1、 STD-ITU-R RECMN SA.102q-L-ENGL 1997 = 4855212 0530bYl 9.50 D RC. ITU-R SA.1024-1 1 RECOMMENDATION ITU-R SA. 1024- 1 NECESSARY BANDWIDTHS AND PREFERRED FREQUENCY BANDS FOR DATA TRANSMISSION FROM EARTH EXPLORATION SATELLITES (NOT INCLUDING METEOROLOGICAL SATELLITES) (Question IT-R 13917) (1 994- 1997
2、) The IT Radiocommunication Assembly, considering a) that sensors on Earth exploration satellites, currently operating or under development, produce data rates ranging fiom 2 kbis up to 1 Gbis; b) that, although on-board data compression techniques could allow a reduction of symbol rates, it may be
3、necessary to use error correcting coding techniques to achieve the performance objectives thus resulting in increased bandwidths; c) that several frequency bands are allocated to the Earth exploration-satellite (EES) service (space-to-Earth) and to the inter-satellite service for use by the EES serv
4、ice; 4 that the band 2 200-2 290 MHz is extensively utilized by space and terrestrial services; e) that transmission through the Earths atmosphere at frequencies above around 10 GHz is affected by rain; I) that additional EES systems requiring space-to-Earth data links are planned, some of which wil
5、l transmit higher resolution images, requiring high data rates resulting in bandwidths greater than can be accommodated in the 8 025-8 400 MHz band; g) that certain fbture EES systems will require both space-to-space links to data relay satellites and space-to-Earth data links near 26 GHz, recommend
6、 1 that Earth exploration-satellite space-to-Earth and space-to-space links requiring low data rates use assignments in the allocated bands below 2 300 MHz; 2 that Earth exploration-satellite space-to-Earth links requiring medium and high data rates use assignments in the 8 025-8 400 MHz band; 3 tha
7、t Earth exploration-satellite space-to-space links requiring high data rates use assignments in the 4 that Earth exploration-satellite space-to-Earth links requiring high data rates but with a possible reduction of transmission performance in case of rain use assignments in frequency bands above 25
8、GHz that qe allocated to the Earth exploration-satellite service; 5 that EES systems requiring wide bandwidth data relay satellite links as well as wide bandwidth direct-to-Earth links use assignments near 26 GHz. 25.25-27.5 GHz band; COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services
