Global Ultraviolet Imager (GUVI) Data from TIMED

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: GUVI Science Team
Publication_Date: 2002
Title: Global Ultraviolet Imager (GUVI) Data from TIMED
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Laurel, MD
Publisher: Johns Hopkins University/Applied Physics Laboratory
Other_Citation_Details:
Online_Linkage: http://guvi.jhuapl.edu/home.html
Description:
Abstract:
The Global Ultraviolet Imager (GUVI) is one of four instruments that constitute the TIMED spacecraft, the first mission of the NASA Solar Connections program. Data from the GUVI instrument is procesed on the ground to generate data products at the different levels. Level 1A is a "virtual" data product file in the sense that the data is not directly outputted to a data file. It consists of raw sensor data at full resolution. Level 1B is also a "virtual" data product file and it contains uncompressed instrument data, using a simple constrained maximum error compression algorithm that achieves modest compression factors, and has been calibrated to convert to unts of radiance within the specified "color" of the GUVI data (Rayleighs/color). The Level 1C data products contain data directly measured by the sensors, such as photometer counts, uncertainties, light intensities and pointing information derived from the GUVI raw sensor data and the TIMED Satellite ephemeris data. The data are gridded into a GUVI based coordinate system consisting of the along orbit position of the sensor and the angle of the scan from the nadir position. This gridding eliminates overlap from scan to scan due to the large instantaneous field-of-view of GUVI (about 12 degrees) and involves coaddition to place the values on a uniform instrument shared grid. The data is then determined whether its from day, night, aurora or twilight pixels. The Level 2B data products contain environmental parameters which are derived from the sensor data by scientific algorithms specific to day, night, and auroral regions. The data is averaged into 100 x 100 km2 resolution to form "super pixels" on the day and night and 25 x 25 km2 for the auroral products. The "super pixels" are then processed by the algorithms to yield geophysical parameters which are calculated from the radiance of the different colors. The GUVI data product files are stored in full orbit increments according to the date and revolution number and data product level type. These files are in NetCDF which is a self describing platform independent binary format. See http://guvi.jhuapl.edu/data/understanding.shtml
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Online publications and a list of references is avilable from: "http://guvi.jhuapl.edu/science/publication.shtml"
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20020217
Ending_Date: Unknown
Currentness_Reference:Unknown
Status:
Progress: In Work
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: 90.0
South_Bounding_Coordinate: -90.0
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_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > TEMPERATURE PROFILES
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > ULTRAVIOLET WAVELENGTHS > SENSOR COUNTS
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > ULTRAVIOLET WAVELENGTHS > ULTRAVIOLET FLUX
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > ULTRAVIOLET WAVELENGTHS > ULTRAVIOLET RADIANCE
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > AURORAE
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE FLUX > ELECTRON FLUX
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE FLUX > PROTON FLUX
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR ULTRAVIOLET EMISSIONS
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > MOLECULAR NITROGEN
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS > MOLECULAR OXYGEN
Theme_Keyword: TIMED > THERMOSPHERE, IONOSPHERE, MESOSPHERE ENERGETICS AND DYNAMICS
Theme_Keyword: GUVI > GLOBAL ULTRAVIOLET IMAGER
Theme_Keyword: TIMED > THERMOSPHERE, IONOSPHERE, MESOSPHERE ENERGETICS AND DYNAMICS
Theme_Keyword: STP > NASA SOLAR TERRESTRIAL PROBES PROGRAM
Theme_Keyword: Solar Euv Flux Index
Theme_Keyword: Q(env)
Theme_Keyword: Effective Energy Flux
Theme_Keyword: Effective Average Energy
Theme_Keyword: Height Of Peak Ionization Rate
Theme_Keyword: Neutral Density Profiles
Theme_Keyword: Guvi
Theme_Keyword: Boundary Specification
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: IMAGERY/BASE MAPS/EARTH COVER
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: GEOGRAPHIC REGION > GLOBAL
Place_Keyword: VERTICAL LOCATION > IONOSPHERE
Place_Keyword: VERTICAL LOCATION > MESOSPHERE
Place_Keyword: VERTICAL LOCATION > THERMOSPHERE
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ANDREW B. CHRISTENSEN
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: The Aerospace Corporation
Address: 2350 E. El Segundo Blvd.
City: El Segundo
State_or_Province: CA
Postal_Code: 90245-4691
Country: USA
Contact_Voice_Telephone: 310-336-7084
Contact_Electronic_Mail_Address: andy.christensen@aero.org
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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
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: JHU/APL/GUVI > Global Ultraviolet Imager Team, Applied Physics Laboratory, Johns Hopkins University
Contact_Person: ROBIN BARNES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Applied Physics Laboratory
Address: Johns Hopkins University
Address: 11100 Johns Hopkins Road
City: Laurel
State_or_Province: MD
Postal_Code: 20723-6099
Country: USA
Contact_Voice_Telephone: 240-228-8134
Contact_Electronic_Mail_Address: Robin.Barnes@jhuapl.edu
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: JHU/APL/TIMED/SDS > TIMED Science Data System, Applied Physics Laboratory, Johns Hopkins University
Contact_Person: STUART NYLAND
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Applied Physics Laboratory
Address: Johns Hopkins University
Address: 11100 Johns Hopkins Road
City: Laurel
State_or_Province: MD
Postal_Code: 20723-6099
Country: USA
Resource_Description: TIMED_GUVI
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: netCDF
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://guvi.jhuapl.edu/home.html
Access_Instructions:
DATA CENTER URL
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.timed.jhuapl.edu/WWW/scripts/mdc_home.p...
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://guvi.jhuapl.edu/data/dataproducts.shtml
Access_Instructions:
Access to GUVI TIMED data at JHU/APL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.timed.jhuapl.edu/register/index.html
Access_Instructions:
TIMED Science Data System (registration required)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://guvi.jhuapl.edu/home.html
Access_Instructions:
GUVI Home Page, related data and instrument documentation
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.timed.jhuapl.edu/
Access_Instructions:
TIMED Home Page
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20031013
Metadata_Review_Date: 20090803
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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