NamesPlatform for Extra and Terrestrial Remote Examination with LCTF
OperatorTokyo Institute of Technology
Spacecraft properties
ManufacturerTokyo Institute of Technology
Start of mission
Launch date2022 (planned)
Launch siteUchinoura Space Center
Orbital parameters
Reference systemGeocentric orbit (planned)
RegimeLow Earth orbit
Multispectral cameras

PETREL (Platform for Extra and Terrestrial Remote Examination with LCTF) is a technology demonstration satellite being developed by Tokyo Institute of Technology. The microsatellite is equipped with a multispectral camera, which will be used to carry out two distinct missions. One mission is to survey the sky in ultraviolet wavelengths for the field of time-domain astronomy, and the other is to conduct spectroscopic observations of the Earth.[1] PETREL is planned to be launched as part of the Japanese space agency JAXA's 2022 Innovative Satellite Technology Demonstration-3 mission.


PETREL's role differs depending on its position in orbit: while inside Earth's shadow it will conduct astronomical observations, and while outside it will function as an Earth observation satellite.[1][2]

PETREL will conduct wide field observations in ultraviolet, which will work in tandem with ground-based observatories to study time-domain multi-messenger astronomy. PETREL is a pathfinder for the ULTRASAT mission.[3]

As an Earth observation satellite, PETREL will perform multispectral observation of both the land and seas to acquire data for use in agriculture and aquaculture.[4] PETREL's ocean observation will measure the level of plankton and nutrients in the waters, which the aquaculture industry will utilize to help ensure a stable amount of catches.[5]

See also


  1. ^ a b "About This Project" (in Japanese). Tokyo Institute of Technology. Retrieved 4 November 2021.
  2. ^ "超小型衛星による宇宙科学" (in Japanese). Tokyo Institute of Technology. Retrieved 4 November 2021.
  3. ^ "日本が関与する飛翔体を用いた高エネルギー天体物理学のロードマップ検討まとめ" (PDF) (in Japanese). High Energy AstroPhysics Association in Japan. 30 January 2021. Retrieved 4 November 2021.
  4. ^ ""PETREL" a small satellite project of JAXA's Innovative Satellite Technology Demonstration program" (in Japanese). Tokyo Institute of Technology. Retrieved 4 November 2021.
  5. ^ "UMITRON in cooperation with the Tokyo Institute of Technology was selected for the 3rd JAXA Innovative Satellite Demonstration program to launch a small satellite in 2022 with the mission to gather ocean observations for aquaculture" (Press release). Umitron. 25 June 2020. Retrieved 4 November 2021.