| definition |
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The EGS is a Rowland-circle grating spectrograph that makes
solar extreme ultraviolet (EUV) spectral irradiance
measurements. The original EGS made measurements from 30 to 115
nm with 0.1 nm spectral resolution. This EGS version made
measurements in 1988, 1989, 1992, 1993, and 1994, and it was
lost during the failure of the Conestoga / METEOR satellite
launch. The new EGS, the TIMED protoflight version, covers the
spectral range from 20 to 200 nm with 0.2 nm spectral
resolution.
[Summary provided by UCAR.]
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