# Hellas Sat 4

> geosynchronous communications satellite

**Wikidata**: [Q20056001](https://www.wikidata.org/wiki/Q20056001)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SaudiGeoSat-1/HellasSat-4)  
**Source**: https://4ort.xyz/entity/hellas-sat-4

## Summary

Hellas Sat 4 is a communications satellite.

## Summary
Hellas Sat 4 is a geosynchronous communications satellite also known by the aliases SaudiGeoSat-1 and SGS-1. Launched on February 5, 2019, it operates from a geostationary orbit and is jointly operated by Hellas Sat and the King Abdulaziz City for Science and Technology. The spacecraft was manufactured by Lockheed Martin and has a launch mass of 6,495 kilograms.

## Key Facts
- **Aliases:** SaudiGeoSat-1, SGS-1, HS-4/SGS-1
- **Launch Date:** February 5, 2019
- **Launch Vehicle:** Ariane 5 ECA
- **Launch Site:** ELA-3
- **Launch Contractor:** Arianespace
- **Manufacturer:** Lockheed Martin
- **Spacecraft Bus:** A2100
- **Operators:** Hellas Sat; King Abdulaziz City for Science and Technology
- **Orbit:** Geostationary orbit (Geosynchronous)
- **Mass:** 6,495 kilograms
- **COSPAR ID:** 2019-007A
- **Satellite Catalog Number (SCN):** 44034
- **Significant Event:** Rocket launch on February 5, 2019

## FAQs
### Q: What is Hellas Sat 4?
A: Hellas Sat 4 is a geosynchronous communications satellite designed for telecommunications. It is alternatively identified as SaudiGeoSat-1 or SGS-1.

### Q: Who built and operates Hellas Sat 4?
A: The satellite was manufactured by Lockheed Martin using the A2100 spacecraft bus. It is jointly operated by Hellas Sat and the King Abdulaziz City for Science and Technology.

### Q: When and how was Hellas Sat 4 launched?
A: It was launched on February 5, 2019, aboard an Ariane 5 ECA rocket from the ELA-3 launch site under a contract with Arianespace.

## Why It Matters
Hellas Sat 4 represents a significant collaborative effort in the global telecommunications sector, bridging capabilities between Europe and the Middle East. Jointly operated by Hellas Sat (a major satellite operator in the region) and Saudi Arabia's King Abdulaziz City for Science and Technology, the satellite serves critical communication infrastructure needs.

Its construction by Lockheed Martin on the A2100 bus platform highlights advanced aerospace engineering tailored for longevity and reliability in geostationary orbit. Weighing approximately 6,495 kilograms at launch, it is a heavy-class satellite requiring the lift capacity of the Ariane 5 ECA, one of the world's most reliable heavy-lift launch vehicles. The successful deployment in early 2019 added vital capacity to the geosynchronous belt, enhancing data and telecommunication services for the operator's coverage areas. This mission also underscores the ongoing strategic partnership between Western aerospace manufacturers, European launch providers, and Middle Eastern scientific and telecommunications entities.

## Notable For
- **Joint Operation:** It is a collaborative project co-operated by Hellas Sat and the King Abdulaziz City for Science and Technology (Saudi Arabia).
- **Heavy Payload:** With a mass of 6,495 kg, it is a substantial satellite platform requiring heavy-lift launch capabilities.
- **Advanced Platform:** The satellite utilizes Lockheed Martin's modern A2100 spacecraft bus.
- **Launch Sequence:** It followed the Arabsat-6A satellite in its mission timeline or configuration context.

## Body
### Development and Manufacturing
Hellas Sat 4, identified interchangeably as SaudiGeoSat-1 or SGS-1, is a high-capacity communications satellite. The spacecraft was manufactured by Lockheed Martin, utilizing the A2100 satellite bus, a platform known for providing high power and flexibility for communications payloads.

### Launch and Deployment
The satellite launched successfully on February 5, 2019. The launch was conducted by Arianespace using the Ariane 5 ECA launch vehicle, originating from the ELA-3 launch complex. This event is recorded as a significant rocket launch in the satellite's history.

### Technical Specifications
The satellite has a confirmed mass of 6,495 kilograms. It is designed to operate in a geostationary orbit (classified as a geosynchronous satellite). It is tracked under the COSPAR ID 2019-007A and the Satellite Catalog Number 44034.

### Operational Context
The satellite is positioned to follow the operational timeline of the Arabsat-6A satellite. It serves the interests of its dual operators, Hellas Sat and the King Abdulaziz City for Science and Technology, providing telecommunications services from its orbital slot.

## References

1. Jonathan's Space Report
2. [Source](https://www.esa.int/Enabling_Support/Space_Transportation/Ariane/Ariane_5_s_first_launch_of_2019)