Coordinates: 0°N 18°W / 0°N 18°W / 0; -18

Intelsat 901
Mission typeCommunications
OperatorIntelsat
COSPAR ID2001-024A
SATCAT no.26824
Mission duration13 years
Spacecraft properties
BusSSL 1300
ManufacturerSpace Systems/Loral
Launch mass4,723.0 kilograms (10,412.4 lb)
Power8,6 kW
Start of mission
Launch date9 June 2001, 23:47:50 (2001-06-09UTC23:47:50Z) UTC
RocketAriane 44L V141
Launch siteKourou ELA-2
ContractorArianespace
Orbital parameters
Reference systemGeocentric
RegimeGEO
LongitudeFirst orbital position: 67.5° W
Current orbital position: 18.0° W
Perigee altitude35,770 kilometres (22,230 mi)
Apogee altitude35,804 kilometres (22,248 mi)
Inclination
Period1,436.1 minutes
EpochJune 9, 2001
Transponders
Bandwidth36 and 72 MHz
EIRPC-band global beam 36 dBW

C-band Hemi Beam 38 dBW C-band beam zone 38 dBW Ku-band 53 dBW Europe Spot 1

Spot 2 Ku-band Europe 52 dBW
Intelsat 9
← Intelsat 806 (Intelsat 8)
 

Intelsat 901 (IS-901) was the first of 9 new Intelsat satellites launched in June 2001 at 342°E, providing Ku-band spot beam coverage for Europe, as well as C-band coverage for the Atlantic Ocean region, and provides features such as selectable split uplink for SNG, tailored for increased communications demands such as DTH and Internet.

Satellite

  • Increased power – IS-901 is designed to provide up to 5 dB for downlink e.i.r.p., and up to 1.8 dB for G/T over the IS-VII satellites.
  • Increased Capacity – With over 72 C-band 36 MHz equivalent unit transponders, IS-901 provides a significant increase in capacity over the previous satellite at 342°E.
  • Improved Coverage – IS-901 provides significantly expanded zone coverage. The Ku-band spot beams also include more area within each zone.

Encounter with Russian Olymp satellite

On 9 October 2015, Spacenews.com reported[1] that in April 2015, the Russian satellite Olymp-K had moved to within 10 kilometres (6.2 mi) of Intelsat 901 and the nearby Intelsat 7, causing concerns of a safety-of-flight incident. Attempts by Intelsat to contact the Russian satellite's operators were not successful, and no reason for the satellite's movement was given by the Russian government. The move sparked classified meetings within the Department of Defense and heightened suspicions that that Olymp-K satellite was performing signals intelligence, or was possibly an anti-satellite weapon.

Mission Extension Vehicle-1

On 9 October 2019, the Mission Extension Vehicle launched from Baikonur Cosmodrome in Kazakhstan on a Proton-M rocket. Prior to launch ground controllers moved Intelsat to a graveyard orbit so Eutelsat 5 West B which launched with the MEV can use its slot. Docking will take place in December and MEV will tow the disabled satellite to 27.5 degrees West where it will remain for 5 years. When the mission is complete MEV will move it back to the graveyard orbit and will perform a deorbit burn to dispose of it before moving to the next client on the list.[2]

Specifications

  • Total Transponders: Ku-Band: up to 22 (in equiv. 36 MHz units)
  • Polarization: Ku-Band: Linear - Horizontal or Vertical
  • Uplink Frequency: Ku-Band: 14.00 to 14.50 GHz
  • Downlink Frequency: Ku-Band: 10.95 to 11.20 GHz and 11.45 to 11.70 GHz
  • G/T (Ku-Band) (Beam Peak): Spot 1: up to +9.0 dB/K, Spot 2: up to +9.0 dB/K
  • SFD Range (Beam Edge): Ku-Band: -87.0 to -69.0 dBW/m²

References

  1. ^ Gruss, Mike. "Russian Satellite Maneuvers, Silence Worry Intelsat". spacenews.com. Retrieved 10 October 2015.
  2. ^ "Space Logistics Services". Northrop Grumman. Retrieved 2019-10-18.

External links

  • Intelsat 901