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UARS Particle Environment Monitor (PEM) Level 3AT V001 (UARPE3AT) at GES DISC
Entry ID: GES_DISC_UARPE3AT_V001

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Summary
Abstract: The Particle Environment Monitor (PEM) Level 3AT data product consists of daily, 65.536 second interval time-ordered, vertical profiles of electron, proton and x-ray energy deposition rates. PEM was made up of four instruments: the Atmospheric X-Ray Imaging Spectrometer (AXIS), the High Energy Particle Spectrometer (HEPS), the Medium Energy Spectrometer (MEPS), and the Vector Magnetometer (VMAG). PEM was flown on NASA's Upper Atmosphere Research Satellite (UARS) to measure the type, amount, energy, and distribution of charged particles injected into the Earth's thermosphere, mesosphere, and stratosphere. PEM x-ray data are processed with the version 3 algorithm, and the electron and proton data are version 4.

The PEM level 3AT data consist of 18 granules per day. A data granule is defined as one PEM subtype per day. The following subtypes are available:

1. EDEP3AT_P01 - x-ray pixel 01 energy deposition
2. EDEP3AT_P02 - x-ray pixel 02 energy deposition
3. EDEP3AT_P03 - x-ray pixel 03 energy deposition
4. EDEP3AT_P04 - x-ray pixel 04 energy deposition
5. EDEP3AT_P05 - x-ray pixel 05 energy deposition
6. EDEP3AT_P06 - x-ray pixel 06 energy deposition
7. EDEP3AT_P07 - x-ray pixel 07 energy deposition
8. EDEP3AT_P08 - x-ray pixel 08 energy deposition
9. EDEP3AT_P09 - x-ray pixel 09 energy deposition
10. EDEP3AT_P10 - x-ray pixel 10 energy deposition
11. EDEP3AT_P11 - x-ray pixel 11 energy deposition
12. EDEP3AT_P12 - x-ray pixel 12 energy deposition
13. EDEP3AT_P13 - x-ray pixel 13 energy deposition
14. EDEP3AT_P14 - x-ray pixel 14 energy deposition
15. EDEP3AT_P15 - x-ray pixel 15 energy deposition
16. EDEP3AT_P16 - x-ray pixel 16 energy deposition
17. EDEP3AT_ELEC - electron energy deposition
18. EDEP3AT_PROT - proton energy deposition

The x-ray pixel subtypes are grouped together in a single tar file for each day, the electron and proton are available as individual files per day. The units for energy deposition rate are in [erg/cm**3/sec]. The PEM data are on the UARS standard altitude levels (in km) given by:

z(i) = 5 * i, i <= 12
z(i) = 60 + (i - 12) * 3, 13 <= i <= 32
z(i) = 120 + (i - 32) * 10, 33 <= i <= 50

The data files are available in a binary record oriented format.

Related URL
Link: GET DATA > ON-LINE ARCHIVE
Description: Access the data via anonymous FTP.


Link: GET DATA > MIRADOR
Description: Mirador is a search and download interface of data archived at the NASA GES DISC.


Link: GET DATA > REVERB
Description: Reverb, the ECHO client, allows one to search and retrieve data across multiple data archive centers.


Link: VIEW RELATED INFORMATION > USER'S GUIDE
Description: README Document


Geographic Coverage
 N: 80.0 S: -80.0  E: 180.0  W: -180.0
 Min Altitude: 5 KM  Max Altitude: 400 KM

Data Set Citation
Dataset Originator/Creator: Winningham, David J., et al.
Dataset Title: UARS Particle Environment Monitor (PEM) Level 3AT
Dataset Series Name: UARPE3AT
Dataset Release Date: 1994
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)
Version: 001
Data Presentation Form: Digital Science Data
Online Resource: http://disc.gsfc.nasa.gov/datacollection/UARPE3AT_V001.html


Temporal Coverage
Start Date: 1991-10-01
Stop Date: 1999-12-31


Location Keywords
GEOGRAPHIC REGION > GLOBAL
VERTICAL LOCATION > MESOSPHERE
VERTICAL LOCATION > STRATOSPHERE
VERTICAL LOCATION > THERMOSPHERE


Data Resolution
Latitude Resolution: 60 km width along track at nadir
Longitude Resolution: 100 km width across track at nadir
Vertical Resolution: 3 - 5 km
Temporal Resolution: Twice daily; ascending and descending nodes; 36-day yaw cycle


Science Keywords
SUN-EARTH INTERACTIONS >SOLAR ENERGETIC PARTICLE PROPERTIES >ENERGY DEPOSITION    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
IMAGERY/BASE MAPS/EARTH COVER


Platform
UARS >Upper Atmosphere Research Satellite    [Information]


Instrument
PEM >Particle Environment Monitor    [Information]


Project
UARS >Upper Atmosphere Research Satellite    [Information]


Keywords
ELECTRONS
PROTONS
X-RAYS


Data Set Progress
COMPLETE


Originating Center
UARS CDHF


Data Center
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA    [Information]
Data Center URL: http://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Distribution
Distribution_Media: FTP/HTTP
Distribution_Size: 42 MB
Distribution_Format: Binary
Fees: None


Personnel
JAMES EDWARD JOHNSON
Role: DIF AUTHOR
Phone: 301-614-5121
Email: James.Johnson at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


J. DAVID WINNINGHAM
Role: INVESTIGATOR
Phone: (210) 522-3075
Email: dwinningham at swri.edu
Contact Address:
Space Science Department
Southwest Research Institute
P.O. Drawer 28510
City: San Antonio
Province or State: TX
Postal Code: 78228-0510
Country: USA


GES DISC HELP DESK SUPPORT GROUP
Role: TECHNICAL CONTACT
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Publications/References
Chenette, D.L., D.W.Datlowe, W.L.Imhof, T.L.Schumaker, and J.D.Tobin, Global spectroscopy and imaging of atmospheric X-ray bremsstrahlung: Instrumentation and initial results from the PEM/AXIS instrument aboard the Upper Atmosphere Research Satellite, SPIE Vol. 1745, 1992.

Reber, C. A., C. E. Trevathan, R. J. McNeal, and M. R. Luther, The Upper Atmosphere Research Satellite (UARS) Mission, J. Geophys. Res. 98, D6, 10643-10647, 1993.

Winningham, J. D., et al., The UARS Particle Environment Monitor, J. Geophys. Res. 98, D6, 10763-10775, 1993.

"Instrument Systems Description Document for the UARS Particle Environment Monitor (PEM)," Southwest Research Institute Document 7845-IS-1, San Antonio, Texas, (October 1990).

Creation and Review Dates
DIF Creation Date: 2007-02-26
Last DIF Revision Date: 2016-01-20
Future DIF Review Date: 2015-08-01



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