Unclassified

The wideband global SATCOM (WGS) system is currently operational in the Pacific Ocean using WGS1 (175E). GBS traffic is supported in that theater today using the digital video broadcast by satellite (DVB-S) and operates using terminals originally designed for operation using the UHF follow-on satellite (UFO8). These terminals can now operate over WGS1 and UFO8. GBS is planned to migrate to the joint IP modem (JIPM) in 2010. The JIPM will use the second generation DVB-S2 which represents a quantum leap in capability over DVB-S in terms of its power and bandwidth efficiency. Further, the JIPM allows hub-spoke operation between a control center at a Teleport and the remote terminals equipped with a remote modem. This paper will address the data rate performance of GBS terminals using the current DVB-S and the JIPM DVB-S2 over WGS1 (175E), WGS2 (60E) and WGS3 (12W). First, a reference link is defined based on the next generation receive terminal (NGRT). Next, data rates will be determined for the reference link based on measured WGS1 data. Finally, global availability maps will be determined for the reference link when operating over WGS1, WGS2, and WGS3 using WGS Ka-band beams.