Intelsat 37e & BSAT-4a

Launch Time
Fri Sep 29, 2017 21:56 UTC

Flight VA239.


Ariane 5 ECA
Image Credit: Arianespace
Status: Retired
Price: $200.0 million
Liftoff Thrust: 15,120 kN
Payload to LEO: 21,000 kg
Payload to GTO: 10,500 kg
Stages: 2
Strap-ons: 2
Rocket Height: 53.0 m
Fairing Diameter: 5.4 m
Fairing Height: 17.0 m

Mission Details

Intelsat 37e

Intelsat 37e was built by Boeing (Hughes) and is based on the BSS-702MP platform. It will be powered by two solar wings, each with three panels of ultra triple-junction gallium arsenide solar cells.

With a service life of 15 years, the satellite will use C-band, Ku-band, and a steerable Ka-band capacity that will allow it to replace the Intelsat 901 spacecraft currently operating in the 18 degrees E location that Intelsat 37e will set up shop.

Payloads: 1
Total Mass: 6,438.0 kg
Geostationary Transfer Orbit


BSAT-4a sports 24 Ku-band transponders and will expand the availability of advanced television services such as high definition and 4K/8K ultra-high definition.

Based on the SSL 1300 platform, the satellite is designed to provide service for 15 years or longer, adding to B-SAT’s three other satellites, BSAT-3a, BSAT-3b, and BSAT-3c, although they are currently providing a 2K broadcasting service.

B-SAT has started 4K/8K test broadcasting from the BSAT-3 series and will provide a new service, 4K/8K regular broadcasting service by BSAT-4a starting in December 2018.

Payloads: 1
Total Mass: 3,520.0 kg
Geostationary Transfer Orbit


ELA-3, Guiana Space Centre, French Guiana, France



63rd orbital launch attempt


253rd mission
9th mission of 2017
245th successful mission
36th consecutive successful mission

Ariane 5

95th mission
5th mission of 2017
91st successful mission
81st consecutive successful mission