Paper Info
Title
Land Surface Albedo Estimation from Chinese HJ Satellite Data Based on the Direct Estimation Approach
Abstract
Monitoring surface albedo at medium-to-fine resolution (<100 m) has become increasingly important for medium-to-fine scale applications and coarse-resolution data evaluation. This paper presents a method for estimating surface albedo directly using top-of-atmosphere reflectance. This is the first attempt to derive surface albedo for both snow-free and snow-covered conditions from medium-resolution data with a single approach. We applied this method to the multispectral data from the wide-swath Chinese HuanJing (HJ) satellites at a spatial resolution of 30 m to demonstrate the feasibility of this data for surface albedo monitoring over rapidly changing surfaces. Validation against ground measurements shows that the method is capable of accurately estimating surface albedo over both snow-free and snow-covered surfaces with an overall root mean square error (RMSE) of 0.030 and r-square (R-2) of 0.947. The comparison between HJ albedo estimates and the Moderate Resolution Imaging Spectral Radiometer (MODIS) albedo product suggests that the HJ data and proposed algorithm can generate robust albedo estimates over various land cover types with an RMSE of 0.011-0.014. The accuracy of HJ albedo estimation improves with the increase in view zenith angles, which further demonstrates the unique advantage of wide-swath satellite data in albedo estimation.
Year
DOI
Venue
2015
10.3390/rs70505495
REMOTE SENSING
Field
DocType
Volume
Meteorology,Satellite,Remote sensing,Albedo,Mean squared error,Geology,Land cover,Image resolution,Satellite data,Radiometer,Zenith
Journal
7
Issue
ISSN
Citations 
5
2072-4292
3
PageRank 
References 
Authors
0.47
13
6
Name
Order
Citations
PageRank
Tao He1538.30
Shunlin Liang2611116.22
Dongdong Wang34011.93
xiaona chen442.52
danxia song530.47
bo jiang6427.73