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Laboratory for Atmospheric and Space Physics

XPS Anomaly

The XPS filter wheel had an anomaly on day 2002/205 whereby it became fixed in position 6. The only solar measurements since then are from XP channels 1 (0.1-7 nm), 5 (0.1-10 nm), and 10 (0.1-7 nm).

The spectral gap between 10-27 nm will be filled for SEE Level 3 data products using a model of the solar XUV irradiance based on the historical XPS data. The SORCE XPS, almost identical to the TIMED SEE XPS, was launched in Jan. 2003 and continues the full spectral coverage of the XUV range starting in March 2003.
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