GPM_1CTRMMTMI_04

GPM TMI Common Calibrated Brightness Temperatures L1C 1.5 hours 13 km V04 (GPM_1CTRMMTMI) at GES DISC

Version 04
  • Abstract
    All 1C products have a common L1C data structure, simple and generic. Each L1C swath includes scan time, latitude and longitude, scan status, quality, incidence angle, Sun glint angle, and the intercalibrated brightness temperature (Tc). One or more swaths are included in a product. The radiometer data are recalibrated to a common basis so that precipitation products derived from them are consistent. 1CSSMIS contains common calibrated brightness temperature from the SSMIS passive microwave instruments flown on the DMSP satellites. Swath S1 has 3 low frequency channels (19V 19H 22V). Swath S2 has 2 low frequency channels (37V 37H). Swath S3 has 4 high frequency channels (150H 183+/-1H 183+/-3H 183+/-7H). S4 has 2 high frequency channels (91V 91H). All the above frequencies are in GHz. Earth observations for all four swaths are taken during a 144o segment of the instrument rotation when SSMIS scans in the direction of foreward satellite motion. We define the spacecraft vector (v) at the center of this segment.
  • Version Description
    Not provided

Data Identification Fields:

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    Data Dates
    Creation
    Last Revision
    Processing Level

    1

    Quality
    The L1C products contain brightness temperatures that have been intercalibrated to a common basis and are no longer the original instrument brightness temperatures. Channels not relevant to precipitation retrievals are not included. The recalibration for most radiometers is a simple 2-point, linear adjustment. For the water vapor sounding channels, this is a simple offset. In the case of AMSR2, the adjustments are piecewise linear with more than two points to approximate the non-linear nature of the calibration of that instrument. The goal is to make the brightness temperatures consistent to 0.1K. That is not to say the calibration is accurate to this level; there are no suitable standards to assure absolute accuracy. The 0.1K level of consistency has been achieved in most cases, but in the case of the channels near 90 GHz, the uncertainty is somewhat greater. Also, some radiometers are not stable enough to permit this level of consistency.
    Collection Progress

    In Work

    Use Constraints
    The data in the 1AGMI file are not calibrated at all. Do not use these data unless they can be correctly calibrated and interpreted.
    Access Constraints

    None

    Publication References
    • Publication reference title not provided
        Not provided
    • Publication reference title not provided
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    • Publication reference title not provided
        Not provided
Related URLs
    Science Keywords
    • EARTH SCIENCE
    • ATMOSPHERE
    • ATMOSPHERIC WATER VAPOR
    • EARTH SCIENCE
    • ATMOSPHERE
    • PRECIPITATION
    • EARTH SCIENCE
    • SPECTRAL/ENGINEERING
    • MICROWAVE
    • BRIGHTNESS TEMPERATURE
Other Descriptive Keywords
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Ancillary Keywords
  • Atmosphere, Precipitation, Water Vapor
ISO Topic Categories
  • CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Additional Attributes
  • Data Granularity
    STRING
    The time coverage of individual data granules.
    Resolution Range Begin Range End Unit of Measure Accuracy

Acquisition Information Fields:

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Platforms
  • Earth Observation Satellites
    GPM
    Instruments
    • SSMIS
Projects
Project Short Name Campaigns Project Dates
GPM No campaigns listed. No dates provided.

Temporal Information Fields:

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Spatial Information Fields:

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Location Keywords
    • GEOGRAPHIC REGION
    • TROPICS

Data Centers

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  • NASA/GSFC/SED/ESD/GCDC/GESDISC
    ARCHIVER
    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

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

Data Contacts

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  • GEORGE
    Investigator
    GEORGE HUFFMAN

    NASA Goddard Space Flight Center
    Mailstop 612
    Greenbelt, MD 20771

    • Email
    • 301-614-6308
    • 301-614-5492
  • ANDREY
    Metadata Author
    ANDREY SAVTCHENKO

    Distributed Active Archive Center Global Change Data Center
    Code 610.2
    NASA Goddard Space Flight Center
    Greenbelt, MD 20771

  • Data Center Contact
    GES DISC Help Desk Support Group

    NASA/GSFC/SED/ESD/GCDC/GESDISC

    Goddard Earth Sciences Data and Information Services Center
    Code 610.2
    NASA Goddard Space Flight Center
    Greenbelt, MD 20771

    • Email
    • 301-614-5224
    • 301-614-5268

Collection Citations Fields:

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