AraseArtistic rendering of Arase in orbit. |
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Mission type | Earth observation |
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Operator | JAXA |
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COSPAR ID | 2016-080A |
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SATCAT no. | 41896 |
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Mission duration | 7 years, 8 months and 15 days (elapsed) |
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Spacecraft properties |
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Bus | SPRINT |
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Launch mass | ~350 kg |
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Power | ≧700 W |
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Start of mission |
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Launch date | 11:00:00, December 20, 2016 (UTC) (2016-12-20T11:00:00Z) |
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Rocket | Epsilon |
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Launch site | Uchinoura |
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Orbital parameters |
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Reference system | Geocentric |
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Perigee altitude | ~460 km |
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Apogee altitude | ~32110 km |
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Inclination | ~31 degrees [1] |
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Period | ~565 minutes |
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Instruments |
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- Extremely high-energy electron sensor (XEP-e)
- High-energy particle sensor – electron (HEP-e)
- Medium-energy particle sensor – electron (MEP-e)
- Low-energy particle sensor – electron (LEP-e)
- Medium-energy particle – ion (MEP-i)
- Low-energy particle – ion (LEP-i)
- Magnetic Field Experiment (MGF)
- Plasma Wave Experiment (PWE)
- Software Wave-Particle Interaction Analyzer (S-WPIA)
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Arase, formerly known as Exploration of energization and Radiation in Geospace (ERG), is a scientific satellite to study the Van Allen belts. It was developed by the Institute of Space and Astronautical Science of JAXA. While there was a scientist working on a similar project with the surname Arase, the satellite's name has nothing to do with him but instead named after a river beside the launch point.
It was launched aboard Epsilon launch vehicle at 11:00:00, 20 December 2016 UTC into apogee height 32250 km, perigee 214 km orbit. Subsequent perigee-up operation moved its orbit to apogee 32110 km, perigee 460 km of 565 minutes period.[2]
Spacecraft
The Arase spacecraft is the second satellite based on SPRINT bus, after Hisaki (SPRINT-A). Arase weighs about 350 kg, measures about 1.5 m × 1.5 m × 2.7 m at launch.[3] Once in orbit, it will extend four solar panels, two 5 m masts, and four 15 m wire antennas.[3] The spacecraft is spin-stabilized at 7.5 rpm (8 seconds).[3]
Planned mission duration was for one year of scientific observation, [3] but the mission remains active over 5 years later.
Launch
Arase's launch on the enhanced Epsilon's maiden flight was originally scheduled for 2015, but was postponed to the 2016 financial year due to satellite development delays.[4]
Instruments
Arase carries following instruments:[3]
- XEP-e (Extremely high-energy electron sensor)[5]
- HEP-e (High-energy particle sensor – electron)
- MEP-e (Medium-energy particle sensor – electron)
- LEP-e (Low-energy particle sensor – electron)
- MEP-i (Medium-energy particle – ion)
- LEP-i (Low-energy particle – ion)
- MGF (Magnetic Field Experiment)
- PWE (Plasma Wave Experiment)
- S-WPIA (Software Wave-Particle Interaction Analyzer)
MGF is located at the end of 5 m extended mast.[3]
PWE consists of a search coil (PWE-MSC) located at the end of another 5 m extended mast, four 15 m wire antennae (PWE-WPT), and associated electronics unit (PWE-E).[3]
S-WPIA will analyse the data obtained by other instruments.[3]
See also
- Spaceflight portal
References
- ^ "Arase (ERG) Geospace Probe - JAXA". JAXA. Retrieved 2018-03-14.
- ^ ジオスペース探査衛星「あらせ」(ERG)の軌道変更運用(近地点高度上昇)の完了について (in Japanese). JAXA. 13 January 2017. Retrieved 18 January 2017.
- ^ a b c d e f g h プレスキット/2016年11月18日(木) (PDF) (in Japanese). November 18, 2016. Archived from the original (PDF) on December 26, 2016. Retrieved November 27, 2016.
- ^ Shogo Matsuda (16 January 2015). "Japan's Epsilon rocket shoved aside?". Nikkei Asian Review. Retrieved 6 February 2015.
- ^ "Exploration of energization and Radiation in Geospace (ERG)". JAXA. 2012. Archived from the original on 2013-10-30. Retrieved 2013-09-08.
External links
- Exploration of energization and Radiation in Geospace "ERG", JAXA
- Exploration of energization and Radiation in Geospace ERG, ISAS/JAXA
- Send your name and a message for ERG!
- The ERG satellite on YouTube by JAXA
- ERG Science Center
Japanese space program
- Italics indicates projects in development.
- Symbol † indicates failed projects.
Strikethrough lines indicate cancelled projects. |
Space agencies |
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National space agencies | |
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Joint development partners | |
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Past | - Akebono
- Daichi
- Denpa
- Fuyo-1
- Jikiken
- Kyokko
- Midori
- Momo
- Ohozora
- Taiyo
- TRMM1
- Ume
- Geotail1
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Active | |
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Future | |
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Engineering tests |
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Past | |
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Active | |
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Future | - BEAK
- ETS-IX
- G-SATELLITE
- SERVIS-3
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Past | |
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Active | - CUTE
- Fuji-3
- Hitomi
- Hodoyoshi
- Horyu
- Kiseki
- PROITERES
- Raijin
- Raijin-2
- SEEDS
- SOCRATES
- XI
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Future | |
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January | |
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February | |
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March | |
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April | |
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May | |
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June | |
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July | |
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August | |
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September | |
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October | |
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November | |
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December | - Progress MS-04
- Göktürk-1
- Resourcesat-2A
- WGS-8
- HTV-6 / Kounotori 6, (EGG, TuPOD, UBAKUSAT, AOBA-VELOX, STARS, FREEDOM, ITF, Waseda-SAT, OSNSAT, Tancredo-1, TechEDSat, Lemur-2 × 4)
- Fengyun 4A
- CYGNSS × 8
- EchoStar 19
- Arase / ERG
- TanSat, Spark × 2
- Star One D1, JCSAT-15
- SuperView / Gaojing-1 01, 02, Bayi Kepu 1
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Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses). |