Intelsat 901

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Intelsat 901
Mission type Communications
Operator Intelsat
COSPAR ID 2001-024A
SATCAT no. 26824
Mission duration 13 years
Spacecraft properties
Bus SSL 1300
Manufacturer Space Systems/Loral
Launch mass 4,723.0 kilograms (10,412.4 lb)
Power 8,6 kW
Start of mission
Launch date 9 June 2001, 23:47:50 (2001-06-09UTC23:47:50Z) UTC
Rocket Ariane 44L V148
Launch site Kourou ELA-2
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime GEO
Longitude First orbital position: 67.5° W
Current orbital position: 18.0° W
Perigee 35,770 kilometres (22,230 mi)
Apogee 35,804 kilometres (22,248 mi)
Period 1,436.1 minutes
Epoch June 9, 2001
Bandwidth 36 and 72 MHz

C-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 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.


  • 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[edit]

On 9 October 2015, 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.


  • 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


  1. ^ Gruss, Mike. "Russian Satellite Maneuvers, Silence Worry Intelsat". Retrieved 10 October 2015. 

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