SDS-4
Small satellite
Mission type | Technology |
---|---|
Operator | JAXA |
COSPAR ID | 2012-025C |
SATCAT no. | 38339 |
Spacecraft properties | |
Spacecraft type | SDS |
Launch mass | 50 kilograms (110 lb)[1] |
Start of mission | |
Launch date | 17 May 2012, 16:39 (2012-05-17UTC16:39Z) UTC[2] |
Rocket | H-IIA 202 |
Launch site | Tanegashima Yoshinobu 1 |
Contractor | Mitsubishi |
End of mission | |
Deactivated | 1 July 2021 (2021-08) |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
Perigee altitude | 666 kilometres (414 mi) |
Apogee altitude | 678 kilometres (421 mi) |
Inclination | 98.23 degrees |
Period | 98.05 minutes |
Epoch | 30 October 2013, 08:31:20 UTC[3] |
SDS-4 (Small Demonstration Satellite 4) is a small satellite (50 cm cube with mass of 50 kg) developed by JAXA. It was launched as a secondary payload on the Shizuku mission on 17 May 2012 UTC.[4]
In 2019, its ownership was transferred to the SKY Perfect JSAT Corporation (JSAT).[5] Operation was terminated by the end of June 2021.[6]
There are four rather specialised systems on the satellite:
- SPAISE (SPace-based Automatic Identification SystEm) - test on-orbit a receiver for picking up signals from Automatic Identification System transmitters on ships well out to sea, and determine how space-based reception is affected by interference between nearby transmitters and by environmental conditions.
- FOX (Flat heat-pipe on-orbit experiment) - to test whether flat heat pipes work in space in accordance with theoretical models and with tests on Earth
- IST (In-flight experiment of Solar absorption rate with THERME) - to acquire information about the effect of sunlight in space on thermal coatings, re-flying the THERME instrument developed by CNES for testing different thermal coatings [7]
- QCM (Quartz Crystal Microbalance) - to test whether a Japanese-manufactured quartz microbalance works well in monitoring contamination of the satellite from assembly to on-orbit operation.
References
- ^ Krebs, Gunter. "SDS 4". Gunter's Space Page. Retrieved 31 October 2013.
- ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 31 October 2013.
- ^ "SDS-4 Satellite details 2012-025C NORAD 38339". N2YO. 30 October 2013. Retrieved 31 October 2013.
- ^ "Small Demonstration Satellite-4 (SDS-4)". JAXA. Retrieved 3 December 2019.
- ^ "JAXA and SKY Perfect JSAT Conclude an Agreement on the Transfer of the Small Demonstration Satellite-4". JAXA. 24 April 2019. Retrieved 3 December 2019.
- ^ 2022年3月期 第1四半期 決算説明会 (PDF) (in Japanese). SKY Perfect JSAT Holdings Inc. 4 August 2021. Retrieved 7 August 2021.
- ^ "In-flight thermal coatings ageing on the THERME experiment" (PDF).
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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).
Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
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