| Mission type | Communications |
|---|---|
| Operator | SES |
| COSPAR ID | 1988-109B |
| SATCATno. | 19688 |
| Website | https://www.ses.com/ |
| Mission duration | 12 years (planned) 16 years (achieved) |
| Spacecraft properties | |
| Bus | AS-4000 |
| Manufacturer | GE Astro Space (nowLockheed Martin Space Systems) |
| Launch mass | 1,768 kg (3,898 lb)[1] |
| Dimensions | 1.5 m x 1.7 m x 2.1 m (solar panels span of 19.3 m) |
| Power | 2.6kW[1] |
| Start of mission | |
| Launch date | 11 December 1988, 00:33:28UTC |
| Rocket | Ariane 44LP (V27) |
| Launch site | Centre Spatial Guyanais,ELA-2 |
| Contractor | Arianespace |
| Entered service | 5 February 1989 |
| End of mission | |
| Disposal | Graveyard orbit |
| Deactivated | December 2004 |
| Orbital parameters | |
| Reference system | Geocentric orbit[2] |
| Regime | Geostationary orbit |
| Longitude | 19.2° East (1989–2001) 19.4° East (2001) 5.2° East (2001–2004) |
| Transponders | |
| Band | 16Ku-band (45 watts) |
| Bandwidth | 26MHz |
| Coverage area | Western Europe |
Astra 1B → | |
Astra 1A was the firstsatellite launched and operated bySES (Société Européenne des Satellites), launched in December 1988. During its early days, it was often referred to as theAstra Satellite, asSES only operated one satellite originally. The satellite provided 16 transponders(+6 as rescue) and television coverage toWestern Europe from 1989 to 2004. Astra 1A was retired and becamederelict in December 2004.
Among the channels carried in the early years after launch were the entire four channelSky Television (laterBritish Sky Broadcasting, after the merger with rivalBritish Satellite Broadcasting on theMarcopolo satellite), the services consisted ofSky Channel,Sky News,Sky Movies andEurosport, the ScandinavianTV3 andTV1000, the GermanPro7,Sat.1,RTL plus,3sat andTeleclub, the DutchRTL 4 as well asFilmNet,Screensport,MTV Europe,The Children's Channel andLifestyle.[3]
Astra 1A began television broadcasts on 5 February 1989. Until 1998 all ofSES' satellites were co-located with Astra 1A at 19.2° East, leading that position to be known mostly as Astra 1 (later,Astra 19.2°E).
The satellite came into its position on 7 January 1989. FilmNet became the first channel on the satellite when it launched ontransponder 11 on 1 February 1989. Other channels such as Sky Channel, Eurosport, Sky News and Sky Movies fromSky Television, as well as the Scandinavian TV3 (Sweden) andMTV Europe all launched in February 1989. The Children's Channel/Lifestyle and Screensport followed in March 1989. The Scandinavian pay channel TV1000 launched in August 1989.
Sky Television had originally planned to launchThe Disney Channel andSky Arts on the Astra satellite in 1989,[4] but these plans failed to materialize. The transponders intended for these channels, were used for Eurosport and the DutchRTL Veronique (which would later become RTL4), respectively. The first German language programmes, RTL plus, Sat.1 and Pro 7 all launched on 8 December 1989. With the launch of 3sat in March 1990 andTeleclub in June 1990 all transponders were occupied.
Lifestyle was replaced byVOX in January 1993. Soon thereafter, Screensport merged with Eurosport and its transponder was replaced byRTL2. RTL 4 moved toAstra 1D in 1995 and was replaced bySuper RTL. Teleclub was replaced byKabel 1 during the same year. TV3 and TV1000 left Astra in 1996 and their transponders were taken over byBSkyB who used them forFox Kids/Sky Two andGranada Plus/Granada Men & Motors. Filmnet also left in 1996, to be replaced byBloomberg Germany in 1997. BSkyB ended their analogue service in 2001, which meant that its services closed down. By the end of 2001, the satellite was moved from 19.2° East to serve few years at 5.2° East.
On 19.2° East, the satellite was replaced byAstra 1F. Many channels, including RTL II, RTL, Eurosport, VOX, Sat.1, Kabel Eins, Super RTL and ProSieben were still broadcasting in analogue on the same frequencies in 2009.[5]
In December 2004, Astra 1A was moved into a "graveyard orbit" after some time at 5.2° East providing data services.
As with all GE Astro Space manufactured satellites, the AS-4000 Ku-band satellite design was used for the spacecraft bus, propulsion, thermal protection and solar array, the thermal protection made to protect Astra 1A's 16 transponder payload on board from theSun'ssolar wind andcosmic rays.
While never confirmed bySES, Astra 1A is believed to have experienced a number of technical problems throughout its lifetime, including overheating and power system anomalies.[6] After the launch of Astra 1C in 1993, two transponders (4 and 15) were moved from Astra 1A to Astra 1C.[6][7] Transponder 1 was also moved to Astra 1F after its launch, leaving 13 operational transponders on Astra 1A in the late 1990s.[7] Between February and April 1999, transponder 10 was also moved to Astra 1F.[8]
In mid-1999, the satellite experienced a loss of power which reduced its usable payload to 6 transponders.[6][9] Transponders 3, 7, 8, 11, 12 and 16 remained on Astra 1A while the others were transferred to Astra 1F; Astra 1C continued to carry transponders 4 and 15 as before.[9] Documentation provided bySES since this event stated the usable payload as 5/6 transponders.[1]
| Transponder | Frequency | Channels carried |
|---|---|---|
| 1 | 11,214 H | Screensport (1989–1993),RTL2 (1993–2012) |
| 2 | 11,229 V | RTL (1989–2012) |
| 3 | 11,244 H | TV3 Sweden (1989–1996),Granada Plus/Granada Men & Motors (1996–2001),RTL Shop (2001–2009) |
| 4 | 11,259 V | Eurosport (1989–2012) |
| 5 | 11,273 H | Lifestyle/The Children's Channel (1989–1993),VOX/The Quantum Channel (1993–1999), Vox (1999-2012) |
| 6 | 11,288 V | Sat.1 (1989–2012) |
| 7 | 11,303 H | TV1000 (1989–1996),Sky2 (1996–1997),Fox Kids (1997–2001),Viva Zwei (2001),Viva Plus, (2002–2007) |
| 8 | 11,318 V | Sky One (1989–2001) |
| 9 | 11,332 H | Eurosport (1989),Teleclub (1990–1995),Kabel 1 (1995–2012) |
| 10 | 11,347 V | 3sat (1990–2012) |
| 11 | 11,362 H | FilmNet (1989–1997),Adult Channel (1997),Bloomberg UK (1997–1998),Sky Box Office 3 (1998–2000),Bloomberg DE (2000–2008) |
| 12 | 11,377 V | Sky News (1989–2001) |
| 13 | 11,391 H | RTL-V (1989–1990),RTL 4 (1990–1995),Super RTL (1995–2012) |
| 14 | 11,406 V | Pro Sieben (1989–2012) |
| 15 | 11,421 H | MTV Europe (1989–1997),MTV UK & Ireland (1997–2001),MTV 2 POP (2001–2005) |
| 16 | 11,436 V | Sky Movies (1989–1997),Sky Movies Screen 1 (1997–1998),Sky Moviemax (1998–2001),Fox News (2001–2002) |
