Results 51 to 60 of about 2,499 (207)

Detecting Targets above the Earth's Surface Using GNSS-R Delay Doppler Maps: Results from TDS-1 [PDF]

open access: yes, 2019
: Global Navigation Satellite System (GNSS) reflected signals can be used to remotely sense the Earth’s surface, known as GNSS reflectometry (GNSS-R). The GNSS-R technique has been applied to numerous areas, such as the retrieval of wind speed, and the
Benson, Craig   +5 more
core   +2 more sources

An Innovative Signal Processing Scheme for Spaceborne Integrated GNSS Remote Sensors

open access: yesRemote Sensing, 2023
The vigorous development of the global navigation satellite system (GNSS) has led to a boom in GNSS radio occultation (GNSS RO) and GNSS reflectometry (GNSS-R) techniques.
Tongsheng Qiu   +12 more
doaj   +1 more source

Remote sensing of tropospheric turbulence using GPS radio occultation [PDF]

open access: yes, 2016
Radio occultation (RO) measurements are sensitive to the small-scale irregularities in the atmosphere. In this study, we present a new technique to estimate tropospheric turbulence strength (namely, scintillation index) by analyzing RO amplitude ...
Ao, Chi, Shume, Esayas
core   +3 more sources

Cross-talk statistics and impact in interferometric GNSS-R [PDF]

open access: yes, 2016
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Alonso Arroyo, Alberto   +5 more
core   +2 more sources

First results of a GNSS-R experiment from a stratospheric balloon over boreal forests [PDF]

open access: yes, 2015
The empirical results of a global navigation satellite systems reflectometry (GNSS-R) experiment onboard the Balloon EXperiments for University Students (BEXUS) 17 stratospheric balloon performed north of Sweden over boreal forests show that the power of
Camps Carmona, Adriano José   +3 more
core   +2 more sources

Simulation of space-borne tsunami detection using GNSS-Reflectometry applied to tsunamis in the Indian Ocean [PDF]

open access: yes, 2010
Within the German-Indonesian Tsunami Early Warning System project GITEWS (Rudloff et al., 2009), a feasibility study on a future tsunami detection system from space has been carried out. The Global Navigation Satellite System Reflectometry (GNSS-R) is an
A. Helm   +4 more
core   +1 more source

Retrieval of temperature profiles from CHAMP for climate monitoring: intercomparison with Envisat MIPAS and GOMOS and different atmospheric analyses [PDF]

open access: yes, 2007
International audienceThis study describes and evaluates a Global Navigation Satellite System (GNSS) radio occultation (RO) retrieval scheme particularly aimed at delivering bias-free atmospheric parameters for climate monitoring and research.
Borsche, M.   +5 more
core   +3 more sources

Effect of Multiple GNSS Integration on the Number and Spatiotemporal Coverage of Radio Occultation Events

open access: yesAtmosphere, 2022
The development of global navigation satellite systems (GNSSs) and multi-system compatible radio occultation (RO) techniques provides favorable conditions and opportunities for increasing the number of occultation events and improving their ...
Congliang Liu   +6 more
doaj   +1 more source

Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultations [PDF]

open access: yes, 2015
Electron density profiles (EDPs) derived from GNSS radio occultation (RO) measurements provide valuable information on the vertical electron density structure of the ionosphere and, among others, allow the extraction of key parameters such as the maximum
ALTADILL David   +4 more
core   +4 more sources

Relatively Intense Daytime GNSS Amplitude Scintillations at Middle Latitude Linked With Multi‐Layered Strong Es Structures

open access: yesGeophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Intense Global Navigation Satellite System (GNSS) amplitude scintillations usually occur in nighttime at low latitudes due to ionospheric plasma bubble irregularities. During daytime at middle latitudes, previous studies found that the sporadic E (Es) layer could lead to GNSS amplitude scintillations, which however, is relatively weak, for ...
Wenjie Sun   +14 more
wiley   +1 more source

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