Boeing 702
The Boeing 702 is a satellite bus for communication satellites. On the basis of this design, Boeing Satellite Systems manufactures various payloads for the end customer that are tailored to the respective requirements.
The design of the Boeing 702 is compatible with various launch systems, for example it can be launched with the launchers Delta IV , Atlas V , Ariane 5 , Proton M and Zenit 3 . It was presented in October 1995 and is based on the previous models Boeing 601 and 601HP. In 2009 the improved version 702B was presented.
The satellites were often afflicted with production errors, which is why there were frequent disputes with Boeing and the satellite operators. At the fall Anik F1 went Telesat Canada to court. The affected satellites are: Galaxy 11 , Thuraya 1 , PAS 1R , Anik F1, XM 1 , XM 2 , Intelsat 33e and ViaSat 2 . With Intelsat 29e occurred in April 2019 a fuel leak and consequently the destruction of the satellite.
Technical specifications
The satellite can generate up to 18 kW of power with the help of gallium arsenide solar cell surfaces. It can carry up to 118 high-performance transponders (94 active and 24 in reserve).
The satellites of the type 702MP have a height of 5.8 m to 8.6 m in orbit, a width with antennas of 9.2 m and solar cell surfaces with a span between 36.9 m and 38.1 m. When launched, the satellites are 5.8 m × 3.6 m × 3.1 m. The launch mass is between 5800 kg and 6160 kg, the mass in orbit after the launch between 3582 kg and 3833 kg. The solar cells deliver 13.6 and 18 kW (BOL) and are supported by lithium-ion batteries with 24 to 40 cells and a capacity of up to 236 Ah.
XIPS
As part of the design, Boeing is offering an ion propulsion system called XIPS ( Xenon Ion Propulsion System ). XIPS is about 10 times more effective than liquid fuel systems at maintaining a geostationary satellite orbit . A satellite equipped with this drive only needs around five kg of fuel per year for orbit control . According to Boeing, this is a fraction of what conventional propulsion systems require, and XIPS can also be used to reach the final orbital position, which would result in further fuel and mass savings.
This is realized by the new type 702SP, which also uses an ion thruster as an apogee motor .
By using ion propulsion as an apogee motor, these satellites are said to have only 33% to 50% of the weight of a satellite of the same power with a liquid fuel apogee motor. However, it takes a few months to raise the perigee to reach the GEO .
A typical 702SP satellite should weigh around 1.8 tons at launch and have an electrical output of 3 to 8 kW.
Mission list
| satellite | Bus version | Orderer | Year of appointment | Start date ( UTC ) | Launcher | COSPAR name | Remarks |
|---|---|---|---|---|---|---|---|
| Galaxy 11 | BSS-702 | PanAmSat | 1997 | 12/22/1999, 12:50 AM | Ariane 44L | 1999-071A | Shortened service life due to faults in the solar cells |
| Thuraya 1 | BSS-702 GEM | Thuraya | 1997 | 10/21/2000, 05:51 | Zenit 3SL | 2000-066A | Shortened service life due to faults in the solar cells |
| PAS 1R | BSS-702 | PanAmSat | 1997 | 11/16/2000, 01:07 | Ariane 5G | 2000-072A | Shortened service life due to faults in the solar cells |
| PAS 9 | BSS-702HP | PanAmSat | 1997 | 06/15/2002, 10:39 pm | Zenit 3SL | 2002-030A | |
| Thuraya 2 | BSS-702HP GEM | Thuraya | 1997 | 06/10/2003, 1:55 pm | Zenit 3SL | 2003-026A | |
| Anik F1 | BSS-702 | Telesat Canada | 1998 | 11/21/2000, 11:56 PM | Ariane 44L | 2000-076A | Shortened service life due to faults in the solar cells |
| XM 2 | BSS-702 | XM Satellite Radio | 1998 | 03/18/2001, 10:33 pm | Zenit 3SL | 2001-012A | Shortened service life due to faults in the solar cells |
| XM 1 | BSS-702 | XM Satellite Radio | 1998 | May 8, 2001, 10:10 am | Zenit 3SL | 2001-018A | Shortened service life due to faults in the solar cells |
| APMT 1 | BSS-702 GEM | APMT | 1998 | Not started | CZ-3B (planned) |
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|
Contract was terminated in April 1999 , because Hughes was unable to obtain the necessary export licenses |
| APMT 2 | BSS-702 GEM | APMT | 1998 | Not started | CZ-3B (planned) |
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|
Contract was terminated in April 1999 , because Hughes was unable to obtain the necessary export licenses |
| Spaceway 1 | BSS-702HP | DirecTV | 1999 | April 26, 2005 , 7:31 am | Zenit 3SL | 2005-015A | |
| Spaceway 2 | BSS-702HP | DirecTV | 1999 | 16.11.2005, 23:46 | Ariane 5 ECA | 2005-046B | |
| Spaceway 3 | BSS-702HP | Hughes Network Systems | 1999 | 08/14/2007, 11:44 pm | Ariane 5 ECA | 2007-036A | |
| Anik F2 | BSS-702HP | Telesat Canada | 2000 | 07/18/2004, 12:44 am | Ariane 5G + | 2004-027A | |
| NSS 8 | BSS-702HP | SES New Skies | 2001 | 30.01.2007, 23:22 | Zenit 3SL | 2007-F01 | False start, rocket exploded while taking off |
| WGS-1 | BSS-702HP | US Air Force | 2002 | 10/11/2007, 12:22 AM | Atlas V (421) | 2007-046A | |
| Thuraya 3 | BSS-702HP GEM | Thuraya | 2002 | January 15, 2008, 11:49 am | Zenit 3SL | 2008-001A | |
| WGS-2 | BSS-702HP | US Air Force | 2002 | 04/04/2009, 12:31 am | Atlas V (421) | 2009-017A | |
| WGS-3 | BSS-702HP | US Air Force | 2002 | 06/12/2009, 01:47 | Delta IV M + (5.4) | 2009-068A | |
| XM 3 | BSS-702HP | XM Satellite Radio | 2003 | 03/01/2005 , 3:51 am | Zenit 3SL | 2005-008A | |
| XM 4 | BSS-702HP | XM Satellite Radio | 2003 | 10/30/2006, 11:49 pm | Zenit 3SL | 2006-049A | |
| DirecTV-10 | BSS-702HP | DirecTV | 2004 | 07/07/2007, 1:16 am | Proton-M / Bris-M | 2007-032A | |
| DirecTV-11 | BSS-702HP | DirecTV | 2004 | 19.03.2008, 22:48 | Zenit 3SL | 2008-013A | |
| DirecTV-12 | BSS-702HP | DirecTV | 2004 | 12/29/2009 , 12:22 am | Proton-M / Bris-M | 2009-075A | |
| WGS-4 | BSS-702HP | US Air Force | 2006 | January 20, 2012, 12:38 am | Delta IV M + (5.4) | 2012-003A | |
| WGS-5 | BSS-702HP | US Air Force | 2006 | 05/25/2013 , 12:27 AM | Delta IV M + (5.4) | 2013-024A | |
| SkyTerra-1 | BSS-702HP GEM | Ligado Networks | 2006 | 11/14/2010, 5:29 pm | Proton-M / Bris-M | 2010-061A | |
| SkyTerra-2 | BSS-702HP GEM | Ligado Networks | 2006 | Not started |
Proton-M / Bris-M (planned) |
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|
Status unclear, probably in MEXSAT-2 converted |
| MSV SA | BSS-702HP GEM | Ligado Networks | 2006 | Not started | ? |
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Contract was terminated |
| WGS-6 | BSS-702HP | US Air Force | 2007 | 08/08/2013 , 12:29 AM | Delta IV M + (5.4) | 2013-041A | |
| Intelsat 22 | BSS-702MP | Intelsat | 2009 | 03/25/2012, 12:10 pm | Proton-M / Bris-M | 2012-011A | |
| Intelsat 21 | BSS-702MP | Intelsat | 2009 | 19/08/2012, 06:55 | Zenit 3SL | 2012-045A | |
| Intelsat 27 | BSS-702MP | Intelsat | 2010 | 02/01/2013, 06:56 | Zenit 3SL | 2013-F01 | False start, underperformance of the Blok-D upper level |
| Inmarsat-5 F1 | BSS-702HP | Inmarsat | 2010 | December 8th, 2013, 12:12 pm | Proton-M / Bris-M | 2013-073A | |
| Inmarsat-5 F2 | BSS-702HP | Inmarsat | 2010 | 02/01/2015, 12:31 | Proton-M / Bris-M | 2015-005A | |
| MEXSAT-1 | BSS-702HP GEM | SCT | 2010 | 05/16/2015, 05:47 | Proton-M / Bris-M | 2015-F01 | False start, error in the third stage |
| Inmarsat-5 F3 | BSS-702HP | Inmarsat | 2010 | 08/28/2015, 11:44 am | Proton-M / Bris-M | 2015-042A | |
| MEXSAT-2 | BSS-702HP-GEM | SCT | 2010 | October 2nd, 2015, 10:28 am | Atlas V (421) | 2015-056A | |
| WGS-7 | BSS-702HP | US Air Force | 2011 | 07/24/2015, 00:07 | Delta IV M + (5.4) | 2015-036A | |
| WGS-8 | BSS-702HP | US Air Force | 2011 | 01/27/2016, 11:20 pm | Delta IV M + (5.4) | 2016-075A | |
| Eutelsat 115 West B. | BSS-702SP | Eutelsat | 2012 | 02.03.2015, 03:50 | Falcon 9 v1.1 | 2015-010B | Start together with ABS 3A |
| ABS 3A | BSS-702SP | Asia Broadcast Satellite | 2012 | 02.03.2015, 03:50 | Falcon 9 v1.1 | 2015-010A | Started together with Eutelsat 115 West B |
| Intelsat 29e | BSS-702MP | Intelsat | 2012 | 01/27/2016, 11:20 pm | Ariane 5 ECA | 2016-004A | |
| SES-9 | BSS-702HP | SES World Skies | 2012 | March 4th 2016, 11:35 pm | Falcon 9 v1.2 | 2016-013A | |
| Eutelsat 117 West B. | BSS-702SP | Eutelsat | 2012 | 06/15/2016, 2:29 pm | Falcon 9 v1.2 | 2016-038B | Start together with ABS 2A |
| ABS 2A | BSS-702SP | Asia Broadcast Satellite | 2012 | 06/15/2016, 2:29 pm | Falcon 9 v1.2 | 2016-038A | Start together with Eutelsat 117 West B |
| WGS-9 | BSS-702HP | US Air Force | 2012 | 03/19/2017, 12:18 am | Delta IV M + (5.4) | 2017-016A | |
| WGS-10 | BSS-702HP | US Air Force | 2012 | 01/25/2019 (planned) | Delta IV M + (5.4) (planned) |
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Not started yet |
| Intelsat 33e | BSS-702MP | Intelsat | 2013 | 08/24/2016, 10:16 pm | Ariane 5 ECA | 2016-053A | |
| Inmarsat-5 F4 | BSS-702HP | Inmarsat | 2013 | 05/15/2017, 23:21 | Falcon 9 v1.2 | 2017-025A | |
| ViaSat-2 | BSS-702HP | Viasat | 2013 | 06/01/2017, 11:45 PM | Ariane 5 ECA | 2017-029A | |
| Intelsat 37e | BSS-702MP | Intelsat | 2013 | 09/29/2017, 9:56 pm | Ariane 5 ECA | 2017-060A | |
| Horizons 3e | BSS-702MP | Intelsat, JCSat | 2013 | 09/25/2018, 10:38 pm | Ariane 5 ECA | 2018-074B | |
| Intelsat ?? | BSS-702MP | Intelsat | 2013 | ? | ? |
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Not started yet |
| Intelsat 35e | BSS-702MP | Intelsat | 2014 | 07/05/2017, 11:38 pm | Falcon 9 v1.2 | 2017-041A | |
| SES-15 | BSS-702SP | SES World Skies | 2015 | May 18, 2017, 11:54 am | Soyuz-ST / Fregat-M | 2017-026A | |
| Silkwave 1 | BSS-702MP | CMMB Vision Holdings | 2015 | Before 2020 (planned) | ? |
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Not started yet |
| ABS 8 | BSS-702SP | Asia Broadcast Satellite | 2015 | 201x (planned) | Falcon 9 v1.2 (planned) |
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Status unclear |
| AMOS 17 | BSS-702MP | Spacecom Ltd. | 2016 | 2019 (planned) | Falcon 9 v1.2 (planned) |
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Not started yet |
| GiSAT 1 | BSS-702MP | Global IP | 2016 | 4th quarter 2018 (planned) | Falcon 9 v1.2 (planned) |
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Not started yet |
| JCSat-18 / Kacific 1 | BSS-702MP | JCSat , Kacific BS Ltd. | 2017 | 2019 (planned) | Falcon 9 v1.2 (planned) |
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|
Not started yet |
Web links
- Boeing factsheet in the web archive ( Memento from February 16, 2013 in the Internet Archive )
- Aerospace Technology (English)
- Hughes / Boeing: HS-702 / BSS-702, HS-GEM / BSS-GEM (Geomobile) at Gunter’s Space Page (English).
Individual evidence
- ↑ Stephen Clark: Electric propulsion could launch new commercial trend , Spaceflight now, March 19, 2012
- ↑ NSS 8 at Gunter's Space Page (English).
- ↑ Zenit-3SL (2) at Gunter's Space Page (English).
- ↑ MEXSAT 1, 2 (Centenario, Morelos 3) at Gunter’s Space Page (English).
- ↑ Stephen Clark: Launch Schedule (English).
- ↑ a b BSS-702 at Gunter's Space Page (English).
- ↑ Silkwave 1 (NYBBSat 1) at Gunter's Space Page (English).
- ↑ ABS 8 at Gunter's Space Page (English).
- ↑ AMOS 17 at Gunter's Space Page (English).
- ↑ GiSAT 1 in Gunter's Space Page (English).
- ↑ JCSat 18 / Kacific 1 at Gunter's Space Page (English).