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Rama Rao, P. V. S., K. Niranjan, D. S. V. V. D. Prasad, S. Gopi Krishna, and G. Uma. "On the validity of the ionospheric pierce point (IPP) altitude of 350 km in the Indian equatorial and low-latitude sector." Annales Geophysicae 24, no. 8 (2006): 2159–68. http://dx.doi.org/10.5194/angeo-24-2159-2006.

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Abstract. The GPS data provides an effective way to estimate the total electron content (TEC) from the differential time delay of L1 and L2 transmissions from the GPS. The spacing of the constellation of GPS satellites in orbits are such that a minimum of four GPS satellites are observed at any given point in time from any location on the ground. Since these satellites are in different parts of the sky and the electron content in the ionosphere varies both spatially and temporally, the ionospheric pierce point (IPP) altitude or the assumed altitude of the centroid of mass of the ionosphere pla

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Ramanathan, T. V., and Radhika A. Chipade. "Statistical Orbit Determination Algorithm for Satellites in Indian Navigation Constellation (NavIC): Towards Extended Ephemeris Technology for NavIC Receiver." Artificial Satellites 55, no. 2 (2020): 29–40. http://dx.doi.org/10.2478/arsa-2020-0003.

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AbstractEphemerides are essential for the satellite positioning in Global Navigation Satellite Systems (GNSS) user receivers. Acquisition of navigation data and ephemeris parameters are difficult in remote areas as well as in challenging environments. Statistical orbit determination techniques can help to predict the orbital parameters in the absence of navigation data. The present study is a first step towards the solution for generating orbital parameters and predicting the satellite positions in the absence of navigation data for satellites in NavIC constellation. The orbit determination al

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Sathish, P., and N. Alivelu Manga. "Investigation of Doppler Collision Effects in Kinematic Conditions and its Mitigation for NavIC System." Alinteri Journal of Agriculture Sciences 36, no. 1 (2021): 541–49. http://dx.doi.org/10.47059/alinteri/v36i1/ajas21077.

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NavIC (Navigation with Indian Constellation) constellation consists of four geosynchronous and three geostationary satellites and it is developed by ISRO, India. It provides position, velocity and timing services. Doppler Collision (DC) is a phenomenon where tracking errors are introduced in the measurements due to cross-correlation between the satellites. If relative doppler between satellites is less than the code loop bandwidth, then DC occurs. In this paper, to analyze DC impact on NavIC, the Doppler shift of each GEO satellite is calculated, the most effected GEO satellite pair is identif

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Kumar, Vinod, Hari B. Hablani, and R. Pandiyan. "Kinematic Navigation of Geostationary Satellites Formation Using Indian Regional Navigation Satellites Observables." Journal of Guidance, Control, and Dynamics 38, no. 9 (2015): 1856–64. http://dx.doi.org/10.2514/1.g000864.

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Venkat Ratnam, Madineni, Alladi Hemanth Kumar, and Achuthan Jayaraman. "Validation of INSAT-3D sounder data with in situ measurements and other similar satellite observations over India." Atmospheric Measurement Techniques 9, no. 12 (2016): 5735–45. http://dx.doi.org/10.5194/amt-9-5735-2016.

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Abstract. To date, several satellites measurements are available which can provide profiles of temperature and water vapour with reasonable accuracies. However, the temporal resolution has remained poor, particularly over the tropics, as most of them are polar orbiting. At this juncture, the launch of INSAT-3D (Indian National Satellite System) by the Indian Space Research Organization (ISRO) on 26 July 2013 carrying a multi-spectral imager covering visible to long-wave infrared made it possible to obtain profiles of temperature and water vapour over India with higher temporal and vertical res

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Samudraiah, D. R. M., M. Saxena, S. Paul, P. Narayanababu, S. Kuriakose, and A. S. Kiran Kumar. "Payload Configurations for Efficient Image Acquisition – Indian Perspective." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 28, 2014): 1201–6. http://dx.doi.org/10.5194/isprsarchives-xl-8-1201-2014.

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The world is increasingly depending on remotely sensed data. The data is regularly used for monitoring the earth resources and also for solving problems of the world like disasters, climate degradation, etc. Remotely sensed data has changed our perspective of understanding of other planets. With innovative approaches in data utilization, the demands of remote sensing data are ever increasing. More and more research and developments are taken up for data utilization. The satellite resources are scarce and each launch costs heavily. Each launch is also associated with large effort for developing

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Krishna, K. Siva, and D. Venkata Ratnam. "Analysis of differential code biases and inter-system biases for GPS and NavIC satellite constellations." AIMS Electronics and Electrical Engineering 5, no. 3 (2021): 194–205. http://dx.doi.org/10.3934/electreng.2021011.

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<abstract> <p>Multi Global Navigation Satellite System (GNSS) plays an essential role in navigation and geodesy fields for positioning, Navigation, and Timing (PNT) services. The predominant challenge of multi-GNSS is hardware bias errors such as Differential code Bias (DCB) and Inter System Biases (ISB). The estimation of DCB and ISB are essential for analyzing the GNSS system performance to improve the positional accuracy. Navigation with the Indian Constellation (NavIC) system consists of the entire constellation of seven Geo-Stationary satellites to cater to Position Navigation

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Wang, Kan, Pei Chen, and Peter Teunissen. "Single-Epoch, Single-Frequency Multi-GNSS L5 RTK under High-Elevation Masking." Sensors 19, no. 5 (2019): 1066. http://dx.doi.org/10.3390/s19051066.

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The Japanese Quasi-Zenith Satellite System (QZSS) satellite system has placed in orbit four satellites by October 2017. The Indian Regional Navigation Satellite System (IRNSS) system has launched the new satellite IRNNSS-11 in April 2018, completing seven operational satellites. Together with the GPS block IIF satellites and the Galileo satellites, four different global navigation satellite systems (GNSSs) are providing precise L5 signals on the frequency of 1176.45 MHz. In this contribution, we challenge the strength of the multi-GNSS model by analysing its single-frequency (L5), single-epoch

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Sarma, Achanta D., Quddusa Sultana, and Vemuri Satya Srinivas. "Augmentation of Indian Regional Navigation Satellite System to Improve Dilution of Precision." Journal of Navigation 63, no. 2 (2010): 313–21. http://dx.doi.org/10.1017/s037346330999035x.

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The Indian Regional Navigation Satellite System (IRNSS) is an autonomous and independent navigational system being developed by India. IRNSS will provide position, navigation and timing services for national applications. To improve accuracy, it can be augmented using GPS and pseudolites (pseudo-satellites). In this paper, the effect on DOP (Dilution of Precision) due to augmentation of the proposed constellation of IRNSS with pseudolites is investigated. GDOP is reduced to 1·75 (max) from 3·63 (max) due to augmentation of IRNSS with two airport pseudolites (APLs). Due to augmentation of IRNSS

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Aparna, N., A. V. Ramani, and R. Nagaraja. "Risk management support through India Remote Sensing Satellites." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 27, 2014): 1–6. http://dx.doi.org/10.5194/isprsarchives-xl-8-1-2014.

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Remote Sensing along with Geographical Information System (GIS) has been proven as a very important tools for the monitoring of the Earth resources and the detection of its temporal variations. A variety of operational National applications in the fields of Crop yield estimation , flood monitoring, forest fire detection, landslide and land cover variations were shown in the last 25 years using the Remote Sensing data. The technology has proven very useful for risk management like by mapping of flood inundated areas identifying of escape routes and for identifying the locations of temporary hou

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Kumar, Suresh, and Vijay Bhagat. "Remote Sensing Satellites for Land Applications: A Review." Remote Sensing of Land 2, no. 2 (2019): 96–104. http://dx.doi.org/10.21523/gcj1.18020203.

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Satellite remote sensing offers a unique opportunity in deriving various components of land information by integrating with ground based observation. Currently several remote sensing satellites are providing multispectral, hyperspectral and microwave data to cater the need of various land applications. Several old age remote sensing satellites have been updated with new generation satellites offering high spatial, spectral and temporal resolution. Microwave remote sensing data is now available with high spatial resolution and providing land information in cloudy weather condition that strength

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Mukesh, R., V. Karthikeyan, P. Soma, P. Sindhu, and R. R. Elangovan. "Performance analysis of Navigation with Indian Constellation satellites." Journal of King Saud University - Engineering Sciences 32, no. 8 (2020): 518–23. http://dx.doi.org/10.1016/j.jksues.2019.06.002.

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Cui, Haomeng, and Shoujian Zhang. "Satellite Availability and Service Performance Evaluation for Next-Generation GNSS, RNSS and LEO Augmentation Constellation." Remote Sensing 13, no. 18 (2021): 3698. http://dx.doi.org/10.3390/rs13183698.

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Positioning accuracy is affected by the combined effect of user range errors and the geometric distribution of satellites. Dilution of precision (DOP) is defined as the geometric strength of visible satellites. DOP is calculated based on the satellite broadcast or precise ephemerides. However, because the modernization program of next-generation navigation satellite systems is still under construction, there is a lack of real ephemerides to assess the performance of next-generation constellations. Without requiring real ephemerides, we describe a method to estimate satellite visibility and DOP

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Mangala Mani, N., S. Ghetiya, B. Srikanth, C. S. Padmavthi, G. Uma Devi, and Y. V. N. Krishna Murthy. "CHALLENGES IN OPERATIONS AND MAINTENANCE OF ANTARCTICA GROUND STATION FOR EARTH OBSERVATION SATELLITES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (November 19, 2018): 281–83. http://dx.doi.org/10.5194/isprs-archives-xlii-5-281-2018.

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<p><strong>Abstract.</strong> Remote sensing and Geographical Information System (GIS) through Earth Observation (EO) Satellites have become most important tools for many of the societal applications of day-to-day life, during the past few decades of the 21st century, and this need is rapidly increasing. Presently, EO payload (PLD) data from Polar Orbiting Indian Remote Sensing (IRS) Satellite Missions is received at the Integrated Multi-mission Ground segment for Earth Observation Satellites (IMGEOS) at NRSC, Hyderabad, India. But at this geographical location, only four out

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Pastel, M., J. P. Pommereau, F. Goutail, A. Richter, A. Pazmiño, and D. Ionov. "Comparison of long term series of total ozone and NO<sub>2</sub> column measurements in the southern tropics by SAOZ/NDACC UV-Vis spectrometers and satellites." Atmospheric Measurement Techniques Discussions 6, no. 3 (2013): 4851–93. http://dx.doi.org/10.5194/amtd-6-4851-2013.

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Abstract. Long series of ozone and NO2 total column measurements at the Southern tropics are available from two ground-based SAOZ (Système d'Analyse par Observation Zenithale) UV-visible spectrometers operated within the NDACC (Network for the Detection of Amtospheric Composition Change) deployed in Bauru in S-E Brazil and Reunion Island in the S-W Indian Ocean in 1995 and 1993 respectively. Although at the same latitude, the data show larger columns of both species above the South American continent than above the Indian Ocean. For verifying the reliability of these data before carrying out t

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Chandrasekhar, M. G., V. Jayaraman, and Mukund Rao. "Indian remote sensing satellites: Planned missions and future applications." Acta Astronautica 38, no. 4-8 (1996): 647–58. http://dx.doi.org/10.1016/0094-5765(96)00022-7.

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Deb, S. K., C. M. Kishtawal, and P. K. Pal. "Impact of Kalpana-1-Derived Water Vapor Winds on Indian Ocean Tropical Cyclone Forecasts." Monthly Weather Review 138, no. 3 (2010): 987–1003. http://dx.doi.org/10.1175/2009mwr3041.1.

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Abstract The water vapor winds from the operational geostationary Indian National Satellite (INSAT) Kalpana-1 have recently become operational at the Space Applications Centre (SAC). A series of experimental forecasts are attempted here to evaluate the impact of water vapor winds derived from Kalpana-1 for the track and intensity prediction of two Bay of Bengal tropical cyclones (TCs), Sidr and Nargis, using the Weather Research and Forecasting (WRF) modeling system. The assimilation of water vapor winds has made some impact in the initial position errors as well as track forecasts when compar

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Wonsick, Margaret M., Rachel T. Pinker, and Yves Govaerts. "Cloud Variability over the Indian Monsoon Region as Observed from Satellites." Journal of Applied Meteorology and Climatology 48, no. 9 (2009): 1803–21. http://dx.doi.org/10.1175/2009jamc2027.1.

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Abstract This study focuses on documenting the seasonal progression of the Asian monsoon by analyzing clouds and convection in the pre-, peak-, and postmonsoon seasons. This effort was possible as a result of the movement of Meteosat-5 over the Indian continent during the Indian Ocean Experiment (INDOEX) starting in 1998. The Meteosat-5 observations provide a unique opportunity to study in detail the daytime diurnal variability of clouds and components of the radiation budget. Hourly Meteosat-5 observations are utilized to characterize the Indian monsoon daytime cloud variability on seasonal a

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Ghosh, S., A. Sachan, and G. Srinivas. "COLLABORATION AND OUTREACH TOWARDS USE OF GEOSPATIAL TECHNOLOGIES IN INDIA WITH AN EMPHASIS ON ISRO’S EFFORT." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (November 19, 2018): 51–57. http://dx.doi.org/10.5194/isprs-archives-xlii-5-51-2018.

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<p><strong>Abstract.</strong> Geospatial technology is adopted in India through ‘Digital India’, for better governance and socio-economic benefits of common citizens. Remote sensing imageries and derived products are a direct input for geospatial data generation, monitoring resources and providing citizen services. As Indian Space Research Organisation (ISRO) is responsible for technology development, launch and data distribution of Indian remote sensing satellites, there is a conscious effort for partnership development with international space agencies and Indian industries

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Siejka, Zbigniew. "Validation of the Accuracy and Convergence Time of Real Time Kinematic Results Using a Single Galileo Navigation System." Sensors 18, no. 8 (2018): 2412. http://dx.doi.org/10.3390/s18082412.

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For the last two decades, the American GPS and Russian GLONASS were the basic systems used in global positioning and navigation. In recent years, there has been significant progress in the development of positioning systems. New regional systems have been created, i.e., the Japanese Quasi-Zenith Satellite System (QZSS) and Indian Regional Navigational Satellite System (IRNSS). A plan to build its own regional navigation system named Korean Positioning System (KPS) was announced South Korea on 5 February 2018. Currently, two new global navigation systems are under development: the European Gali

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Manaswini, R., and G. Raju. "Effect of Ionosphere on Global Navigation Satellite System and Analysis of the Effects with Real Time Indian Regional Navigation Satellite System Data Positioned at Jain University." Journal of Computational and Theoretical Nanoscience 17, no. 9 (2020): 4061–69. http://dx.doi.org/10.1166/jctn.2020.9020.

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Global navigation satellites systems provide real time positioning and timing services more efficiently and effectively. The ionosphere is one dynamic layer that affects the communication and remote sensing to maximum extent under different conditions. The ionospheric errors affects the integrity, continuity, accuracy and availability of satellites of GNSS systems. These effects are basically because of variation in space weather effects. The environmental conditions of the Earth’s ionosphere, magnetosphere, thermosphere which dynamically varies because of sun activities and consecutively affe

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Verma, Shivali, P. V. N. Rao, Hareef Baba K. Shaeb, M. V. R. Seshasai, and B. PadmaKumari. "Cloud fraction retrieval using data from Indian geostationary satellites and validation." International Journal of Remote Sensing 39, no. 22 (2018): 7965–77. http://dx.doi.org/10.1080/01431161.2018.1479792.

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Ramaswamy, S., B. V. Prasad, R. C. Mahajan, and P. S. Goel. "The role of hardware in-loop motion simulation for Indian satellites." IEEE Transactions on Aerospace and Electronic Systems 27, no. 2 (1991): 261–67. http://dx.doi.org/10.1109/7.78301.

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Das, Samiran, and I. Selvaraj. "Solar array mechanisms for Indian Satellites, APPLE, IRS and INSAT-IITS." Acta Astronautica 17, no. 9 (1988): 979–86. http://dx.doi.org/10.1016/0094-5765(88)90065-3.

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Mangla, Rohit, Indu J, and Chakra S.S. "Inter-comparison of multi-satellites and Aeronet AOD over Indian Region." Atmospheric Research 240 (August 2020): 104950. http://dx.doi.org/10.1016/j.atmosres.2020.104950.

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Ray, S., A. DasGupta, A. Paul, and P. Banerjee. "Estimation of Minimum Separation of Geostationary Satellites for Satellite-Based Augmentation System (SBAS) from Equatorial Ionospheric Scintillation Observations." Journal of Navigation 56, no. 1 (2003): 137–42. http://dx.doi.org/10.1017/s0373463302002059.

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In Satellite-Based Augmentation Systems (SBAS), the correction messages are transmitted to the users' receivers via geostationary communication satellites (GEOS) at GPS L1 (1575·42 MHz) frequency. Severe scintillations in the equatorial zone disrupt geostationary satellite links even at L-band. Observations of scintillations at 1·5 GHz from Calcutta (22·58°N, 88·38°E geographic, 32°N magnetic dip), located near the crest of the equatorial anomaly in the Indian zone, show that scintillations occur in patches of duration varying from a few minutes to several hours. During the solar maximum years

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Champati ray, P. K., and S. L. Chattoraj. "Sunkoshi landslide in Nepal and its possible impact in India: A remote sensing based appraisal." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (December 23, 2014): 1345–51. http://dx.doi.org/10.5194/isprsarchives-xl-8-1345-2014.

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A devastating landslide that killed at least 156 people occurred on the right bank of Sunkoshi river at village Jure, 70 km northeast of Kathmandu in Nepal. It not only affected hydroelectric projects in the near vicinity but also had potential to flood large tracts of downstream area in Nepal and north Bihar. Timely action by Nepal Army and Indian authorities have averted a major disaster but satellite data analysis (using IRS Resourcesat-2 LISS IV, WorldView-2, RISAT-1, Radarsat-2 etc.) reveal that the site was easily identifiable on satellite image as a potential landslide zone that has bee

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Harikumar, R., T. M. Balakrishnan Nair, G. S. Bhat, Shailesh Nayak, Venkat Shesu Reddem, and S. S. C. Shenoi. "Ship-Mounted Real-Time Surface Observational System on board Indian Vessels for Validation and Refinement of Model Forcing Fields*." Journal of Atmospheric and Oceanic Technology 30, no. 3 (2013): 626–37. http://dx.doi.org/10.1175/jtech-d-11-00212.1.

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Abstract A network of ship-mounted real-time Automatic Weather Stations integrated with Indian geosynchronous satellites [Indian National Satellites (INSATs)] 3A and 3C, named Indian National Centre for Ocean Information Services Real-Time Automatic Weather Stations (I-RAWS), is established. The purpose of I-RAWS is to measure the surface meteorological–ocean parameters and transmit the data in real time in order to validate and refine the forcing parameters (obtained from different meteorological agencies) of the Indian Ocean Forecasting System (INDOFOS). Preliminary validation and intercompa

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Stosius, R., G. Beyerle, A. Helm, A. Hoechner, and J. Wickert. "Simulation of space-borne tsunami detection using GNSS-Reflectometry applied to tsunamis in the Indian Ocean." Natural Hazards and Earth System Sciences 10, no. 6 (2010): 1359–72. http://dx.doi.org/10.5194/nhess-10-1359-2010.

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Abstract. Within the German-Indonesian Tsunami Early Warning System project GITEWS (Rudloff et al., 2009), a feasibility study on a future tsunami detection system from space has been carried out. The Global Navigation Satellite System Reflectometry (GNSS-R) is an innovative way of using reflected GNSS signals for remote sensing, e.g. sea surface altimetry. In contrast to conventional satellite radar altimetry, multiple height measurements within a wide field of view can be made simultaneously. With a dedicated Low Earth Orbit (LEO) constellation of satellites equipped with GNSS-R, densely spa

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Lewis, D. "Indian tracking and data acquisition facilities for low Earth and geosynchronous satellites." IEEE Aerospace and Electronic Systems Magazine 8, no. 2 (1993): 19–27. http://dx.doi.org/10.1109/62.193024.

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Singh, Ramesh P., and Felix Kogan. "Monitoring vegetation condition from NOAA operational polar-orbiting satellites over Indian region." Journal of the Indian Society of Remote Sensing 30, no. 3 (2002): 117–18. http://dx.doi.org/10.1007/bf02990643.

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Banerjee, P., Anindya Bose, and Ashish Dasgupta. "The Usefulness of GLONASS for Positioning in the Presence of GPS in the Indian Subcontinent." Journal of Navigation 55, no. 3 (2002): 463–75. http://dx.doi.org/10.1017/s0373463302001960.

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The effort to integrate the use of GPS and GLONASS constellations resulted in the production of a special receiver, which can use both constellations in combination. These receivers may be used in GPS only mode, GLONASS mode and combined (both GPS and GLONASS) mode. Utilising this type of receiver, GPS and GLONASS signals were monitored for one calendar year simultaneously in different places in India to study the status of visibility of satellites and the positioning accuracy. The number of satellites in GLONASS constellation gradually depleted from 16 to 7 during the course of this study. So

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Arasavali, Nalineekumari, Sasibhushana Rao Gottapu, and N. Ashok Kumar. "GDOP Analysis with Optimal Satellites Using GA for Southern Region of Indian Subcontinent." Procedia Computer Science 143 (2018): 303–8. http://dx.doi.org/10.1016/j.procs.2018.10.400.

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Verma, P., S. K. Ghosh, and R. Ramsankaran. "ESTIMATION OF SNOW DEPLETION CURVE FOR GANGOTRI BASIN USING MULTI-SOURCE REMOTE SENSING DATA." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2021 (June 17, 2021): 197–202. http://dx.doi.org/10.5194/isprs-annals-v-3-2021-197-2021.

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Abstract. Snow Depletion Curve derived from satellite images is a key parameter in Snowmelt Runoff Model. The fixed temporal resolution of a satellite and presence of cloud cover in Himalayas restricts accuracy of generated SDC. This study presents an effective approach of reducing temporal interval between two consecutive dates by integrating normalized Snow Cover Area estimated from multiple sources of satellite data. SCA is extracted by using Normalized Difference Snow Index for six snowmelt seasons from 2013 to 2018 for Gangotri basin situated in Indian Himalayas. This work also explores p

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Kumar, S., A. K. Singh, and R. P. Singh. "Ionospheric response to total solar eclipse of 22 July 2009 in different Indian regions." Annales Geophysicae 31, no. 9 (2013): 1549–58. http://dx.doi.org/10.5194/angeo-31-1549-2013.

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Abstract. The variability of ionospheric response to the total solar eclipse of 22 July 2009 has been studied analyzing the GPS data recorded at the four Indian low-latitude stations Varanasi (100% obscuration), Kanpur (95% obscuration), Hyderabad (84% obscuration) and Bangalore (72% obscuration). The retrieved ionospheric vertical total electron content (VTEC) shows a significant reduction (reflected by all PRNs (satellites) at all stations) with a maximum of 48% at Varanasi (PRN 14), which decreases to 30% at Bangalore (PRN 14). Data from PRN 31 show a maximum of 54% at Kanpur and 26% at Hyd

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Patra, P. K., S. K. Behera, J. R. Herman, S. Maksyutov, H. Akimoto, and Y. Yamagata. "The Indian summer monsoon rainfall: interplay of coupled dynamics, radiation and cloud microphysics." Atmospheric Chemistry and Physics 5, no. 8 (2005): 2181–88. http://dx.doi.org/10.5194/acp-5-2181-2005.

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Abstract. The Indian summer monsoon rainfall (ISMR), which has a strong connection to agricultural food production, has been less predictable by conventional models in recent times. Two distinct years 2002 and 2003 with lower and higher July rainfall, respectively, are selected to help understand the natural and anthropogenic influences on ISMR. We show that heating gradients along the meridional monsoon circulation are reduced due to aerosol radiative forcing and the Indian Ocean Dipole in 2002. An increase in the dust and biomass-burning component of the aerosols through the zonal monsoon ci

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Patra, P. K., S. K. Behera, J. R. Herman, S. Maksyutov, H. Akimoto, and T. Yamagata. "The Indian summer monsoon rainfall: interplay of coupled dynamics, radiation and cloud microphysics." Atmospheric Chemistry and Physics Discussions 5, no. 3 (2005): 2879–95. http://dx.doi.org/10.5194/acpd-5-2879-2005.

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Abstract. The Indian summer monsoon rainfall (ISMR), which has a strong connection to agricultural food production, has been less predictable by conventional models in recent times. Two distinct years 2002 and 2003 with lower and higher July rainfall, respectively, are selected to help understand the natural and anthropogenic influences on ISMR. We show that heating gradients along the meridional monsoon circulation are reduced due to aerosol radiative forcing and the Indian Ocean Dipole in 2002. An increase in the dust and biomass-burning component of the aerosols through the zonal monsoon ci

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Goroshi, S. K., R. P. Singh, R. Pradhan, and J. S. Parihar. "Assessment of net primary productivity over India using Indian geostationary satellite (INSAT-3A) data." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 28, 2014): 561–68. http://dx.doi.org/10.5194/isprsarchives-xl-8-561-2014.

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Polar orbiting satellites (MODIS and SPOT) have been commonly used to measure terrestrial Net Primary Productivity (NPP) at regional/global scale. Charge Coupled Device (CCD) instrument on geostationary INSAT-3A platform provides a unique opportunity for continuous monitoring of ecosystem pattern and process study. An <i>improved</i> Carnegie-Ames-Stanford Approach (<i>i</i>CASA) model is one of the most expedient and precise ecosystem models to estimate terrestrial NPP. In this paper, an assessment of terrestrial NPP over India was carried out using the iCASA ecosystem

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Zia-Ur-Rehman, M., H. W. Herrmann, U. Hameed, M. S. Haider, and J. K. Brown. "First Detection of Cotton leaf curl Burewala virus and Cognate Cotton leaf curl Multan betasatellite and Gossypium darwinii symptomless alphasatellite in Symptomatic Luffa cylindrica in Pakistan." Plant Disease 97, no. 8 (2013): 1122. http://dx.doi.org/10.1094/pdis-12-12-1159-pdn.

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Cotton leaf curl disease (CLCuD) is the major plant viral constraint to cotton production on the Indian subcontinent (2). CLCuD is primarily caused by begomovirus, Cotton leaf curl Burewala virus (CLCuBuV), and Cotton leaf curl Multan betasatellite (CLCuMB). During 2011 in Burewala, Pakistan, plants in a production field of Luffa cylindrica (Ghia tori) were infested with the whitefly Bemisia tabaci (Genn.), and ~60% of the plants exhibited leaf curling and stunting symptoms, reminiscent of those caused by begomoviruses (Geminiviridae). Total DNA was extracted from five different symptomatic le

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Velden, Christopher, Timothy Olander, Derrick Herndon, and James P. Kossin. "Reprocessing the Most Intense Historical Tropical Cyclones in the Satellite Era Using the Advanced Dvorak Technique." Monthly Weather Review 145, no. 3 (2017): 971–83. http://dx.doi.org/10.1175/mwr-d-16-0312.1.

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In recent years, a number of extremely powerful tropical cyclones have revived community debate on methodologies used to estimate the lifetime maximum intensity (LMI) of these events. And how do these storms rank historically? In this study, the most updated version of an objective satellite-based intensity estimation algorithm [advanced Dvorak technique (ADT)] is employed and applied to the highest-resolution (spatial and temporal) geostationary satellite data available for extreme-intensity tropical cyclones that occurred during the era of these satellites (1979–present). Cases with reconnai

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Choudhury, I., B. K. Bhattacharya, R. Eswar, and M. Sekhar. "A BASELINE QUANTIFICATION OF AGRICULTURAL WATER USE EFFICIENCY OVER INDIAN REGION USING GEO-LEO SATELLITES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W6 (July 26, 2019): 277–84. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w6-277-2019.

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<p><strong>Abstract.</strong> The agricultural water use efficiency (AWUE) over India was evaluated during 2009&amp;ndash;2014 through three steps e.g. productivity mapping using MODIS GPP; consumptive water use (CWU) mapping in terms of evapotranspiration (ET) partioned into green (CWU<sub>g</sub>; ET streaming from rainfall) and blue (CWU<sub>b</sub>; ET streaming from irrigation) water; AWUE mapping i.e. the ratio of the seasonal sum of GPP and CWU in terms of green (AWUF<sub>g</sub>) and blue (AWUF<sub>b</sub>) water. Th

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Murthy, C. S., M. V. R. Sesha Sai, V. Bhanuja Kumari, and P. S. Roy. "Agricultural drought assessment at disaggregated level using AWiFS/WiFS data of Indian Remote Sensing satellites." Geocarto International 22, no. 2 (2007): 127–40. http://dx.doi.org/10.1080/10106040701205039.

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Seiz, Gabriela, Stephen Tjemkes, and Philip Watts. "Multiview Cloud-Top Height and Wind Retrieval with Photogrammetric Methods: Application to Meteosat-8 HRV Observations." Journal of Applied Meteorology and Climatology 46, no. 8 (2007): 1182–95. http://dx.doi.org/10.1175/jam2532.1.

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Abstract The European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) currently operates three geostationary satellites: Meteosat-5, Meteosat-7, and Meteosat-8. Observations by Meteosat-5 can be combined with observations from either Meteosat-7 or Meteosat-8 to allow geostationary stereo height retrievals within the overlap area over the Indian Ocean and east Africa. This paper aims to demonstrate the capabilities of the geostationary stereophotogrammetric cloud-top height retrieval—in particular, with the new high-resolution visible channel (HRV) of Meteosat-8. Conce

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Dwivedi, Sanjeev, M. S. Narayanan, M. Venkat Ratnam, and D. Narayana Rao. "Characteristics of Monsoon inversions over Arabian Sea observed by satellite sounder and reanalysis data sets." Atmospheric Chemistry and Physics Discussions 15, no. 23 (2015): 35277–312. http://dx.doi.org/10.5194/acpd-15-35277-2015.

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Abstract. Monsoon inversions (MIs) over Arabian Sea (AS) are an important characteristic associated with the monsoon activity over Indian region during summer monsoon season. In the present study, we have used five years (2009–2013) data of temperature and water vapor profiles obtained from satellite sounder instrument, Infrared Atmospheric Sounding Interferometer (IASI) onboard MetOp satellite, besides ERA-Interim data, to study their characteristics. The lower atmospheric data over the AS have been examined first to identify the areas where monsoon inversions are predominant and occur with h

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