UARS PEM Level 2 AXIS 2 V001 (UARPE2AXIS2) at GES DISC

The UARS Particle Environment Monitor (PEM) level 2 Atmosphere X-Ray Imaging Spectrometer (AXIS) unit 2 daily product contains the X-ray high-resolution spectral data converted to number intensity units from the AXIS2 pixels mounted on the UARS body. PEM was flown on the UARS spacecraft to measure the type, amount, energy, and distribution of charged particles injected into the Earth's thermosphere, mesosphere, and stratosphere.

The PEM AXIS2 X-ray data cover roughly the energy range from 2 keV to 300 keV. There are eight AXIS2 pixels mounted in the AXIS2 housing, each viewing different directions. The AXIS2 pixels are aligned on the spacecraft to project about 45 degrees toward the +x axis direction from the Earthward pointing direction (+z axis). Each pixel of AXIS2 is staggered about the 45 degree direction in an every-other fashion. Pixel 1 is closest to the center line of the spacecraft and Pixel 8 is furtherest away; however, their ground projection is dependent on the spacecraft orientation.

There is one data file per day for the PEM AXIS2 product, and the temporal coverage is from Oct. 1, 1991 to Aug. 23, 2005. Spatial coverage for the AXIS2 product ranges between -80 and +80 degrees latitude. The AXIS2 data files are written in network binary format. For more information please review the PEM AXIS2 data format guide.

Data and Resources

Additional Info

Field Value
Maintainer J. WINNINGHAM
Last Updated March 31, 2025, 17:25 (UTC)
Created March 31, 2025, 17:25 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation Winningham, David J., et al.. 2006-06-14. UARPE2AXIS2. Version 001. UARS PEM Level 2 AXIS 2 V001. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/UARPE2AXIS2_001.html. Digital Science Data.
creator Winningham, David J., et al.
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/UARPE2AXIS2_001.png
harvest_object_id 5e25425e-717c-46a7-98bb-f8e9e3244d38
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1273348499-GES_DISC
issued 2006-04-30
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1273348499-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2006-04-30
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name UARPE2AXIS2
source_datajson_identifier true
source_hash fb989730fba04302314fb8af70a8054668e6826669021b0d76e50df77f6ba988
source_schema_version 1.1
spatial -180.0 -80.0 180.0 80.0
temporal 1991-09-30T00:00:00Z/2005-03-08T23:59:59.999Z
theme {UARS,geospatial}