Quantitative evaluation of observation capability of GF-1 wide field of view sensors for soil moisture inversion

Nengcheng Chen; Jizhen Li; Xiang Zhang

doi:10.1117/1.JRS.9.097097

14 January 2015 Quantitative evaluation of observation capability of GF-1 wide field of view sensors for soil moisture inversion

Nengcheng Chen, Jizhen Li, Xiang Zhang

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 9, Issue 1, 097097 (January 2015). https://doi.org/10.1117/1.JRS.9.097097

Abstract

Currently, many satellite data are used to invert soil moisture. However, there is no study about quantitative evaluation of observation capability of GF-1 wide field of view (WFV) sensors for soil moisture inversion. Therefore, we proposed a method to evaluate it. We used WFV, Landsat8 Operational Land Imager (OLI), and Moderate-resolution Imaging Spectroradiometer (MODIS) data to invert soil moistures in Wuhan from September 2013 to September 2014 based on the Perpendicular Drought Index (PDI) and modified PDI (MPDI). From the estimated results, the R² values, and standard error, we found that both the PDI and MPDI had a significantly negative linear correlation with soil moisture (P<0.01). Through the values of R, mean absolute error, mean relative error, and root mean square error, we found that a strong relativity existed between the estimated and observed soil moistures. It was evident from the results for the WFV, OLI, and MODIS that the performances of WFV and OLI were consistent and that WFV performed better than MODIS. All the results indicated that WFV sensors had a high observation capability for soil moisture inversion in Wuhan. The comprehensive evaluation results for the performance of the PDI and MPDI proved that the MPDI performed better for soil moisture inversion than did the PDI.

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Nengcheng Chen, Jizhen Li, and Xiang Zhang "Quantitative evaluation of observation capability of GF-1 wide field of view sensors for soil moisture inversion," Journal of Applied Remote Sensing 9(1), 097097 (14 January 2015). https://doi.org/10.1117/1.JRS.9.097097

Published: 14 January 2015

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