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Hellas Sat 4/SaudiGeoSat 1
NamesHellas Sat 4, SaudiGeoSat-1, Saudi Geostationary Satellite 1, HS-4/SGS-1
Mission typeTelecommunications
OperatorKACST, Hellas Sat
COSPAR ID2019-007A
SATCAT no.44034
Spacecraft properties
ManufacturerLockheed Martin
Launch mass6,495 kilograms (14,319 lb)
Start of mission
Launch date21:01:00, 5 February 2019 (UTC) (2019-02-05T21:01:00Z)
RocketAriane flight VA247
Launch siteELA-3, Guiana Space Centre
Orbital parameters
Longitude39° East
Altitudegeosynchronous (≈35786 km)

SaudiGeoSat 1/HellasSat 4, also known as HellasSat 4/SaudiGeoSat 1 (abbreviated HS-4/SGS-1), is a Saudi and Greek geosynchronous communication satellite of KACST and Hellas Sat. It was built by Lockheed Martin and was launched on 5 February 2019 on board Ariane flight VA247.

The satellite will provide telecommunications capabilities, including television, Internet, telephone and secure communications in the Middle East, South Africa and Europe. It is the 16th Saudi satellite launched into space[1][2][3] and the 4th Greek and Cypriot satellite.


SGS-1 satellite was developed, manufactured and tested by Lockheed Martin in collaboration with KACST where 15 Saudi engineers were trained and certified by Lockheed Martin.[2]

Launch and Specification[edit]

HS-4/SGS-1 was launched on an Ariane 5 operated by Arianespace from the Guiana Space Center in French Guiana on Ariane flight VA247.[1]

The satellite weighted 6,495 kilograms (14,319 lb) fully fuelled for launch, and it was placed into a geostationary transfer orbit. It will maintain a geosynchronous orbit at 39° East longitude.[4]


  1. ^ a b "Ariane Flight VA247". Arianespace. Retrieved 5 February 2019.
  2. ^ a b "Saudi Arabia to launch 16th satellite into space". Arab News. 5 February 2019. Retrieved 5 February 2019.
  3. ^ Lockheed Martin Completes Hellas-Sat-4/SaudiGeoSat-1 Satellite Assembly and Ships to Environmental Testing. Lockheed Martin - Press release. 30 November 2017.
  4. ^ Clark, Stephen. "Live coverage: Ariane 5 set to launch satellites for Saudi Arabia and India – Spaceflight Now". Retrieved 5 February 2019.