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  • DMSP OLS - Operational Linescan System

    Metadata Updated: September 26, 2015

    Visible and infrared imagery from DMSP Operational Linescan System (OLS) instruments are used to monitor the global distribution of clouds and cloud top temperatures twice each day. The archive data set consists of low resolution global and high resolution regional, imagery recorded along a 3,000 km scan, satellite ephemeris and solar and lunar information. Infrared pixel values correspond to a temperature range of 190 to 310 Kelvins in 256 equally spaced steps. Onboard calibration is performed during each scan. Visible pixels are relative values ranging from 0 to 63 rather than absolute values in Watts per m^2. Instrumental gain levels are adjusted to maintain constant cloud reference values under varying conditions of solar and lunar illumination. Telescope pixel values are replaced by Photo Multiplier Tube (PMT) values at night. A telescope pixel is 0.55 km at high resolution (fine mode) and 2.7 km at low resolution(smooth mode). Low resolution values are the mean of the appropriate 25 high resolution values.

    Access & Use Information

    License: U.S. Government Work

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    Dates

    Metadata Date September 18, 2015
    Metadata Created Date September 26, 2015
    Metadata Updated Date September 26, 2015
    Reference Date(s) January 1, 1992 (publication)
    Frequency Of Update daily

    Metadata Source

    Harvested from NOAA CSW Harvest Source

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 18, 2015
    Metadata Created Date September 26, 2015
    Metadata Updated Date September 26, 2015
    Reference Date(s) January 1, 1992 (publication)
    Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Access Constraints Use Constraints: None, Access Constraints: No Constraints
    Bbox East Long 180.000000
    Bbox North Lat 90.000000
    Bbox South Lat -90.000000
    Bbox West Long -180.000000
    Coupled Resource
    Frequency Of Update daily
    Guid gov.noaa.ngdc.stp.dmsp:G01119
    Harvest Object Id 804f65aa-1756-42ab-af2d-2b44e64c685c
    Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
    Harvest Source Title NOAA CSW Harvest Source
    Licence While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
    Metadata Language
    Metadata Type geospatial
    Progress underDevelopment
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1975-04-01

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