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Instrument details
Acronym
PEM/AXIS
Full name
Particle Environment Monitor / Atmospheric X-ray Imaging Spectrometer
Purpose
To measure X-ray spectra from the Earth atmosphere
Short description
Imaging spectrometer for X-rays of energy 3-100 keV in the range 0.012-0.41 nm.
Background
Component of the UARS Particle Environment Monitor (PEM)
Scanning Technique
Imagery at 8-degree intervals across the nadir from a drifting LEO
Resolution
80 km at s.s.p.
Coverage / Cycle
Global daily. Sampling at 60 s intervals
Mass
Power
Data Rate
Providing Agency
NASA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
1991-12-12 to 2005-12-14
Last update:
2017-05-21
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 Space radiometer or spectrometer
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
X-ray flux spectrum 3 - high No specific limitation. Earth's limb observed, high spectral resolution
X-ray flux 3 - high No specific limitation. X-ray imager observing the Earth's surface to detect Terrestrial Gamma-ray Flashes (TGF)
X-ray sky image 3 - high No specific limitation. Earth's limb observed, spectrometry with high spatial resolution
Instrument: PEM/AXIS