Astrid (satellite)
| Astrid 1 | |
|---|---|
| Type: | Research satellite |
| Country: |
 Sweden
|
| COSPAR-ID : | 1995-002B |
| Mission dates | |
| Dimensions: | 27 kg |
| Size: | 29 × 45 × 45 cm |
| Begin: | January 24, 1995, 03:54 UTC |
| Starting place: | Plesetsk 132/1 |
| Launcher: | Cosmos-3M |
| Status: | out of service since March 1, 1995 |
| Orbit data | |
| Rotation time : | 105.0 min |
| Orbit inclination : | 82.9 ° |
| Apogee height : | 1023 km |
| Perigee height : | 968 km |
| Astrid 2 | |
|---|---|
| Type: | Research satellite |
| Country: |
Sweden
|
| COSPAR-ID : | 1998-072B |
| Mission dates | |
| Dimensions: | 29 kg |
| Size: | 170 × 110 × 30 cm |
| Begin: | December 10, 1998, 11:57 UTC |
| Starting place: | Plesetsk 132/1 |
| Launcher: | Cosmos-3M |
| Flight duration: | 7 month |
| Status: | out of service since July 24, 1999 |
| Orbit data | |
| Rotation time : | 105 min |
| Orbit inclination : | 83.0 ° |
| Apogee height : | 1013 km |
| Perigee height : | 978 km |
Astrid is the name for a series of Swedish scientific satellites named after the Swedish writer Astrid Lindgren .
Astrid 1
Astrid 1 has a mass of only 27 kg and a size of 29 cm in height and 45 cm in length and width. It is therefore also known as a microsatellite . The satellite was launched on January 24, 1995 together with a Russian navigation satellite of the Zikada type by a Russian Kosmos-3M from the Russian cosmodrome Plesezk and launched into an orbit with an inclination of 82.9 ° and an altitude of approx. 1000 km. The scientific instruments (weighing a total of 4.36 kg and consuming 11.88 watts of electricity) went into operation on February 6th, but they failed on March 1st of the same year. Nevertheless, the satellite was able to show that scientific space travel can be carried out at low costs (1.4 million euros) and promptly (one year development time).
There are three scientific instruments:
- PIPPI ( Prelude in Planetary Particle Imaging ) examined neutral particles (atoms and molecules); Charged particles with an energy of up to 140 keV are shielded by the instrument and thus not detected. The energy of the neutral particles is also measured.
- EMIL ( Electron Measurements - In-situ and Lightweight ) is an electron spectrometer .
- MIO ( Miniature Imaging Optics ) is a pair of ultraviolet photometers for examining auroras and the high atmosphere.
The three research instruments are to Astrid Lindgren's stories and their title character Pippi Longstocking , Emil i Lönneberga and Mio, min Mio named.
Astrid 2
Astrid 2 is the successor to Astrid 1 and is roughly in the same orbit and is also spin stabilized with its axis of rotation towards the sun. It was launched from Plesetsk on December 10, 1998, also with a Kosmos-3M as a secondary payload when the Nadezhda 5 satellite was launched. The satellite was in operation until July 24, 1999. The mass of the satellite is 29 kg, its size with unfolded solar panels 1700 × 1100 × 300 mm. Communication with the satellite took place via two ground stations, one in Sweden and one in Antarctica ( SANAE-IV station ).
Astrid 2 has four instruments, a Langmuir probe interferometer, an ion and electron spectrometer, an instrument for measuring electric and magnetic fields and a UV photometer. The instruments together weigh about 9 kg and consume 16 watts of energy. The data transfer to the ground takes place at 128 kBit / s.
Web links
- Astrid and Astrid-2 in the Encyclopedia Astronautica (English)
- Astrid 1 , Astrid 2 on Gunter's Space Page (English)
- Swedish Institute of Space Physics: The Astrid-2 Micro satellite (English)
- Heavens-Above: Astrid , Astrid 2 (English)
Individual evidence
- ↑ Astrid in the NSSDCA Master Catalog , accessed on September 18, 2012 (English).
- ↑ Astrid 2 in the NSSDCA Master Catalog, accessed on September 18, 2012 (English).