Launch date: December 3, 2018
End Date: February 2022
Lead Institution: LASP
Lead Funding Agency: NASA
Partners: University of Colorado Boulder, NASA Earth Science Division, NIST Synchrotron Ultraviolet Radiation Facility (SURF), Spaceflight Industries
Radiative energy from the Sun establishes the basic climate state of the Earth’s surface and atmosphere and defines the terrestrial environment that supports all life on the planet. Solar variability occurs on a wide range of scales and affects atmospheric dynamics and chemistry along with photosynthetic processes in the biosphere–driving interactions among the atmosphere, oceans, ice, and land. The continuous measurement of solar spectral irradiance (SSI) is essential to interpreting how the Earth system responds to solar spectral variability and ultimately identifying the physical mechanisms of response. Fundamental objectives related to SSI monitoring extend to a broad science community that includes studies on Earth energy budget, process-oriented remote sensing applications, climate and atmospheric modeling, and atmospheric composition.
The current implementation for continuous SSI monitoring is the Total and Spectral Solar Irradiance Sensor (TSIS-1) Spectral Irradiance Monitor (SIM) that began operations in March 2018. The TSIS-1 SIM – CSIM operational overlap offers SSI measurement advantages that have not been previously exploited. Because of the common, traceable calibration tie between the two instruments, operational overlap allows for a unique cross-calibration opportunity to verify and validate, on-orbit, the absolute accuracy as well as temporal and spectral stability of the CSIM mission concept.
The LASP cubesat mission operations and data systems teams provided the commanding, downlink, data capture, and data reduction for all three years of CSIM operations.
The CSIM bus is till operating and used as a training platform for LASP Operation students.
The CSIM instrument measures the top-of-the-atmosphere solar spectral irradiance (SSI) from 200 nm to 2600 nm.
The data are provided on the LISIRD site: https://lasp.colorado.edu/lisird/data/csim_ssi_l3/
Or available for direct download: