Presents the best satellite constellation covering a specific area obtained though analyzing typical constellation designs of mobile satellite communication systems, for regional coverage, zonal coverage and global coverage,and using circular polar orbit or inclined circular orbit and proves that the zonal coverage satellite constellation design method considering relationship of the satellites phases between different orbits is well advanced.
Other problems such as signal structure,satellite position determination, area selection of regional coverage and the user's receiv-er are also discussed here.
Through 1: 500000 geochemical regional coverage in the East Kunlun, one of ma-jor prospecting regions in Qinghai, the distribution,disperson and enrichment of various ele-ments have been found out and the prospecting direction, target of mineral kinds and majorprospecting areas were defined. Furthermore,a lot of avalable geochemical data were provid-ed to resolve a certain fundmental geological problems in this region.
Furthermore, we show that given uniform pricing, the regulator may increase consumer surplus as well as profit by requiring a higher regional coverage than the market outcome.
Surface and ground water monitoring in Norway is designed to give a regional coverage with most of the stations in areas with acidification and some stations in unpolluted areas that give background values.
This paper discusses the designing features of the "global civil satellitenavigation and communication system" (CNS), which was proposed by the EuropeanSpace Agency(ESA) in 1987. A further discussion is given on the TD spread spectrumranging scheme and despread to improve the system. A calculation is made of transmittedpower, propagation attenuation, additional random attenuation due to ionospere, SNRand PE, and a comparison is also made with GPS C/A code. Furthermore, a reductionof the TD frame period sche...
Land evaluation in China during the recent years has been much broadened in terms of its regional coverage and research contents. The general land evaluations for agriculturar develop ved towards regional and local 3tudi.es The general land evaluations for agricultural develop ment have gradually moved towards individual studies for crops, forests and animal husbandry, or even more narrow purposes such as plantings of rubber, ordnge, tea and so on Land evaluations far nonagricutural purpos...
Through 1: 500000 geochemical regional coverage in the East Kunlun, one of ma-jor prospecting regions in Qinghai, the distribution,disperson and enrichment of various ele-ments have been found out and the prospecting direction, target of mineral kinds and majorprospecting areas were defined. Furthermore,a lot of avalable geochemical data were provid-ed to resolve a certain fundmental geological problems in this region. The method of small-scale regional geochemical coverage in the Ea...