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Instrument details
Acronym
EXIS
Full name
Extreme Ultraviolet Sensor / X-Ray Sensor Irradiance Sensors
Purpose
To monitor EUV and X-rays from the solar disk
Short description
Two units: EUVS (EUV Sensor) and XRS (X-Ray Sensor). EUVS measures EUV flux in 5 channels of the 5-127 nm range [including Fe-XV at 28.4 nm, He-II at 30.4 nm and H-Lyman-alpha at 121.6 nm]. XRS measures soft-X-rays fluxes in two bands, 0.05-0.4 and 0.1-0.8 nm
Background
Evolution of SXI on GOES 12 to 15
Scanning Technique
Sun pointing from GEO
Resolution
N/A (full disk)
Coverage / Cycle
Full disc at 2 s intervals (X-ray) and 33 s (EUV)
Mass
30 kg
Power
40 W
Data Rate
7.2 kbps
Providing Agency
NOAA
Instrument Maturity
Backed by strong heritage
Utilization Period:
2017-12-18 to ≥2027
Last update:
2017-05-18
Detailed characteristics
Satellites this instrument is flying on
Note: a red tag indicates satellites no longer operational, a
green tag indicates operational satellites, a blue tag indicates
future satellites
Instrument classification
Solar and space environment monitors Solar activity monitor
WIGOS Subcomponents
No WIGOS subcomponents have been defined.
Mission objectives
Tentative Evaluation of Measurements
The following list indicates which measurements can typically be
retrieved from this category of instrument. To see a full Gap Analysis by Variable,
click on the respective variable.
Note: table can be sorted by clicking on the column headers
Variable Relevance for measuring this variable Operational limitations Explanation
Solar X-ray flux 3 - high No specific limitation. Few channels, wide dynamic range
Solar EUV flux 1 - primary No specific limitation. Several channels, wide dynamic range
Instrument: EXIS