Longshaw T G
Appl Opt. 1974 Jun 1;13(6):1487-93. doi: 10.1364/AO.13.001487.
In response to the increasing concern for more introspective remote sensing programs from space platforms, a number of satellite programs have been initiated that have since provided a wealth of information for earth resource programs. Application of these data has generated widespread interest in ground truth studies with photographic aerial remote sensing techniques playing a major role. Such investigations have motivated increasing interest in the radiometric concepts involved, in particular, the reflected radiance of objects appearing in a ground scene. The intention of this paper is to present application problems associated with some of the existing reflectance data and point out the geometrical considerations necessary for field spectroscopy. Definitions of reflectance eminating from the quadravariate reflectance distribution function [E. W. Ginsberg, T. Limperis, F. E. Nicodemus, and J. C. Richmond, "Infrared Radiometry Instrument Calibrations and Precision Measurements," University of Mic higan Engineering Summer Conference (June 1969)] are described, and attention is drawn to the compromise between measurement complexity and application limitations. In this context a field spectroradiometric system is described, and results from an application of the system to remote sensing of rock types are presented.
针对对来自太空平台的更具内省性的遥感计划日益增长的关注，已经启动了一些卫星计划，这些计划此后为地球资源计划提供了丰富的信息。这些数据的应用引发了对地面实况研究的广泛兴趣，其中摄影航空遥感技术发挥了主要作用。此类调查激发了人们对所涉及的辐射测量概念的越来越浓厚的兴趣，特别是对地面场景中出现的物体的反射辐射率的兴趣。本文旨在介绍与一些现有反射率数据相关的应用问题，并指出野外光谱学所需的几何考虑因素。描述了从四变量反射率分布函数[E. W. 金斯伯格、T. 林佩里斯、F. E. 尼科迪默斯和J. C. 里士满，“红外辐射测量仪器校准和精密测量”，密歇根大学工程夏季会议（1969年6月）]得出的反射率定义，并提请注意测量复杂性与应用局限性之间的折衷。在此背景下，描述了一种野外光谱辐射测量系统，并展示了该系统在岩石类型遥感中的应用结果。
