Bias Analysis of CryoSat-2 Level 2 Products in SARIn Mode over Inland Water
Abstract We obtain lake elevations on the Tibetan plateau and Tianshan using CryoSat-2 baseline C level 2 products(SIR_SIN_L2I) in SARIn mode and with ICESat level 2 products, finding a bias of tens of meters between them. The bias must be removed before joint analysis of multi-mission data. Using classic waveform retracking method, the new elevation measurements are obtained from CryoSat-2 L1b products in SARIn mode. Results show that waveform retracking can remove the bias. We find that the bias is caused by a wrong window delay that is used during the production of the SARIn level 2 products. We conclude that current CryoSat-2 baseline C level 2 products in SARIn mode cannot be directly used in joint analysis of multi-mission data, and either waveform retracking or a bias correction should be added to level 2 products.
Key words :
SARIn
inland water
biases
waveform retracking
window delay
Cite this article:
MAO Song,SHEN Qiang,WANG Hansheng et al. Bias Analysis of CryoSat-2 Level 2 Products in SARIn Mode over Inland Water[J]. jgg, 2019, 39(5): 482-486.
MAO Song,SHEN Qiang,WANG Hansheng et al. Bias Analysis of CryoSat-2 Level 2 Products in SARIn Mode over Inland Water[J]. jgg, 2019, 39(5): 482-486.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2019/V39/I5/482
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