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- Title
Cross-Calibration of TIMED SEE and SOHO EIT Irradiances.
- Authors
Hock, R. A.; Eparvier, F. G.
- Abstract
Absolutely calibrated solar images are necessary for a variety of solar physics problems, such as the identification of solar variability sources and the derivation of differential emission measure (DEM) maps. SOHO EIT is absolutely calibrated by using TIMED SEE spectra to provide a method of determining physical values of irradiance for EIT images. EIT images from 1 April 2002 to 15 March 2005 in the 28.4- and 30.4-nm channels are compared to SEE daily spectra from the same time period. The resulting fitted EIT irradiances are well correlated to SEE irradiance measurements and are within the uncertainties of both instruments. The new cross-calibration results are compared to the currently used calibration based on the UARS SUSIM Mg ii index.
- Subjects
SOLAR research; CALIBRATION; SOLAR oscillations; SPECTRUM analysis; SPECTRAL irradiance
- Publication
Solar Physics, 2008, Vol 250, Issue 1, p207
- ISSN
0038-0938
- Publication type
Article
- DOI
10.1007/s11207-008-9203-y