Results 21 to 30 of about 4,586 (165)

An Aircraft Wetland Inundation Experiment Using GNSS Reflectometry

Remote Sensing, 2020
In early May of 2017, a flight campaign was conducted over Caddo Lake, Texas, to test the ability of Global Navigation Satellite System-Reflectometry (GNSS-R) to detect water underlying vegetation canopies. This paper presents data from that campaign and
Stephen T. Lowe, Clara Chew, Jesal Shah, Michael Kilzer   +3 more
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Precision Bounds in GNSS-R Ocean Altimetry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014
Global navigation satellite systems (GNSS) signals offer a promising opportunity to perform mesoscale altimetry with worldwide coverage using small satellites. However, unlike the signals used in classical altimeters, the GNSS signals have smaller bandwidth and lower transmitted power.
Pascual Biosca, Daniel, Camps Carmona, Adriano José, Martínez Mindeguía, Francisco, Hyuk, Park, Alonso Arroyo, Alberto, Onrubia Ibáñez, Raúl   +5 more
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Leveraging the CYGNSS Spaceborne GNSS‐R Observations to Detect Ionospheric Irregularities Over the Oceans: Method and Verification

Space Weather, 2022
The Global Navigation Satellite System (GNSS) has significantly facilitated the detection of ionospheric irregularities. Nevertheless, the ground‐based GNSS stations are inhomogeneously distributed around the world with large gaps, especially in the vast
Xiaodong Ren, Hang Liu, Dengkui Mei, Pengxin Yang, Zhiyu Zhang, Mohamed Freeshah, Xiaohong Zhang   +6 more
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Snow monitoring using GNSS-R techniques

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
GNSS-R techniques are currently being studied to remotely sense a number of geophysical parameters over different types of surfaces [1-6]. The Interference Pattern Technique (IPT) is based on the measurement of the interference pattern of the GPS direct and reflected signals, after reflecting over the surface, as the GPS satellites move.
Nereida Rodriguez-Alvarez, Albert Aguasca, Enric Valencia, Xavier Bosch-Lluis, Isaac Ramos-Pérez, Hyuk Park 0001, Adriano Camps, Mercè Vall-Llossera   +7 more
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Retrieval of Ocean Surface Wind Speed Using Reflected BPSK/BOC Signals

Remote Sensing, 2020
The Global Navigation Satellite System (GNSS) has become a valuable resource as a remote sensing technique. In the past decade, the use of reflected GNSS signals for sensing the Earth, also known as GNSS reflectometry (GNSS-R), has grown rapidly.
Hao-Yu Wang, Jyh-Ching Juang
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Spaceborne GNSS Reflectometry

Remote Sensing, 2022
This article presents a review on spaceborne Global Navigation Satellite System Reflectometry (GNSS-R), which is an important part of GNSS-R technology and has attracted great attention from academia, industry and government agencies in recent years ...
Kegen Yu, Shuai Han, Jinwei Bu, Yuhang An, Zhewen Zhou, Changyang Wang, Sajad Tabibi, Joon Wayn Cheong   +7 more
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Study of Delay Drift in GNSS-R Altimetry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014
Differently to the case of a conventional spaceborne nadir-looking mono-static radar altimeter, where the fly-around time of the pulses remains basically constant (assuming an almost circular orbit around an almost spherical Earth), the bistatic geometry of GNSS-R with the transmitter and the receiver embarked on different satellites imprints a ...
Manuel Martín-Neira, Salvatore D'Addio, Raffaele Vitulli   +2 more
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Numerical Computation of the Electromagnetic Bias in GNSS-R Altimetry [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 2016
In radar altimetry, the electromagnetic (EM) bias is originated by the smaller reflectivity of wave crests than troughs; thus, the average sea surface height is underestimated. Bias uncertainty is currently the largest factor in altimetry error budgets.
Ghavidel, Ali, Schiavulli, Domenico, Camps Carmona, Adriano José   +2 more
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From GPS Receiver to GNSS Reflectometry Payload Development for the Triton Satellite Mission

Remote Sensing, 2021
The global positioning system (GPS) receiver has been one of the most important navigation systems for more than two decades. Although the GPS system was originally designed for near-Earth navigation, currently it is widely used in highly dynamic ...
Yung-Fu Tsai, Wen-Hao Yeh, Jyh-Ching Juang, Dian-Syuan Yang, Chen-Tsung Lin   +4 more
doaj   +1 more source

Spatial Resolution in GNSS-R Under Coherent Scattering [PDF]

IEEE Geoscience and Remote Sensing Letters, 2020
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