Evidence of hot spot directional signature from airborne POLDER measurements

被引：37

作者：

Breon, FM

Vanderbilt, V

Leroy, M

Bicheron, P

Walthall, CL

Kalshoven, JE

机构：

[1] NASA,AMES RES CTR,MOFFETT FIELD,CA 94035

[2] CNRS,CNES,UMR,UPS,CTR ETUD SPATIALES BIOSPHERE,F-31055 TOULOUSE,FRANCE

[3] ARS,USDA,REMOTE SENSING & MODELING LAB,BELTSVILLE,MD 20705

[4] NASA,GODDARD SPACE FLIGHT CTR,TERR PHYS LAB 924,GREENBELT,MD 20771

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1997年 / 35卷 / 02期

关键词：

BIDIRECTIONAL REFLECTANCE; FOREST CANOPIES; VEGETATION CANOPIES; PHYSICAL MODEL; LEAF CANOPIES; INVERSION; DISTRIBUTIONS; VALIDATION; ASAS;

D O I：

10.1109/36.563289

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The POLDER instrument was down during the BOREAS experiment over various sites and at various altitudes in the canadian boreal forest and other nearby targets. The instrument design permits the acquisition of the directional signature of any surface cover. In particular, the high directional resolution of POLDER allows it to measure, with an unprecedented accuracy, the hot spot signature of natural targets. In this paper we present some typical examples of such highly anisotropic reflectance directional signatures. The ratio of the maximum reflectance (hot spot direction) to the minimum reflectance (broad area in the forward scattering hemisphere) varies with wavelength and canopy. It can be as large as six in the visible and three in the near IR.

引用

页码：479 / 484

页数：6

共 31 条

[1] A SIMPLE ANALYTICAL FUNCTION FOR BIDIRECTIONAL REFLECTANCE [J].