摘要:

The airborne multiband scatterometer DUTSCAT promises to become a useful tool for research in the field of active microwave remote sensing. The system can measure accurate σ ° values in six frequency bands simultaneously at a selected incidence angle and polarization. An evaluation of the use of this system for research in forestry, in particular the problems related with probing thick vegetation canopies, is given. The system can acquire information on the vertical distribution of backscattering. Through inversion of a multilevel model, σ ° of forests can be divided in contributions from a number of arbitrarily chosen layers ( three or four). A simple and accurate new approach for the computation of cc values for forests (or other thick vegetation covers) from scatterometer data is given and compared with the less accurate ‘ standard’ way of processing used for other types of targets.

ISSN:0143-1161    

DOI:10.1080/01431168708954809

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

An airborne scatterometer system operating at six frequencies simultaneously between 1 and 18 GHz has been developed for the measurement of the microwave scattering of vegetation, forests, sea and other targets. After a description of the instrument, some C- and L-band results are presented.

ISSN:0143-1161    

DOI:10.1080/01431168708954810

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

A combined noise scatterometer/ radiometer operating in the C-band is described. The radiometer is of the noise-injection type, achieving a high degree of accuracy and stability (better than 0-5 deg K.). The noise scatterometer is based on design techniques normally only found in the realm of radiometers, and, through this, extraordinary stability is ensured ( better than 003dB). The instrument is intended for precise comparison of brightness temperatures and backscatter coefficients.

ISSN:0143-1161    

DOI:10.1080/01431168708954811

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor