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Super Low Altitude Test Satellite
Also called Tsubame


Designation 43066 / 17082B
Launch date 23 Dec 2017
Country of origin Japan
Mission Remote sensing
Perigee/Apogee 271.5 km
Inclination 98.3°
Period 95.4 min
Launch vehicle H2A #50

The satellite will use an optical sensor in orbit lower than 300 km, benefiting from high resolution observations, low power transmissions for active sensors, and cost reductions for satellite manufacturing and launches.
A satellite in a super low orbit like SLATS will be exposed to air resistance, which is approximately 1,000 times greater than that of most Earth observation satellites at an altitude of 600 to 800 km. Consequently, this type of satellite will require a greater amount of fuel than conventional satellites. In order to solve the atmospheric drag issue, JAXA has adopted an ion engine. The ion engine uses fuel 10 times more efficiently than gas jets.

Lowest altitude maintained was 167.4 km

End of life

Out of service  
Decay 1 Oct 2019

External resources


sat-index articles

n2yo.com tracking

Technical data


Prime contractor JAXA
Mass at launch 400 kg
Dry mass  
Solar array  
DC power 1140 W
Design lifetime 2 years

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