Results 71 to 80 of about 896,848 (251)
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
doaj +1 more source
Assimilation of GNSS radio occultation observations in GRAPES [PDF]
Atmospheric Measurement Techniques, 2014 Abstract. This paper reviews the development of the global navigation satellite system (GNSS) radio occultation (RO) observations assimilation in the Global/Regional Assimilation and PrEdiction System (GRAPES) of China Meteorological Administration, including the choice of data to assimilate, the data quality control, the observation operator, the ...
Y. Liu, Y. Liu, J. Xue
openaire +4 more sources
Forthcoming Close Angular Approaches of Planets to Radio Sources and Possibilities to Use Them as GR Tests [PDF]
Solar System Research, 2009, Vol. 43, No. 4, pp. 313-318, 2009 During close angular approaches of solar system planets to astrometric radio sources, the apparent positions of these sources shift due to relativistic effects and, thus, these events may be used for testing the theory of general relativity; this fact was successfully demonstrated in the experiments on the measurements of radio source position shifts ...
arxiv +1 more source
Consistency and structural uncertainty of multi-mission GPS radio occultation records
Atmospheric Measurement Techniques, 2019 . Atmospheric climate monitoring requires observations of high quality that conform to the criteria of the Global Climate Observing System (GCOS). Radio occultation (RO) data based on Global Positioning System (GPS) signals are available since 2001 from ...
A. Steiner +17 more
semanticscholar +1 more source
Occultation observation to probe the turbulence scale size in the plasma tail of comet Schwassmann-Wachmann 3-B [PDF]
2007, ApJ, 668, L67, 2007 We present the occultation observation of compact radio source B0019-000 through the plasma tail of comet Schwassmann-Wachmann 3-B. The observation was made with the Ooty Radio Telescope at 326.5 MHz on 2006 May 26, when the plasma tail of the comet was in front of this source.
arxiv +1 more source
Journal of Atmospheric and Oceanic Technology, 2019 Global positioning system (GPS) radio occultation (RO) is capable of retrieving vertical profiles of atmospheric parameters with high resolution (
Z. Zeng +3 more
semanticscholar +1 more source
GPS Radio Occultation Method for Ionosphere TEC Monitoring [PDF]
فصلنامه علوم و فناوری فضایی, 2013 In this paper GPS radio occultation has been introduced as a way to extract the electron density of the ionosphere. A GPS radio occultation occurs when a receiver on-board a LEO spacecraft tracks a GPS satellite as it sets or rises through the earth’s ...
Sh. Amiri, M. Fahami
doaj
A simplified approach for generating GNSS radio occultation refractivity climatologies [PDF]
Atmospheric Measurement Techniques, 2013 The possibility of simplifying the retrieval scheme required to produce GNSS radio occultation refractivity climatologies is investigated. In a new, simplified retrieval approach, the main statistical analysis is performed in bending angle space and an ...
H. Gleisner, S. B. Healy
doaj +1 more source
The GPS Radio Occultation Technique
Terrestrial, Atmospheric and Oceanic Sciences, 2000 Radio occultation observations represent a planetary-scale optics experiment in which the atmosphere acts as a lens and alters the propagation velocity and paths of microwave signals passing through it. In this paper we review the process of inverting the radio occultation observations acquired using the Global Positioning System (GPS) in order to ...
Stephen S. Leroy +3 more
openaire +3 more sources
GPS Solutions, 2018 Ionospheric sporadic-E (Es) activity and global morphology were studied using the 50 Hz signal-to-noise ratio amplitude and excess phase measurements from the FormoSat-3/Constellation Observing System for Meteorology, Ionosphere and Climate (FS3/COSMIC ...
L. Tsai +5 more
semanticscholar +1 more source