Global Ultraviolet Imager (GUVI) Data from TIMED

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

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

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

Spatial_Reference_Information:

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

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