Please make a donation to support Gunter's Space Page.
Thank you very much for visiting Gunter's Space Page. I hope that this site is useful and informative for you.
If you appreciate the information provided on this site, please consider supporting my work by making a simple and secure donation via PayPal. Please help to run the website and keep everything free of charge. Thank you very much.

ProtoStar 1 -> Intelsat 25

ProtoStar 1 -> Intelsat 25 [SSL]

China Telecommunications Broadcast Satellite Corporation (ChinaSat) has contracted with Space Systems/Loral for ChinaSat 8, a.k.a. ZX 8 (Zhongxing 8), a high-powered satellite that will provide video, data, and digital voice communications for China.

Space Systems/Loral (SS/L) designed and built ChinaSat 8, to launch and deliver it on orbit on a CZ-3B rocket in mid-1999, but export regulations delayed the launch. Eventually it might be launched on a non-chinese launch vehicle to avoid the export regulations. Otherwise it could be sold, if the export regulations can not be resolved.

Loral announced in February 2005 that it has reached a settlement with ChinaSat regarding the Space Systems/Loral-built ChinaSat 8 satellite and its launch. SS/L had no obligation to deliver the ChinaSat 8 satellite until all required export licenses are received. ChinaSat was to withdraw all claims filed against SS/L and release it from any related liabilities. Furthermore, ChinaSat has the right under the settlement to assign its rights in the satellite contract to a third party.

ProtoStar has signed in 2006 definitive agreements with China Telecommunications Broadcast Satellite Corporation to purchase a completed but un-launched satellite and with Space Systems/Loral, a subsidiary of Loral Space & Communications Inc., to tailor the satellite's components for the proposed footprint over Asia. ProtoStar expects to complete construction and launch the satellite, renamed ProtoStar I, in early 2008.

ProtoStar 1 carries 16 Ku-band channels at 125 watts per channel, and 36 C-band channels at 37 Watts each. ProtoStar 1 is a high-powered version of SS/L's three-axis, body-stabilized LS-1300 platform.

In October 2009 the satellite was sold in an auction to Intelsat after the ProtoStar venture succumbed to multiple frequency-coordination issues. The satellite was renamed Intelsat 25.

Nation: USA
Type / Application: Communication
Operator: ProtoStar
Contractors: Space Systems/Loral (SS/L)
Equipment: 16 (+6) Ku-band transponders, 36 (+2) C-band transponders
Configuration: LS-1300
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime: 17 years
Mass: 4100 kg
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
ProtoStar 1 -> Intelsat 25 (ex ZX 8, ChinaSat 8) 2008-034A 07.07.2008 Ko ELA-3 Ariane-5ECA with Badr 6

References:

Further ProtoStar missions:
Further ZX (ChinaSat) missions:
Further Intelsat missions: