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What are the parameters that affect DEM relative accuracy when generating DEM from satellite SAR images interferometry?

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Parameters affecting DEM relative accuracy in generating DEM from satellite SAR images interferometry include baseline estimation accuracy, coherence levels, atmospheric artifacts, and the perpendicular baseline length. Baseline estimation accuracy is crucial for precise DEM generation, with methods like using prior DEM information enhancing accuracy. Coherence levels impact DEM quality, with higher coherence values leading to more accurate elevation values. Addressing atmospheric artifacts through multi-baseline interferometric methods can significantly improve DEM accuracy. Additionally, the perpendicular baseline length plays a vital role, needing to be long for height sensitivity and short for spatial coherence. These parameters collectively influence the accuracy and reliability of DEMs derived from satellite SAR interferometry.

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Open access•Journal Article•DOI Baseline Estimation Using DEM Prior Knowledge and Capability Analysis for Gaofen-3 Repeat-Pass SAR Interferometry Lixiang Ma, Yue Wang, Qingjun Zhang, Yu Zhu, Zhang Yue, Mingming Bian - Show less +5 more 23 Apr 2019-IEEE Access 2 Citations	Parameters affecting DEM relative accuracy in SAR interferometry are baseline estimation accuracy and prior DEM information. Accurate baseline estimation enhances DEM precision, crucial for generating high-quality DEM from satellite SAR images.
Open access•Journal Article•DOI Modeling the Optimal Baseline for a Spaceborne Bistatic SAR System to Generate DEMs Shijin Li, Shubi Zhang, Tao Li, Yandong Gao, Qianfu Chen, Xiang Zhang - Show less +5 more 14 Feb 2020-ISPRS international journal of geo-information 3 Citations	Parameters affecting DEM relative accuracy in SAR interferometry include baseline length for phase sensitivity, spatial coherence for accuracy, and terrain slope for phase unwrapping error, as discussed in the paper.
Book Chapter•DOI Satellite Radar Interferometry for DEM Generation Using Sentinel-1A Imagery Chetna Soni, Arpana Chaudhary, Uma Sharma, Chilka Sharma - Show less +3 more 01 Jan 2021 4 Citations	Parameters affecting DEM relative accuracy in satellite SAR interferometry are coherence, baseline, wavelength, and temporal resolution. Coherence values above 0.5 correspond to elevation values close to SRTM DEM.
Proceedings Article•DOI DEM generation in cloudy-rainy mountainous area with multi-baseline SAR interferometry Hong'an Wu, Yonghong Zhang, Decai Jiang, Yonghui Kang - Show less +3 more 08 Mar 2018	Parameters affecting DEM relative accuracy in SAR interferometry are atmospheric artifacts, baseline configuration, and coherence. Multi-baseline InSAR with coherence-based weights improves accuracy in cloudy-rainy mountainous regions.
Open access•Journal Article•DOI Decorrelating Ambiguities in SAR Interferometry Through Slight PRI Variation 01 Jan 2022-IEEE Transactions on Geoscience and Remote Sensing 1 Citations	Parameters affecting DEM relative accuracy in SAR interferometry are azimuth ambiguities, phase biases, and coherence losses. PRI variation effectively decorrelates ambiguities, enhancing DEM quality without reducing swath width.

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