Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.a51e0085k&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #A51E-0085
Physics
1650 Solar Variability, 1694 Instruments And Techniques, 7537 Solar And Stellar Variability, 7538 Solar Irradiance, 7594 Instruments And Techniques
Scientific paper
The NASA/EOS Solar Radiation and Climate Experiment (SORCE) will measure the total and the spectral irradiance from the Sun, continuing the solar data record from the Upper Atmosphere Research Satellite (UARS). Four SORCE instruments provide irradiance measurements at wavelengths from 1 nm to longer than 2000 nm. The Total Irradiance Monitor (TIM) measures total solar irradiance (TSI), similar to the UARS/ACRIM instrument. The TIM will achieve a relative standard uncertainty (1 σ precision) of 100 parts per million (ppm), continuing the 23-year record of TSI measurements. SORCE's two SOLar STellar Irradiance Comparison Experiment (SOLSTICE) instruments are nearly identical to the SOLSTICE flown on UARS. These grating spectrometers monitor the more highly-variable solar ultraviolet irradiance over the wavelength range 120 to 300 nm with a 2 to 5% absolute uncertainty and a capability of making relative solar variability measurements with an accuracy of 0.5% by using stable, blue stars for in-flight calibration. The Spectral Irradiance Monitor (SIM) is a new prism spectrometer providing the first continuous solar spectral irradiance measurements from 200 to 2000 nm with 300 ppm uncertainty. The XUV Photometer System (XPS) covers 1 to 35 nm using 9 spectral bandpass filters to measure the large solar irradiance variations in the extreme ultraviolet with a ~20% accuracy. Launching in July of 2002 with a mission life goal of 5 years, SORCE will extend the UARS solar irradiance database in time as well as spectral region. SORCE data will be available via NASA/GSFC's Distributed Active Archive Center (DAAC) as well as from LASP's web site (http://lasp.colorado.edu/sorce).
Adda M.
Harder Jens
Köpp Gene
Lawrence Gareth
McClintock B.
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