Results 171 to 180 of about 1,121 (191)

An assessment of GNSS radio occultation data produced by Spire

Quarterly Journal of the Royal Meteorological Society, 2020
AbstractOver recent years there has been increasing interest from commercial companies to produce observations of the atmosphere using GNSS‐RO (Global Navigation Satellite System – Radio Occultation) techniques. One such company, Spire, has achieved this by launching a large number of cubesats that operate in a constellation to observe the atmosphere ...
openaire   +1 more source

(Near-)real-time orbit determination for GNSS radio occultation processing

GPS Solutions, 2012
The processing of GPS radio occultation measurements for use in numerical weather predictions requires a precise orbit determination (POD) of the host satellite in near-real-time. Making use of data from the GRAS instrument on Metop-A, the performance of different GPS ephemeris products and processing concepts for near-real-time and real-time POD is ...
Montenbruck, Oliver, Hauschild, André, Andres, Yago, von Engeln, Axel, Marquardt, Christian   +4 more
openaire   +1 more source

Advancement of GNSS Radio Occultation Retrieval in the Upper Stratosphere

2004
Radio occultation (RO) observations promise to become a valuable basis for global climatologies of refractivity, temperature, geopotential height, and humidity in the near future. The continuous RO data stream from the CHAMP and SAC-C missions enables to create such climatologies for the first time.
A. Gobiet, G. Kirchengast
openaire   +1 more source

GNSS radio occultation data for weather forecast and climate research

The GNSS radio occultation (RO) technique uses GNSS (Global Navigation Satellite Systems) signals received aboard low Earth orbiting satellites for atmospheric limb sounding. Refractivity and temperature profiles are derived with high vertical resolution.
Schmidt, Torsten, Schreiner, Patrick Alexander, Wickert, Jens   +2 more
openaire   +5 more sources

Sensitivity of GNSS radio occultation data to horizontal variability in the troposphere

Physics and Chemistry of the Earth, Parts A/B/C, 2004
Abstract We addressed the sensitivity of Global Navigation Satellite System (GNSS) radio occultation (RO) measurements to atmospheric horizontal variability based on realistically simulated data. Retrieved parameters from refractivity via pressure, and geopotential height to dry temperature were investigated.
Ulrich Foelsche, Gottfried Kirchengast
openaire   +1 more source

Effect of GNSS radio occultation observations on the prediction of the 2021 Henan rainstorm

GPS Solutions, 2023
Shuanggen Jin
exaly  

GNSS Radio Occultation Sensors on Nanosatellites

2023
openaire   +1 more source

Evaluation of Tropopause Height from Sentinel-6 GNSS Radio Occultation Using Different Methods

Remote Sensing, 2023
Mohamed Zhran, Fahad Alshehri, Shuanggen Jin   +2 more
exaly  

Simulation of the GNSS-LEO radio occultation generation and location

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE), 2012
null Jueyao Wang, null Jing Zheng
openaire   +1 more source

A Machine Learning Approach for Air-Quality Forecast by Integrating GNSS Radio Occultation Observation and Weather Modeling

Atmosphere, 2023
Shengyu Kang, Yueqiang Sun, Yuhe Wang
exaly