UARS Particle Environment Monitor (PEM) Level 3AT

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Southwest Research Institute, NASA/GSFC
Publication_Date: Unknown
Title: UARS Particle Environment Monitor (PEM) Level 3AT
Edition: 001
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
Online_Linkage: http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?tree=project&project=UARS&dataGroup=PEM&dataset=PE3AT
Description:
Abstract:
The Particle Environment Monitor (PEM) on NASA's Upper Atmosphere Research Satellite (UARS) measures the type, amount, energy, and distribution of charged particles injected into the Earth's thermosphere, mesosphere, and stratosphere. DESCRIPTION: PEM consists 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). AXIS produces global images of brehmstrahlung X-rays produced by energetic electrons incident upon the atmosphere in the 3 to 100 keV range. The instrument is made up of 16 silicon detector modules that view the Earth limb-to-limb. The HEPS and MEPS instruments provide in-situ measurements of precipitating electrons and protons. HEPS measures electrons in 32 logarithmic steps from 30 keV to 5000 keV, and protons are measured in 32 logarithmic steps from 0.10 MeV to 150 MeV. The MEPS instrument measures the local particle population in the energy range from 1 eV to 32000 eV, generating a 31 point logarithmic energy spectra every 2 seconds. MEPS consisted of five analyzer heads that determined the electron and ion population. Finally, the VMAG instrument observes the local magnetic field using a 3-axis fluxgate magnetometer. The PEM instruments are distributed across the UARS spacecraft. Two HEPS (HEPS1 and HEPS2), one MEPS (ZMEPS), and the VMAG instrument are located on a zenith looking boom, called the Zenith Energetic Particle System (ZEPS). An Earth pointing boom, the Nadir Energetic Particle System (NEPS), contains one HEPS (HEPS3) and one MEPS (NMEPS). The AXIS instrument is mounted separately on the forward part of the UARS platform. DATA PRODUCTS: PEM_L3AT_DAILY -------------- The PEM level 3AT data are time-ordered profiles spaced at intervals of 1 UARS minute (65.536 seconds), or approximately 495 km along the tangent track. The level 3AT format is common to all UARS instruments to allow for intercomparison. 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_ELEC - electron energy deposition 2. EDEP3AT_P01 - x-ray pixel 01 energy deposition 3. EDEP3AT_P02 - x-ray pixel 02 energy deposition 4. EDEP3AT_P03 - x-ray pixel 03 energy deposition 5. EDEP3AT_P04 - x-ray pixel 04 energy deposition 6. EDEP3AT_P05 - x-ray pixel 05 energy deposition 7. EDEP3AT_P06 - x-ray pixel 06 energy deposition 8. EDEP3AT_P07 - x-ray pixel 07 energy deposition 9. EDEP3AT_P08 - x-ray pixel 08 energy deposition 10. EDEP3AT_P09 - x-ray pixel 09 energy deposition 11. EDEP3AT_P10 - x-ray pixel 10 energy deposition 12. EDEP3AT_P11 - x-ray pixel 11 energy deposition 13. EDEP3AT_P12 - x-ray pixel 12 energy deposition 14. EDEP3AT_P13 - x-ray pixel 13 energy deposition 15. EDEP3AT_P14 - x-ray pixel 14 energy deposition 16. EDEP3AT_P15 - x-ray pixel 15 energy deposition 17. EDEP3AT_P16 - x-ray pixel 16 energy deposition 18. EDEP3AT_PROT - proton energy deposition Units for energy deposition rate are in [erg/cm**3/sec]. The horizontal resolution of the level 3AT data product is about 495 km along the tangent track. The vertical resolution for the level 3AT PEM profiles is defined by the UARS 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 electron and proton energy deposition level 3AT data are produced from the level 2 HEPS and MEPS data, and gridded to the 65.535 second level 3AT format. Data is only produced at times when there are simultaneous HEPS and MEPS measurements. For higher resolution there is the special PEM level 3TP data product. PEM_L3TP_DAILY -------------- The PEM level 3TP data are a special data product, and should not be confused with the level 3TP parameter files produced for the UARS MLS, HALOE, ISAMS, and WINDII. The PEM 3TP data provide a higher temporal resolution than the level 3AT data, and contain the HEPS and MEPS data in separate files. The HEPS data are at 65.536 second resolution, and the MEPS data are at 2.048 second resolution. The PEM level 3TP data consist of 4 granules per day: 1. HEPS_ELEC_ED - HEPS electron energy deposition 2. HEPS_PROT_ED - HEPS proton energy deposition 3. MEPS_ELEC_ED - MEPS electron energy deposition 4. MEPS_PROT_ED - MEPS proton energy deposition Vertical resolution and data units are the same as for the level 3AT data.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: 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).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19911001
Ending_Date: Unknown
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: 180.0
North_Bounding_Coordinate: 80.0
South_Bounding_Coordinate: -80.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > X-RAY > X-RAY FLUX
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE FLUX > ELECTRON FLUX
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE PROPERTIES > ENERGY DEPOSITION
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE FLUX > PROTON FLUX
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC FIELDS/MAGNETIC CURRENTS
Theme_Keyword: UARS > UPPER ATMOSPHERE RESEARCH SATELLITE
Theme_Keyword: PEM > PARTICLE ENVIRONMENT MONITOR
Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM
Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM
Theme_Keyword: UARS > UPPER ATMOSPHERE RESEARCH SATELLITE
Theme_Keyword: CWIC > CEOS WGISS INTEGRATED CATALOG
Theme_Keyword: Daily Data
Theme_Keyword: Electrons
Theme_Keyword: Energy Depostition
Theme_Keyword: Energy Depostition Rate
Theme_Keyword: Eosdis
Theme_Keyword: Fields And Particles
Theme_Keyword: Idn_node Gsfc/gsfc_daac
Theme_Keyword: Middle Atmosphere
Theme_Keyword: Pem Level 3at
Theme_Keyword: Pem Level 3tp
Theme_Keyword: Protons
Theme_Keyword: Upper Atmosphere
Theme_Keyword: Www
Theme_Keyword: X-ray Flux
Theme_Keyword: X-rays
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: IMAGERY/BASE MAPS/EARTH COVER
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: GEOGRAPHIC REGION > GLOBAL
Place_Keyword: VERTICAL LOCATION > MESOSPHERE
Place_Keyword: VERTICAL LOCATION > STRATOSPHERE
Place_Keyword: VERTICAL LOCATION > THERMOSPHERE
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: J. DAVID WINNINGHAM
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Space Science Department
Address: Southwest Research Institute
Address: P.O. Drawer 28510
City: San Antonio
State_or_Province: TX
Postal_Code: 78228-0510
Country: USA
Contact_Voice_Telephone: (210) 522-3075
Contact_Electronic_Mail_Address: dwinningham@swri.edu
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
Back to Top
Spatial_Reference_Information:
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NASA/GSFC/SED/ESD/GCDC/GESDISC > 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
Contact_Person: GES DISC HELP DESK SUPPORT GROUP
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Goddard Earth Sciences Data and Information Services Center
Address: Code 610.2
Address: NASA Goddard Space Flight Center
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: 301-614-5224
Contact_Facsimile_Telephone: 301-614-5268
Contact_Electronic_Mail_Address: gsfc-help-disc@lists.nasa.gov
Resource_Description: PEM 3AT
Resource_Description: PEM 3TP
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Not Available
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://disc.gsfc.nasa.gov/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://mirador.gsfc.nasa.gov/cgi-bin/mirador/colle...
Access_Instructions:
Access UARS UARPE3AT Data Product
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
ftp://acdisc.gsfc.nasa.gov/data/s4pa/UARS_PEM_Leve...
Access_Instructions:
README
Fees: Not Available
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20070226
Metadata_Review_Date: 20090821
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: JAMES EDWARD JOHNSON
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NASA Goddard Space Flight Center
Address: Code 610.2
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: 301-614-5121
Contact_Electronic_Mail_Address: James.Johnson@nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Back to Top
[ Update this Record ]


Link to Web Site