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TSIS-1

TSIS-1 measures the total amount of sunlight reaching the top of Earth’s atmosphere and how that energy is distributed across wavelengths, providing high-accuracy solar irradiance observations for understanding ozone and other atmospheric processes from the International Space Station.

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Identity

Aliases
Total and Spectral solar Irradiance Sensor-1Total and Spectral Solar Irradiance SensorTSIS-1
Name
TSIS-1
Status
active

Details

Astronauts
-
Description
TSIS-1 measures the total amount of sunlight reaching the top of Earth’s atmosphere and how that energy is distributed across wavelengths, providing high-accuracy solar irradiance observations for understanding ozone and other atmospheric processes from the International Space Station.
Destination
International Space Station low Earth orbit at approximately 400 km altitude (51.6° inclination)
Outcome
Affixed to the International Space Station in December 2017, TSIS-1 continues the long-running solar-irradiance record with improved stability and accuracy for atmospheric and climate research.
Programs
Start Date
2017-12-15
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Creation Time
August 15, 2026 at 07:42:21 UTC
Updated Time
August 21, 2026 at 09:57:26 UTC

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