摘要:

The proposals submitted to the United Nations General Assembly for the establishment of an international satellite monitoring agency are briefly discussed in the light of suggestions to combine surveillance tasks with socioeconomic (resources management) tasks. It is concluded that confidence building, both with regard to peacekeeping and crisis management on one side, and international co-operation for socioeconomic development on the other side, as well as systems characteristics for the various objectives, call for keeping these tasks completely separated.

ISSN:0143-1161    

DOI:10.1080/01431168408948826

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

An inexpensive pocket computer was programmed to calculate target reflectances and related statistics from radiometer measurements. The use of a programmable pocket computer can ensure that reliable data have been collected while the measurement team is still in the field.

ISSN:0143-1161    

DOI:10.1080/01431168408948827

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The opportunity to report the results of trials of new radar processors in really heavy seas is strictly limited. This paper gives a series of display photographs using a log-log receiver in a pair of pieces of otherwise conventional coastal surveillance equipment during severe gales in January 1983.

ISSN:0143-1161    

DOI:10.1080/01431168408948828

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The validity of using data from the Advanced Very High Resolution Radiometer (AVHRR) of the satellites NOAA-6 and NOAA-7 for land cover mapping is assessed by making comparisons with much higher resolution LANDSAT multi-spectral scanner (MSS) data. Near synchronous data for both systems are analysed for test sites in the Imperial Valley, California, the Nile Delta, and southern Italy. The results strongly indicate that despite the very coarse resolution of the AVHRR data compared with conventional MSS data they are sufficiently strongly correlated to suggest that the former have significant potential for land cover mapping, especially at small scales and for large areas. Hence the outstanding benefits of AVHRR data, namely their high temporal frequency, relative cheapness and low data volumes for image processing, may readily be taken advantage of for such tasks.

ISSN:0143-1161    

DOI:10.1080/01431168408948829

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Radiance reflected or emitted from a ground target exhibits an angular anisotropy which is wavelength dependent. While some empirical or modelling corrections may be made to reduce the impact of systematic effects upon target discrimination, no correction may be made for random variations in ground reflectance or emittance, nor for random variations in irradiance on the ground (optical reflective case) and in atmospheric transmission and backscallcr. A simple case in the optical-reflective region is considered, in order to demonstrate the dependence on scan angle (for a given Sun angle) of the effect of random variations on the discriminability of two ground targets partly obscured by a varying amount of unresolved cloud.

ISSN:0143-1161    

DOI:10.1080/01431168408948830

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Multispectral thermal infrared imagery has been acquired during a night-time airborne survey in Southern California. The imagery emphasizes emissivity variations of the surface rocks. Comparison with the available geological data indicates that such imagery can be a useful tool in the revision and refinement of geological maps.

ISSN:0143-1161    

DOI:10.1080/01431168408948831

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor