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TSIS-2

To Be Determined Rocket Lab, Electron

Mission: TSIS-2

Astrophysics · Sun-Synchronous Orbit

The Total and Spectral Solar Irradiance Sensor 2 (TSIS-2) is a satellite designed by NASA to measure the Sun's energy input to Earth. TSIS-2 comprises two instruments, the Total Irradiance Monitor (TIM), and the spectral Irradiance Monitor (SIM). TIM measures total brightness and SIM measures spectral irradiance over a wavelength range that includes 96% of the energy in the solar spectrum. Both instruments are similar to those used for the TSIS-1 mission onboard the International Space Station.

Where to watch

No stream announced yet. They usually appear a day or two before launch. Search YouTube

Updates

  • Launch moved to flying on Electron, NET early 2027. source
  • NET 2027. source
  • NET October 2025. source
  • NET May 2025. source
  • Adding launch NET August 2024 source

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Before liftoff
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