在光学薄大气条件下将陆地卫星数字计数值与地面反射率相关联。

Relating Landsat digital count values to ground reflectance for optically thin atmospheric conditions.

作者信息

Richardson A J

出版信息

Appl Opt. 1982 Apr 15;21(8):1457-64. doi: 10.1364/AO.21.001457.

DOI:10.1364/AO.21.001457

PMID:20389873

Abstract

The data from seven separate investigations that relate corrected Landsat digital count (DCc) values to ground-measured bidirectional reflectance R were summarized and examined as a single data set. As shown in the results these seven different sources of data were in significant agreement in estimating R from DCc. Thus a simplified linear formulation was derived for estimating R (0-100%) from Landsat DCc for conditions that approximate optically thin atmospheres. The relations are R4 = -5.9 + 0.476DCc4, R5 = -1 94 + 0.373DCc5, R6 = -1.40 + 0.412DCc6, and R7 = -0.49 + 1.220DCc7. The original Landsat digital count (DCo) data were corrected to a sun zenith angle of 39 degrees and for the 1/22/75-7/15/75 Landsat-2 calibration period to determine DCc.

摘要

对七项独立调查的数据进行了汇总和审查，这些数据将校正后的陆地卫星数字计数（DCc）值与地面测量的双向反射率R相关联，并将其视为一个单一数据集。结果表明，这七种不同的数据来源在从DCc估算R方面具有显著一致性。因此，针对近似光学薄大气的条件，推导了一个简化的线性公式，用于从陆地卫星DCc估算R（0 - 100%）。这些关系为：R4 = -5.9 + 0.476DCc4，R5 = -1.94 + 0.373DCc5，R6 = -1.40 + 0.412DCc6，以及R7 = -0.49 + 1.220DCc7。原始的陆地卫星数字计数（DCo）数据被校正到太阳天顶角为39度，并针对1975年2月22日至1975年7月15日的陆地卫星2校准期来确定DCc。