Amazonas 4B
| Operator | Hispasat |
|---|---|
| COSPAR ID | {{#property:P247}} |
| Mission duration | ~15 years |
| Spacecraft properties | |
| Bus | GEO Star-2.4 or GEO Star-3 |
| Manufacturer | Orbital Sciences Corporation |
| Start of mission | |
| Launch date | Cancelled |
| Payload | |
| 18 Ku-band transponders | |
Amazonas 4 network | |
The Amazonas 4B was a Spanish project for a companion satellite to the Amazonas 4A. It was developed to provide high power communications to South America. Planned by Hispasat, it was going to be constructed by Orbital Sciences Corporation. However, a power failure in the Amazonas 4A provoked the replacement of this project by the more potent Amazonas 5.[1][2][3]
Body
Its planned specifications are not clear since it was cancelled before construction began. However, being projected together with the Amazonas 4A it is safe to assume that they would have been similar. Consequently the Amazonas 4B was going to use the GEO Star-2.4 or the more modern GEO Star-3 as a bus. Its service life would have lasted about 15 years.[4]
Propulsion
It was projected that its engine would be the same as the Amazonas 4A: the BT-4 developed by the Japanese company IHI Aerospace. It is bipropellant fueled by Unsymmetrical Dimethylhydrazine using Nitrogen Tetroxide as the oxidizer.[4]
The engine alone is 0.65 meters tall and has a dry mass of 4 kg while capable of producing 450 N of thrust.[5]
Communications Subsystem
The communications subsystem was going to be the main payload of the satellite. It consisted of 18 Ku-band transponders. In addition to two 2.5 x 2.7 meter single shell super elliptical deployable reflectors. All of them orientable and capable of working individually or grouped in order to speed up or relay communications.
Project
A preliminary agreement between Hispasat and Orbital Sciences Corporation was signed on the 25th of June 2012. This agreement included the construction of two new satellites, Amazonas 4A and Amazonas 4B that would be located at orbital position 61 West longitude.[6]
However, during 2014, in the wake of the partial power failure of the Amazonas 4A,[7] the agreement was modified and the Amazonas 4B was scrapped and replaced by the future project Amazonas 5.[8][9] This time constructed by SSL.[10][11] The Amazonas 5 was to provide the same capabilities of both the Amazonas 4A (previous to its power failure) and the Amazonas 4B. It was successfully put into orbit on the 11th of September 2017.[12][13]
See also
- Amazonas 4A
- Hispasat
- Orbital Sciences Corporation
References
- ↑ DVBxtreme. "Les satellites Hispasat changent de nom". Retrieved 2021-08-19.
- ↑ "HISPASAT renews designations of its satellite fleet". www.hispasat.com (in español). 2016. Retrieved 2021-08-19. Unknown parameter
|url-status=ignored (help) - ↑ "Hispasat Orders Amazonas 5 From SSL to Take on Amazonas 4A Capacity - Via Satellite -". Via Satellite. 2014-12-05. Retrieved 2021-08-22.
- ↑ 4.0 4.1 "Amazonas 4B". Gunter's Space Page. Retrieved 2021-08-19.
- ↑ "Amazonas 4A – Spacecraft & Satellites". Retrieved 2021-08-23.
- ↑ "Orbital Sciences Corporation : HISPASAT and Orbital sign contract for the construction of two new Amazonas satellites". Northrop Grumman Newsroom. Retrieved 2021-08-22.
- ↑ "Spaceflight Now | Breaking News | Power system failure detected on Amazonas 4A". www.spaceflightnow.com. Retrieved 2021-08-23.
- ↑ "ILS Proton launches Hispasat satellite". SpaceNews. 2017-09-12. Retrieved 2021-08-22.
- ↑ "Amazonas 5". Gunter's Space Page. Retrieved 2021-08-23.
- ↑ "Amazonas 5 – Amazonas 5 | Spaceflight101". Retrieved 2021-08-19.
- ↑ "HISPASAT appoints SSL to build the Amazonas 5". www.hispasat.com (in español). Retrieved 2021-08-19. Unknown parameter
|url-status=ignored (help) - ↑ "Proton launches Amazonas-5". russianspaceweb.com. Retrieved 2021-08-23.
- ↑ "Amazonas 5". Gunter's Space Page. Retrieved 2021-08-19.
External links
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