A non-linear optimal estimation inverse method for radio occultation measurements of temperature, humidity and surface pressure [PDF]
, 2000 An optimal estimation inverse method is presented which can be used to retrieve simultaneously vertical profiles of temperature and specific humidity, in addition to surface pressure, from satellite-to-satellite radio occultation observations of the Earth's atmosphere.
arxiv +1 more source
Evaluation of the 15-year ROM SAF monthly mean GPS radio occultation climate data record
Atmospheric Measurement Techniques, 2019 . We here present results from an evaluation of the Radio Occultation Meteorology Satellite Application Facility (ROM SAF) gridded monthly mean climate data record (CDR v1.0), based on Global Positioning System (GPS) radio occultation (RO) data from the ...
H. Gleisner +3 more
semanticscholar +1 more source
GNSS radio occultation profiles in the neutral atmosphere from inversion of excess phase data
Terrestrial, Atmospheric and Oceanic Sciences, 2019 Long-term stability, global coverage and high resolution are characteristics that make the Global Navigation Satellite System (GNSS) radio occultation (RO) technique well-suitable to serve as anchor measurements for observing the Earth’s atmosphere.
Paweł Hordyniec +4 more
doaj +1 more source
J. Sensors, 2018 Precipitable water vapor (PWV) content detection is vital to heavy rain prediction; up to now, lots of different measuring methods and devices are developed to observe PWV.
Qin Zhang +3 more
semanticscholar +1 more source
A method to improve the determination of wave perturbations close to the tropopause by using a digital filter [PDF]
Atmospheric Measurement Techniques, 2011 GPS radio occultation satellite data allowed to analyze in the last decade for the first time a large amount of atmospheric temperature profiles including both the troposphere and the stratosphere all over the globe. Wave amplitude enhancements have been
J. Wickert +6 more
doaj +1 more source
A procedure to analyze nonlinear density waves in Saturn's rings using several occultation profiles [PDF]
Icarus, 199, 154-173 (2009), 2010 Cassini radio science experiments have provided multiple occultation optical depth profiles of Saturn's rings that can be used in combination to analyze density waves. This paper establishes an accurate procedure of inversion of the wave profiles to reconstruct the wave kinematic parameters as a function of semi-major axis, in the nonlinear regime ...
arxiv +1 more source
Variability of the Martian ionosphere from the MAVEN Radio Occultation Science Experiment
Earth and Planetary Physics, 2019 The Martian ionosphere is produced by a number of controlling processes, including solar extreme ultraviolet radiation (EUV) and X‐ray ionization, impact ionization by precipitating electrons, and day‐to‐night transport.
Meijuan Yao +4 more
semanticscholar +1 more source
Density fluctuation in the solar corona and solar wind: A comparative analysis of radio-occultation observations and magnetohydrodynamic simulation [PDF]
A&A 695, A192 (2025)Recent in-situ observations and numerical models indicated various types of magnetohydrodynamic (MHD) waves contributing to the solar wind acceleration. Among them is an MHD wave decomposition at distances closer than 50 $R_{\odot}$ using data taken by the first perihelion pass of Parker Solar Probe (PSP).
arxiv +1 more source
Remote Sensing, 2019 The Global Navigation Satellite System (GNSS) Radio Occultation (RO) is a key technique for obtaining thermodynamic profiles of temperature, humidity, pressure, and density in the Earth’s troposphere.
Ying Li +6 more
semanticscholar +1 more source
Keck High Resolution Spectroscopy of PKS 0123+257: Intrinsic Absorption in a Radio Loud Quasar [PDF]
Astron.J.113:136-143,1997, 1996 We present results from Keck I high resolution spectroscopy of the radio loud quasar PKS 0123+257 ($z_e$=2.364, V=17.5). In this object we detect Ly$\alpha$, N V 1238,1242, Si IV 1393,1402, and C IV 1548,1550 in an absorption system at a redshift of 2.369.
arxiv +1 more source