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Calibration of the Extreme UV/X-ray Irradiance Sensor (EXIS) for the Geostationary Operations Environment Satellite R-Series Program (GOES-R)


Calibrations of the The Extreme ultraviolet/X-ray Irradiance Sensor (EXIS), which will be installed on the Geostationary Operations Environment Satellite R-Series (GOES-R) are performed using beamline 2 at SURF.


The EXIS instrument detects solar soft X-ray irradiance (XRS) and solar extreme ultraviolet (EUVS) spectral irradiance. XRS helps predict proton events and monitors solar flares that can disrupt communications and degrade navigational accuracy. EUVS monitors solar variations that directly affect satellite drag/tracking and ionospheric changes, which impact communication and navigation operations. EXIS will provide one of the most important observations for early warning of space weather events.

EXIS consists of an Extreme Ultraviolet Sensor (EUVS), an X-Ray sensor (XRS) and a combined EUVS/XRS electronics box (EXEB).

End Date:


Lead Organizational Unit:



Frank Eparvier, EXIS Lead Scientist, Laboratory for Atmospheric and Space Physics (LASP)

Facilities/Tools Used:


Mitch Furst
Alex Farrell


General Information:
301-975-6378 Telephone

100 Bureau Drive, MS 8411
Gaithersburg, MD 20899-8411