Abstract

A simple hand-held instrument has been designed and constructed to nondestructively estimate above-ground gramineous biomass using radiometric measurements. The prototype unit consists of a modified two-channel digital radiometer interfaced to a pocket calculator. A digital interface was constructed to join electronically and control the radiometer and calculator to enable the radiometer–calculator system to solve a linear conversion solution from radiometric units to estimated biomass. This instrument has been used to estimate radiometrically gramineous biomass in a more efficient fashion with a high degree of accuracy.

© 1976 Optical Society of America

Asymptotic nature of grass canopy spectral reflectance

Compton J. Tucker
Appl. Opt. 16(5) 1151-1156 (1977)

Spectral estimation techniques for the spectral calibration of a color image scanner

William K. Pratt and Clanton E. Mancill
Appl. Opt. 15(1) 73-75 (1976)

Filter radiometer: the selective interferometer

J. E. Harries and John Chamberlain
Appl. Opt. 15(11) 2667-2672 (1976)

Simple radiative transfer model for relationships between canopy biomass and reflectance

J. K. Park and D. W. Deering
Appl. Opt. 21(2) 303-309 (1982)

Solar irradiance: total and spectral and its possible variations

M. P. Thekaekara
Appl. Opt. 15(4) 915-920 (1976)