Results 161 to 170 of about 847,572 (191)
Experimental Validation of GNSS Interferometric Radio Occultation [PDF]
Remote Sensing, 2019 In this work, we present experimental results on the interferometric radio occultation (iRO) signal processing techniques, and compare the performance to the closed-loop and open-loop processing used in conventional radio occultation measurements. We also discuss the effects of antenna beam width to mitigate inter-satellite interferences, as well as ...
Manuel Martin-Neira +2 more
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Sensing Heavy Precipitation With GNSS Polarimetric Radio Occultations [PDF]
Geophysical Research Letters, 2019 AbstractThis study presents, for the first time ever, occulting signals of the Global Navigation Satellite Systems (GNSSs) acquired at two polarizations from a Low Earth Orbiter, and it shows that they sense heavy precipitation. The data sets are obtained from early stages of the Radio Occultation and Heavy Precipitation experiment aboard the PAZ ...
Chi O Ao +2 more
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The effect of solar radio bursts on the GNSS radio occultation signals
Journal of Geophysical Research: Space Physics, 2013AbstractSolar radio burst (SRB) is the radio wave emission after a solar flare, covering a broad frequency range, originated from the Sun's atmosphere. During the SRB occurrence, some specific frequency radio wave could interfere with the Global Navigation Satellite System (GNSS) signals and therefore disturb the received signals.
Libo Liu, Biqiang Zhao
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Theory of GNSS Radio Occultation
2013In this chapter, a brief history of the radio occultation remote sensing technique is introduced. The physical principles of GNSS radio occultation (RO) technique are discussed, and the detailed GNSS RO processing steps are presented ...
Shuanggen Jin +2 more
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Ionosphere probing with simultaneous GNSS radio occultations
GPS Solutions, 2016Radio occultation (RO) is a powerful technique for providing vertical profiles of refractivity, temperature, pressure, and water vapor of the neutral atmosphere and electron density of the ionosphere. The Abel inversion method which is based on the spherical symmetry assumption has been widely utilized to retrieve electron density profiles (EDPs) from ...
Viet-Cuong Pham, Jyh-Ching Juang
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GNSS Interferometric Radio Occultation
IEEE Transactions on Geoscience and Remote Sensing, 2016GNSS Reflectometry, Scatterometry and Radio Occultation aboard ISS is the mission concept under study within the European Space Agency. Its core payload consists of an interferometric GNSS-Reflectometry ocean altimeter/scatterometer which does not need to generate any clean replicas of the GNSS codes for its operation.
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Developments of GNSS Radio Occultation for Sounding Atmosphere
2009 International Conference on Environmental Science and Information Application Technology, 2009Compared to traditional radiosonde and radar probing, the Global Navigation Satellite System radio occultation (GNSS RO) is a powerful tool for atmospheric sounding, which have many traits such as no calibration, all-weather, almost uniform global coverage, high precision and vertical resolution. In this paper, investigative actuality which we make use
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Ionospheric Regions Producing Anomalous GNSS Radio Occultation Results
IEEE Transactions on Geoscience and Remote Sensing, 2018Anomalous GPS radio occultation (RO) events are characterised as those with L1 bending angle greater than their corresponding L2 bending angle. An investigation by EUMETSAT and the United Kingdom Meteorological Office revealed there are regions in the earth’s atmosphere where at times up to 60% of Global Navigation Satellite System Receiver for ...
Robert J. Norman +8 more
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COSMIC-2 Status and GNSS Radio Occultation Results
2020<p>We present status and atmospheric retrieval results for the FORMOSAT-7/COSMIC-2 (COSMIC-2) mission. COSMIC-2 mission jointly managed by NOAA and Taiwan's National Space Organization (NSPO) and consists of six satellites launched on June 25, 2019 into a 24-degree inclination orbit.
Jan-Peter Weiss, Wei Xia-Serafino
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On constellation design of multi-GNSS radio occultation mission
Acta Astronautica, 2013Abstract The FORMOSAT-3/COSMIC mission which is a joint Taiwan-US mission for meteorological, climatological, ionospheric, and geodetic studies has successfully provided a significant amount of GPS radio occultation (RO) data for better modeling of climate model, forecasting of weather, and monitoring of ionosphere.
Jyh-Ching Juang +2 more
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