A Novel Proposal of Gaofen-3 Satellite Constellation for Multi-Applications

Qiu, Xiaolan; Ding, Chibiao; Lei, Baiping; Han, Bing; Li, F.

doi:10.5194/isprs-archives-xlii-2-w7-635-2017

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…It has the ability of using its 12 imaging modes to scan swaths varying from 10 km to 650 km with a corresponding resolution varying from 1 m to 500 m [4]. The primary objective of GF-3 is to make multimode and high-resolution C-band data available for a wide spectrum of both scientific and civilization applications in such fields as ocean monitoring, disaster reduction, and water conservancy [6]. The GF-3 satellite was officially put into operation in January 2017.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of Time-Series InSAR Processing in Beijing Using a Small Stack of Gaofen-3 Differential Interferograms

Wang

Deng

et al. 2019

Journal of Sensors

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More and more synthetic aperture radar (SAR) satellites in orbit provide abundant data for remote sensing applications. In August 2016, China launched a new Earth observation SAR satellite, Gaofen-3 (GF-3). In this paper, we utilize a small stack of GF-3 differential interferograms to map land subsidence in Beijing (China) using the time-series SAR interferometry (InSAR) technique. The small stack of differential interferograms is generated with 5 GF-3 SAR images from March 2017 to January 2018. Orbit errors are carefully addressed and removed during differential InSAR (DInSAR) processing. Truncated singular-value decomposition (TSVD) is applied to strengthen the robustness of deformation rate estimation. To validate the results of GF-3 data, an additional deformation measurement using 26 Sentinel-1B images from March 2017 to February 2018 is carried out using the persistent scatterer interferometry (PSI) technique. By implementing a cross-comparison, we find that the retrieved results from GF-3 images and Sentinel-1 images are spatially consistent. The standard deviation of vertical deformation rate differences between two data stacks is 11.24 mm/y in the study area. The results shown in this paper demonstrate the reasonable potential of GF-3 SAR images to monitor land subsidence.

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Section: Introductionmentioning

confidence: 99%

Demonstration of Time-Series InSAR Processing in Beijing Using a Small Stack of Gaofen-3 Differential Interferograms

Wang

Deng

et al. 2019

Journal of Sensors

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“…Similar to the marine dynamic satellite constellation, China is also building a monitoring satellite constellation, which is expected to be completed in 2022 [86]. The main payload of that constellation is a 1 m resolution synthetic aperture radar.…”

Section: Development Trends Of Surveillance Satellites In Chinamentioning

confidence: 99%

Past, Present and Future Marine Microwave Satellite Missions in China

Lin

Jia

2022

Remote Sensing

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Over the past 60 years, China has made fruitful achievements in the field of ocean microwave remote sensing satellite technology. A long-term plan has now been formulated for the development of Chinese ocean satellites, as well as the construction of a constellation of ocean dynamic environmental and ocean surveillance satellites. These will gradually form China’s ocean monitoring network from space, thereby playing important roles in future ocean resource and environmental monitoring, marine disaster prevention and reduction, and global climate change. In this review manuscript, the developmental history of ocean microwave satellites and the development status of oceanic microwave remote sensing satellites in China are reviewed. In addition, China’s achievements in the field of oceanic microwave remote sensing satellite technology are summarized, and the future development of China’s ocean microwave remote sensing satellite program is analysed.

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“…It is the first fully C-band polarimetric SAR satellite in China and is capable of acquiring high-resolution and largewidth SAR images. It has been widely used in the application of ocean wind, ship detection, and terrain survey [14][15][16][17]. Wang et al, 2019 made an attempt to use only five Gaofen-3 SAR images to perform the land subsidence over Beijing using InSAR technology [18]-except that there is limited research and applications related to land subsidence monitoring based on Gaofen-3 SAR images via time series InSAR technology due to its imperfect interferometric performance.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Land Subsidence Deceleration in Beijing (China) by Gaofen-3 Time Series Interferometry

Han

Dai

et al. 2023

Remote Sensing

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Revealing the land subsidence in Beijing, China, induced by the massive groundwater extraction in the past three decades, is important to mitigate the hazards and protect the residences and infrastructure. Many SAR (Synthetic Aperture Radar) datasets have been successfully applied to reveal the land subsidence over Beijing in previous research, while few works were achieved on land subsidence revealed by time-series InSAR (Interferometric Synthetic Aperture Radar) with Gaofen-3 SAR images. In this study, we successfully perform the time-series InSAR analysis with Gaofen-3 SAR images to extract the land subsidence in Beijing from 2020 to 2021. The Sentinel-1 SAR images were used to assess the accuracy of Gaofen-3 images. The subsidence scale and extent are consistent in detected major subsidence bowls between the two datasets. The spatial–temporal evolution and the deceleration of Beijing land subsidence were revealed by comparing with the Sentinel-1 results from 2017 to 2020. Moreover, we evaluated the interferometric performance of Gaofen-3 satellite SAR imagery and analyzed the main factors that mostly influence the coherence and quality of interferograms. Our results proved that the long perpendicular baselines decrease the coherence seriously over the study area, and the artifacts induced by inaccurate orbit information reduce the quality of the Gaofen-3 interferograms. Refining and removing the two main artifacts could improve the quality of interferograms formed by Gaofen-3 SAR images.

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A Novel Proposal of Gaofen-3 Satellite Constellation for Multi-Applications

Cited by 8 publications

References 7 publications

Demonstration of Time-Series InSAR Processing in Beijing Using a Small Stack of Gaofen-3 Differential Interferograms

Demonstration of Time-Series InSAR Processing in Beijing Using a Small Stack of Gaofen-3 Differential Interferograms

Past, Present and Future Marine Microwave Satellite Missions in China

Revealing the Land Subsidence Deceleration in Beijing (China) by Gaofen-3 Time Series Interferometry

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