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1. chinaXiv:201703.00252 [pdf]

AN UNFOCUSED SAR APPROACH TO IMPROVE AZIMUTH RESOLUTION OF DUAL-FREQUENCY POLARIZED SCATTEROMETER(DFPSCAT)

Gang Wang; Xiaolong Dong; Qingliu Bao; Di Zhu; Xingou Xu
Subjects: Geosciences >> Space Physics

For the spaceborne scanning pencil-beam scatterometer, the azimuth resolution is low that could not meet the demands. Based on the motion of platform and the scanning rules of the spaceborne scatterometer, this paper takes an unfocused SAR approach to improve the Azimuth Resolution.

submitted time 2017-03-10 Hits890Downloads508 Comment 0

2. chinaXiv:201605.00289 [pdf]

AN UNFOCUSED SAR DESIGN TO IMPROVE AZIMUTH RESOLUTION OF DUALFREQUENCY FULL-POLARIZED SCATTEROMETER

Wang, Gang; Dong, Xiaolong; Bao, Qingliu; Zhu, Di; Xu, Xingou
Subjects: Geosciences >> Space Physics

In order to satisfy a high resolution for the measurement of snow water equivalent, we use the system of using the dual frequency(X-band 9.6GHz and Ku-band 17GHz) and full polarization. This paper discusses the various system options(scanning pencil-beam, high PRF, high SNR) and tradeoffs considered for improving the azimuth resolution of scatterometer are required.

submitted time 2016-05-03 Hits1566Downloads939 Comment 0

3. chinaXiv:201605.00288 [pdf]

THEORETICAL AND EXPERIMENTAL ANALYSIS OF SPATIAL DECORRELATION OF DOPPLER SCATTEROMETER

Bao, Qingliu; Dong, Xiaolong; Zhu, Di; Xu, Xingou
Subjects: Geosciences >> Space Physics

Ocean surface current is a very important parameter of ocean dynamic environment, which has been connected to global climate change, marine environment forecasting, marine navigation, engineering security and so on. Doppler scatterometer is a new type of scatterometer that can be used to measure ocean surface current as well as the ocean wind vector in space. The Doppler Scatterometer is based on a real aperture radar, which can achieve a very wide swath. It can provide the ocean surface current and wind vector information in a certain resolution and achieve global coverage quickly, which is very important for the marine environment forecasting and climate changes research.

submitted time 2016-05-03 Hits1035Downloads631 Comment 0

4. chinaXiv:201605.00285 [pdf]

A DEMONSTRATION EXPERIMENT OF AN NEW-GENERATION AIRBORNE ALTIMETER IN-SITU ABSOLUTE CALIBRATION SUITE

Xu, Xi-Yu; Ke, Xu; Hua, Shen; Wang, Zhen-Zhan; Liu, Ya-Long
Subjects: Geosciences >> Space Physics

An airborne delay Doppler altimeter was flown in autumn 2014. A calibration suite including a GNSS buoy, two tide gauges and two GPS stations were established. An experiment was carried out to test the GNSS buoy as a whole under dynamic ocean condition, to validate its performance and accuracy via the inter-comparison of tide gauges, and to demonstrate the altimetry calibration methods and to estimate the altimeter system bias. This paper presented some methods and results. The GNSS buoy system was proven to have the ability of measuring the sea surface height within 1cm, and the altimeter system bias had a consistency of centimeter level.

submitted time 2016-05-03 Hits622Downloads381 Comment 0

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