Results 11 to 20 of about 766,863 (306)

Radio Interferometric Observation of an Asteroid Occultation [PDF]

open access: yesThe 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
openaire   +7 more sources

Progress of radio occultation exploration of Mars

open access: yes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   +2 more sources

First Observations of Mars Atmosphere and Ionosphere with Tianwen-1 Radio-Occultation Technique on 5 August 2021

open access: yesRemote Sensing, 2022
The radio-occultation technique can provide vertical profiles of planetary ionospheric and atmospheric parameters, which merit the planetary-climate and space-weather scientific research so far.
Xiong Hu   +23 more
doaj   +1 more source

High-order ionospheric effects on electron density estimation from Fengyun-3C GPS radio occultation [PDF]

open access: yesAnnales Geophysicae, 2017
GPS radio occultation can estimate ionospheric electron density and total electron content (TEC) with high spatial resolution, e.g., China's recent Fengyun-3C GPS radio occultation. However, high-order ionospheric delays are normally ignored.
J. Li, J. Li, S. Jin, S. Jin
doaj   +1 more source

A comparison of FORMOSAT-3/COSMIC radio occultation and ionosonde measurements in sporadic E detection over mid- and low-latitude regions

open access: yesFrontiers in Astronomy and Space Sciences, 2023
The investigation of sporadic E or Es layers typically relies on ground-based or satellite data. This study compares the Es layers recorded in ionograms with those detected using GNSS L1 signal-to-noise ratio data from FORMOSAT-3/COSMIC radio occultation
S. Sobhkhiz-Miandehi   +6 more
doaj   +1 more source

GNSS Radio Occultation in Advanced Numerical Weather Prediction Models

open access: yesGEOmedia, 2019
GPS-Radio Occultation (GPS-RO), and generally, Global Navigation Satellite System Radio Occultation (GNSS-RO), is a technique that measures the refractivity of the Earth's atmosphere as a Low Earth Orbit (LEO) satellite listens to the radio signal of a ...
Guillermo Bosch
doaj   +3 more sources

Flower elliptical-orbit constellation exploiting millimetre-wave radiometry and radio occultation for meteo-climatological applications [PDF]

open access: yesAdvances in Geosciences, 2010
This paper reports on the potential of combining elliptical-orbit Flower constellations with millimeter-wave radiometry and radio-occultation, a mission concept briefly named FloRad2.
F. S. Marzano, D. Cimini
doaj   +1 more source

Space and ground segment performance and lessons learned of the FORMOSAT-3/COSMIC mission: four years in orbit [PDF]

open access: yesAtmospheric Measurement Techniques, 2011
The FORMOSAT-3/COSMIC (Constellation Observing System for Meteorology, Ionosphere, and Climate) Mission consisting of six Low-Earth-Orbit (LEO) satellites is the world's first demonstration constellation using radio occultation signals from Global ...
C.-J. Fong   +9 more
doaj   +1 more source

Radio occultation bending angle anomalies during tropical cyclones [PDF]

open access: yesAtmospheric Measurement Techniques, 2011
The tropical deep convection affects the radiation balance of the atmosphere changing the water vapor mixing ratio and the temperature of the upper troposphere lower stratosphere.
R. Biondi   +3 more
doaj   +1 more source

A nonlinear optimal, estimation inverse method for radio occultation measurements of temperature, humidity, and surface pressure [PDF]

open access: yes, 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 ...
J. R. Eyre   +7 more
core   +1 more source

Home - About - Disclaimer - Privacy