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- W1975363237 abstract "Global mobile communication systems deployed in the 1990s (Iridium and Globalstar) failed to achieve the expected market success. However, recently a second generation of these two LEO constellations have been or will be procured. This shows evidence that global mobile satellite communications are attractive for a certain class of users. Basic requirements for mobile satellite communication networks are global coverage at high elevation angles, continuous availability and most important attractive service offers. For the first two reasons LEO constellations were designed and deployed. The large number of required satellites (remember the original Teledesic concept was designed containing 860 satellites) increases the CAPEX and consequently the service cost. This is probably the major reason for the limited commercial success of Iridium and Globalstar. An ideal global mobile (broadband) communication system shall provide global coverage at high elevation angles (not below e.g. 30°) with the lowest number of satellites. This seems to be contradictory. However, a solution will be presented that achieves global coverage which requires only five satellites and achieves high elevation angles even at polar locations. This orbit constellation is to be complemented with innovative payloads to achieve cost efficient broadband mobile services all over the Globe. Innovative L/S-band payload concepts will be introduced as well as Ka-band payloads." @default.
- W1975363237 created "2016-06-24" @default.
- W1975363237 creator A5052388963 @default.
- W1975363237 date "2010-04-01" @default.
- W1975363237 modified "2023-10-18" @default.
- W1975363237 title "A highly innovative global broadband mobile communication system concept" @default.
- W1975363237 cites W2048240752 @default.
- W1975363237 doi "https://doi.org/10.1016/j.actaastro.2009.09.032" @default.
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