THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - TSIS-1/SIM -
Full Name Total Solar and Spectral Irradiance Sensor 1 - Spectral Irradiance Monitor Status Operational
Instrument Agencies NASA, NOAA Maturity Medium Heritage
Instrument Type Earth radiation budget radiometers Geometry
Instrument Technology Solar irradiance monitor Sampling Imaging
Data Access Open Access Data Format ASCII, HDF-5
Measurements and Applications Measures solar spectral irradiance in the 0.2 - 2 µm range.
Resolution Summary
Swath Summary Looks at the sun every orbit, providing 15 measurements per day.
Accuracy Summary Estimated uncertainties between 200-460nm = 0.42%, between 460-2400nm = 0.24%. 
Waveband Summary UV - SWIR: 0.2 - 2 µm
UV (~0.01 µm - ~0.40 µm)
VIS (~0.40 µm - ~0.75 µm)
NIR (~0.75 µm - ~1.3 µm)
SWIR (~1.3 µm - ~3.0 µm)
Instrument Measurements
Measurements Overview
CategoryParameter
Radiation budgetDownwelling (Incoming) solar radiation at TOA
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Earth Radiation Budget click here click here search ECV Inventory records
Instrument Missions
NPOESS-1 - National Polar-orbiting Operational Environmental Satellite System - 1 (2013 - 2020)
TSIS-1-on-ISS - International Space Station/Total Solar and Spectral Irradiance Sensor Mission (2017 - 2023)
NPOESS-6 - National Polar-orbiting Operational Environmental Satellite System - 4 (2019 - 2024)
Free Flyer-2 - JPSS Free Flyer-2 (2021 - 2026)
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