Results 41 to 50 of about 14,356 (303)
Advances in Meteorology, 2018 Based on the Backward Four-Dimensional Variational Data Assimilation (Backward-4DVar) system with the Advanced Regional Eta-coordinate Model (AREM), which is capable of assimilating radio occultation data, a heavy rainfall case study is performed using ...
Wei Cheng +3 more
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Real-Time Tomographic Inversion of Truncated Ionospheric GNSS Radio Occultations
Remote Sensing, 2023 This paper presents a new way of combining Abel inversion and the Chapman model with a linearly increasing scale height to retrieve ionospheric electron density vertical profiles from truncated-sounding radio-occultation data. A linear Vary–Chap model is
Germán Olivares-Pulido +9 more
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Egyptian Journal of Remote Sensing and Space Sciences, 2022 Difference values between Global Positioning System (GPS)-Radio Occultation (RO) and radiosonde (RS) profiles are analyzed to assess the integration applicability between them in Egypt.
Ibrahim Fouad Ahmed +3 more
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Radio Occultation Exploration of Mars [PDF]
Symposium - International Astronomical Union, 1974 The radio occultation technique, consisting of the observation of changes in the phase, frequency, and amplitude of a radio signal from a spacecraft as it passes through the atmosphere of a planet before and after occultation, was first applied to measure the atmosphere of Mars with the Mariner IV spacecraft in 1965. The interpretation of these changes
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Estimation and evaluation of COSMIC radio occultation excess phase using undifferenced measurements [PDF]
Atmospheric Measurement Techniques, 2017 In the GPS radio occultation technique, the atmospheric excess phase (AEP) can be used to derive the refractivity, which is an important quantity in numerical weather prediction.
P. Xia, S. Ye, K. Jiang, D. Chen
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Radio Interferometric Observation of an Asteroid Occultation [PDF]
The Astronomical Journal, 2018 Abstract The occultation of the radio galaxy 0141+268 by the asteroid (372) Palma on 2017 May 15 was observed using six antennas of the Very Long Baseline Array (VLBA). The shadow of Palma crossed the VLBA station at Brewster, Washington.
Jorma Harju +7 more
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Exploring atmospheric blocking with GPS radio occultation observations [PDF]
Atmospheric Chemistry and Physics, 2015 Abstract. Atmospheric blocking has been closely investigated in recent years due to its impact on weather and climate, such as heat waves, droughts, and flooding. We use, for the first time, satellite-based observations from Global Positioning System (GPS) radio occultation (RO) and explore their ability to resolve blocking in order to potentially open
L. Brunner +7 more
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Progress of radio occultation exploration of Mars
地球与行星物理论评Mars is the sister star of Earth. Studying Mars is important to understand its evolution as well as that of Earth and even the solar system. Since the launch of American Mariner 4 in 1964 and the first successful use of radio occultation technology to ...
Luo Xiao +5 more
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Wave optics‐based LEO‐LEO radio occultation retrieval [PDF]
Radio Science, 2016 AbstractThis paper describes the theory for performing retrieval of radio occultations that use probing frequencies in the XK and KM band. Normally, radio occultations use frequencies in the L band, and GPS satellites are used as the transmitting source, and the occultation signals are received by a GPS receiver on board a Low Earth Orbit (LEO ...
Benzon, Hans-Henrik, Høeg, Per
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Fluctuations of radio occultation signals in sounding the Earth's atmosphere [PDF]
Atmospheric Measurement Techniques, 2018 We discuss the relationships that link the observed fluctuation spectra of the amplitude and phase of signals used for the radio occultation sounding of the Earth's atmosphere, with the spectra of atmospheric inhomogeneities.
V. Kan +3 more
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