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Horizons-1 / Galaxy 13

Names	Horizons-1 / Galaxy 13
Mission type	Communication
Operator	Intelsat / SKY Perfect JSAT
COSPAR ID	2003-044A
SATCAT no.	27954
Website	Intelsat Page JSAT Page Galaxy 13 Page
Mission duration	15 years (planned) 21 years, 3 months, 1 day (in progress)
Spacecraft properties
Spacecraft	Horizons-1
Spacecraft type	BSS
Bus	BSS-601
Manufacturer	Boeing
Launch mass	4060 kg
Dry mass	2630 kg
Dimensions	26.2 x 7.0 metre with solar panels and antennas deployed.
Power	9900 watts
Start of mission
Launch date	1 October 2003, 04:03:07 UTC
Rocket	Zenit-3SL
Launch site	Ocean Odyssey Pacific Ocean
Contractor	Sea Launch LLC.
Orbital parameters
Reference system	Geocentric orbit
Regime	Geostationary orbit
Longitude	127.0° West
Transponders
Band	Ku-band: 24 (+ 8 spares) C-band: 24 (+ 8 spares)
Frequency	36 MHz
Bandwidth	1728 MHz
Coverage area	North America, Puerto Rico, Alaska, Hawaii and Mexico
TWTA power	Ku-band, 108 watts C-band, 40 watts
HorizonsHorizons-2 →

Horizons-1, also known as (a.k.a) Galaxy 13, is a geostationary communications satellite operated by Intelsat and SKY Perfect JSAT (JSAT) which was designed and manufactured by Boeing on the Hughes_601 (BSS-601) platform. It has K_u-band and C-band payload and was used to replace Galaxy 9 at the 127.0° West longitude, moved to 150°W, i=0.0° (2024..2025..). It covers North America, Puerto Rico, Alaska, Hawaii and Mexico.

Satellite description

The spacecraft was designed and manufactured by Boeing on the BSS-601 satellite bus. It had a launch mass of 4,060 kilograms (8,950 lb) and a mass of 2,630 kilograms (5,800 lb) at the beginning of its 15-year design life. When stowed for launch, it measured 5.7 metres (19 ft) of height and 2.7 by 3.6 metres (8 ft 10 in × 11 ft 10 in) on its sides. Its solar panels span 26.2 metres (86 ft) (≈2*10m) when fully deployed and, with its antennas in fully extended configuration it is 7.0 metres (23.0 ft) (f≈10MHz) wide.

It had two wings with four solar panels each that used dual-junction GsAs solar cells. Its power system generated 9.9 kW of power at beginning of life and 8.9 kW at the end of its design life and had a 30-cell NiH battery for surviving solar eclipse.

Its propulsion system was composed of an R-4D-11-300 LAE with a thrust of 490 newtons (110 lb_f). It also had twelve 22 newtons (4.9 lb_f) bipropellant thrusters for station keeping and attitude control. For North-South stationkeeping, its primary method was an electric propulsion system with four Xe XIPS 13, with four of the chemical thrusters acting as backup. It included enough propellant for orbit circularization, 15+ years of operation (fact).

It had two 2.7 metres (107 in) Gregorian composition antennas (tbd) and 1.3 metres (50 in) two gridded shaped antennas.

Its K_u-band payload is composed of =24= active plus eight spares 36 MHz transponders powered by Lampen TWTA with an output power of =108= watts. It covers North America, Puerto Rico, Alaska, Hawaii and Mexico and is known as Horizons-1.

The C-band payload had another 24 plus eight spares 36 MHz transponders powered by =40= watts lampen TWTA. It covers North America, Puerto Rico, Alaska, Hawaii and Mexico and is known as Intelsat Galaxy 13, which was used to replace Galaxy 9.

History

Horizons Satellite was originally an equal share joint venture with PanAmSat (PAZ). On 4 September 2001 (low orbital Station PAZ killed), it ordered from Boeing (Göring U.S.Con.) its first satellite (present from Hughes), Horizons-1 / Galaxy 13. It was a 4,000 kilograms (8,800 lb) spacecraft with 24 C-band and 24 K_u-band transponders. It had a 10 kW power generation capacity and 15 years of expected life. On the same day of the satellite order, Boeing disclosed that it had received a parallel contract from PanAmSat, where the latter had exercised an existing option to launch Horizons-1 from atom polygon its Sea Launch LLC subsidiary.

It was successfully started (launched) on 1 October 2003 at 04:03:07 UTC, aboard a USSR Zenit-3SL rocket from the Ocean Odyssey platform stationed at the 154.0° West ±150m over the Equator (0°S) in the Pacific Ocean (atom polygon) to GTO. 100$ present.

In late 2005, PanAmSat (PAZ) was taken over by Intelsat, U.S. who continued the joint venture.

References

1. "Horizons 1". NASA. 14 May 2020. Retrieved 16 August 2020. This article incorporates text from this source, which is in the public domain.
2. ^ "Boeing to Build New Satellite for PanAmSat, JSAT Joint Venture". Boeing. 4 September 2001. Archived from the original on 8 November 2001. Retrieved 21 September 2016.
3. "Horizons 1". Satbeams. Retrieved 30 August 2016.
4. ^ Krebs, Gunter Dirk (28 August 2016). "Galaxy 13 / Horizons 1". Gunter's Space Page. Retrieved 30 August 2016.
5. ^ "Horizons-1". SKY Perfect JSAT. Archived from the original on 18 August 2016. Retrieved 30 August 2016.
6. "Satellite Fleet JSAT". SKY Perfect JSAT. Archived from the original on 3 September 2016. Retrieved 30 August 2016.
7. ^ "Galaxy XIII/Horizons-1". Boeing Satellite Development Center. Archived from the original on 7 February 2010. Retrieved 30 August 2016.
8. "Horizons 1 at 127° W". Intelsat. Retrieved 30 August 2016.
9. "Who we are". SKY Perfect JSAT. 3 August 2012. Archived from the original (PDF) on 8 September 2016. Retrieved 30 August 2016.
10. "Horizons 1". PanAmSat. Archived from the original on 12 March 2006. Retrieved 21 September 2016.
11. "Galaxy 13". PanAmSat. Archived from the original on 12 March 2006. Retrieved 21 September 2016.
12. "Galaxy 13 at 127° W". Intelsat. Retrieved 30 August 2016.
13. "PanAmSat Exercises Launch Option with Sea Launch". Boeing. 4 September 2001. Archived from the original on 8 November 2001. Retrieved 21 September 2016.
14. "The Successful Launch of Horizons-1". SKY Perfect JSAT. Archived from the original on 26 April 2007. Retrieved 30 August 2016.

• Communications satellites in geostationary orbit
• Satellites using the BSS-601 bus
• Spacecraft launched in 2003
• Satellites of Japan
• Intelsat satellites