EUTELSAT 117 West B also features a payload for Raytheon to enable the U.S. Federal Aviation Administration (FAA) to increase GPS signal accuracy from 10 metres to 1-2 metres, thereby enhancing aviation safety for users in Canada, Mexico, Puerto Rico and the continental United States including Alaska. The WAAS (Wide Area Augmentation System) payload on EUTELSAT 117 West B is the first to be included on an all-electric satellite.
The satellite was launched in June 2016, but it will take about seven months to transition from its initial insertion orbit to its final geo-stationary orbit:
EUTELSAT 117 West B’s electric propulsion system will now be prepared for orbit-raising that is scheduled to start on 18 June and last for approximately seven months. The satellite will then undergo in-orbit tests prior to commercial entry into service at 117° West in Q1 2017.
Cf.: http://news.eutelsat.com/pressreleases/ ... ce-1442707
Assuming all goes well, the FAA SBAS constellation of satellites will then grow to four. The orbital positions will then be:
98-W on Inmarsat-4 F3
107.3-W on Anik F1R
117-W on EUTELSAT 177 West B
133-W on Galaxy 15
This gives about 10-degree longitude spacing over the lower-48 states, and then 133-W for Hawaii and Alaska coverage. Having four satellites in the WAAS SBAS constellation should increase availability. The 117-W location should also give Alaska (and other far Northwest users) added redundancy in coverage at better look angles.
The description of "electric propulsion" refers to use of an ion-drive instead of chemical propellants. The Boeing-built satellite is quite interesting. Read more at
http://spaceflight101.com/falcon-9-eute ... 17-west-b/
The name Satmex 9 is also used to describe this satellite. This is apparently a reference used by the satellite operating company SATMEX, which was taken over by EUTELSAT in 2014.
A "hosted payload" means the satellite operator, usually a commercial company, agreed to take along someone else's gear on the space vehicle. The hosted payload fits onto the satellite platform, uses the electrical power of the satellite system, and possibly some of the communication faciliteis of the satellite, but performs its own function, separate from the satellite's primary payload. It is quite common for commercial operators of satellites in geostationary earth orbit to offer this service, particularly to government customers. All the WAAS signals-in-space segment transponders are hosted payloads aboard commercial GEO satellites operated by private companies.