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Gotowe bibliografie tematyczne / MLT radars

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Artykuły w czasopismach

Gotowa bibliografia na temat „MLT radars”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "MLT radars"

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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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Portnyagin, Y. I., T. V. Solovjova, N. A. Makarov, et al. "Monthly mean climatology of the prevailing winds and tides in the Arctic mesosphere/lower thermosphere." Annales Geophysicae 22, no. 10 (2004): 3395–410. http://dx.doi.org/10.5194/angeo-22-3395-2004.

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Abstract. The Arctic MLT wind regime parameters measured at the ground-based network of MF and meteor radar stations (Andenes 69° N, Tromsø 70° N, Esrange 68° N, Dixon 73.5° N, Poker Flat 65° N and Resolute Bay 75° N) are discussed and compared with those observed in the mid-latitudes. The network of the ground-based MF and meteor radars for measuring winds in the Arctic upper mesosphere and lower thermosphere provides an excellent opportunity for study of the main global dynamical structures in this height region and their dependence from longitude. Preliminary estimates of the differences be

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Stober, Gunter, Alan Liu, Alexander Kozlovsky, et al. "Identifying gravity waves launched by the Hunga Tonga–Hunga Ha′apai volcanic eruption in mesosphere/lower-thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster." Annales Geophysicae 41, no. 1 (2023): 197–208. http://dx.doi.org/10.5194/angeo-41-197-2023.

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Abstract. The Hunga Tonga–Hunga Ha′apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower-thermosphere (MLT) launched by the volcanic explosion in the Pacific, leveraging multistatic meteor radar observations from the Chilean Observation Network De Meteor Radars (CONDOR) and the Nordic Meteor Radar Cluster in Fennoscandia. MLT winds are computed using a recently developed 3DVAR+DIV algorithm. We found eastward- and westward-traveling gravity waves in the CONDOR zonal a

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4

Singer, W., J. Bremer, P. Hoffmann, et al. "Geomagnetic influences upon tides—winds from MLT radars." Journal of Atmospheric and Terrestrial Physics 56, no. 10 (1994): 1301–11. http://dx.doi.org/10.1016/0021-9169(94)90068-x.

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Manson, A. H., C. E. Meek, C. M. Hall, et al. "Mesopause dynamics from the scandinavian triangle of radars within the PSMOS-DATAR Project." Annales Geophysicae 22, no. 2 (2004): 367–86. http://dx.doi.org/10.5194/angeo-22-367-2004.

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Abstract. The "Scandinavian Triangle" is a unique trio of radars within the DATAR Project (Dynamics and Temperatures from the Arctic MLT (60–97km) region): Andenes MF radar (69°N, 16°E); Tromsø MF radar (70°N, 19°E) and Esrange "Meteor" radar (68°N, 21°E). The radar-spacings range from 125-270km, making it unique for studies of wind variability associated with small-scale waves, comparisons of large-scale waves measured over small spacings, and for comparisons of winds from different radar systems. As such it complements results from arrays having spacings of 25km and 500km that have been loca

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van Caspel, Willem E., Patrick J. Espy, Robert E. Hibbins, and John P. McCormack. "Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars." Annales Geophysicae 38, no. 6 (2020): 1257–65. http://dx.doi.org/10.5194/angeo-38-1257-2020.

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Abstract. This study uses hourly meteor wind measurements from a longitudinal array of 10 high-latitude SuperDARN high-frequency (HF) radars to isolate the migrating diurnal, semidiurnal, and terdiurnal tides at mesosphere–lower-thermosphere (MLT) altitudes. The planetary-scale array of radars covers 180∘ of longitude, with 8 out of 10 radars being in near-continuous operation since the year 2000. Time series spanning 16 years of tidal amplitudes and phases in both zonal and meridional wind are presented, along with their respective annual climatologies. The method to isolate the migrating tid

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Zhong, Wei, Xianghui Xue, Wen Yi, Iain M. Reid, Tingdi Chen, and Xiankang Dou. "Error analyses of a multistatic meteor radar system to obtain a three-dimensional spatial-resolution distribution." Atmospheric Measurement Techniques 14, no. 5 (2021): 3973–88. http://dx.doi.org/10.5194/amt-14-3973-2021.

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Abstract. In recent years, the concept of multistatic meteor radar systems has attracted the attention of the atmospheric radar community, focusing on the mesosphere and lower thermosphere (MLT) region. Recently, there have been some notable experiments using such multistatic meteor radar systems. Good spatial resolution is vital for meteor radars because nearly all parameter inversion processes rely on the accurate location of the meteor trail specular point. It is timely then for a careful discussion focused on the error distribution of multistatic meteor radar systems. In this study, we dis

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8

Rokade, M. V., R. Kondala Rao, S. S. Nikte, et al. "Intraseasonal oscillation (ISO) in the MLT zonal wind over Kolhapur (16.8° N) and Tirunelveli (8.7° N)." Annales Geophysicae 30, no. 12 (2012): 1623–31. http://dx.doi.org/10.5194/angeo-30-1623-2012.

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Abstract. Simultaneous observations of the mean zonal winds at 88 km obtained by the medium-frequency (MF) radars at Kolhapur (16.8° N, 74.2° E) and Tirunelveli (8.7° N, 77.8° E) have been used to study the intraseasonal oscillation (ISO) in the MLT region. The influences of the intraseasonal variations in the lower tropospheric convective activity associated with the Madden-Julian oscillations on the latitudinal behavior of intraseasonal oscillations (ISO) of the zonal winds in the equatorial mesosphere and lower thermosphere (MLT) have been studied. The ISO activity in the lower tropospheric

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Makarevich, R. A., and P. L. Dyson. "Dual HF radar study of the subauroral polarization stream." Annales Geophysicae 25, no. 12 (2007): 2579–91. http://dx.doi.org/10.5194/angeo-25-2579-2007.

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Abstract. The dual HF radars comprising the Tasman International Geophysical Environment Radar (TIGER) system often observe localized high-velocity F-region plasma flows (≥1500 m/s) in the midnight sector (20:00–02:00 MLT) at magnetic latitudes as low as Λ=60° S. The flow channels exhibit large variability in the latitudinal extent and electric field strength, and are similar to the subauroral polarization stream or SAPS, a plasma convection feature thought to be related to the polarization electric field due to the charge separation during substorm and storm development. In this study, the 2-

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Chau, Jorge Luis, Juan Miguel Urco, Juha Pekka Vierinen, et al. "Novel specular meteor radar systems using coherent MIMO techniques to study the mesosphere and lower thermosphere." Atmospheric Measurement Techniques 12, no. 4 (2019): 2113–27. http://dx.doi.org/10.5194/amt-12-2113-2019.

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Abstract. Typical specular meteor radars (SMRs) use one transmitting antenna and at least a five-antenna interferometric configuration on reception to study the mesosphere and lower thermosphere (MLT) region. The interferometric configuration allows the measurement of the angle-of-arrival (AOA) of the detected meteor echoes, which in turn is needed to derive atmospheric parameters (e.g., mean winds, momentum fluxes, temperatures, and neutral densities). Recently, we have shown that coherent MIMO configurations in atmospheric radars, i.e., multiple input (transmitters) and multiple output (rece

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