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    • CYGNSS Level 1 Full Delay Doppler Map Data Record Version 3.0

    Metadata Updated: December 7, 2023

    This Level 1 (L1) dataset contains the Version 3.0 (v3.0) Full Delay Doppler Map (DDM) sensor data from the Delay Doppler Mapping Instrument aboard the CYGNSS satellite constellation. The primary CYGNSS instrument, also known as the Delay-Doppler Mapping Instrument (DDMI), measures the incoming radio frequency (RF) streams from three input antenna channels (2 nadir oriented science antennas and one zenith oriented navigation antenna) and processes them in real time into DDMs, which are two-dimensional maps of the signal scattered from the Earth surface as a function of propagation time delay and Doppler frequency shift. DDMs are normally sampled over a restricted range of delay and Doppler values centered on the values at the specular point of reflection. The bit resolution of scattered signal strength is also truncated by a lossy data compression algorithm. Full DDMs are sampled over a wider range of delay and Doppler values and retain their full (lossless) bit resolution. Full DDM data records are typically 10-15 min in duration and are initiated by ground commands to coincide with an overpass by one of the spacecraft of a target area of interest. This version supersedes the Full DDM Version 1.0 (https://doi.org/10.5067/CYGNS-L1FDD) for data retrieved during or after August 2018. For data retrieved prior to August 2018, users will need to continue using the Full DDM Version 1.0. This version links the Full DDMs to the CYGNSS v3.0 L1 files (https://doi.org/10.5067/CYGNS-L1X30) whereas the version 1.0 Full DDM linked the Full DDMs to the CYGNSS v2.1 L1 files (https://doi.org/10.5067/CYGNS-L1X21). The calibration of the Full DDMs has not been modified for this release.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    References

    https://doi.org/10.1109/JSTARS.2018.2832981

    Dates

    Metadata Created Date December 1, 2022
    Metadata Updated Date December 7, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Thumbnail

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 1, 2022
    Metadata Updated Date December 7, 2023
    Publisher NASA/JPL/PODAAC
    Maintainer
    Identifier C2205121474-POCLOUD
    Data First Published 2020-11-13
    Language en-US
    Data Last Modified 2020-11-13
    Category CYGNSS, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation CYGNSS. 2020-11-30. CYGNSS Level 1 Full Delay Doppler Map Data Record. Version 3.0. CYGNSS Level 1 Full Delay Doppler Map Data Record Version 3.0. PO.DAAC. Archived by National Aeronautics and Space Administration, U.S. Government, PO.DAAC. https://doi.org/10.5067/CYGNS-L1F30. https://cygnss.engin.umich.edu/. CYGNSS, PO.DAAC, 2020-11-30, CYGNSS Level 1 Full Delay Doppler Map Data Record Version 3.0, https://cygnss.engin.umich.edu/.
    Creator CYGNSS
    Graphic Preview Description Thumbnail
    Graphic Preview File https://podaac.jpl.nasa.gov/Podaac/thumbnails/CYGNSS_L1_FULL_DDM_V3.0.jpg
    Harvest Object Id 1a2ede9c-0973-446e-b9e5-889467e7e364
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/CYGNS-L1F30
    Metadata Type geospatial
    Old Spatial -180.0 -40.0 180.0 40.0
    Program Code 026:001
    Related Documents https://doi.org/10.1109/JSTARS.2018.2832981
    Release Place PO.DAAC
    Series Name CYGNSS Level 1 Full Delay Doppler Map Data Record
    Source Datajson Identifier True
    Source Hash 80c715c6c3fc09b78c21393210345284e8e04f8ad636bf9d2db8c83207b641d7
    Source Schema Version 1.1
    Spatial
    Temporal 2018-08-06T00:00:01Z/2023-02-28T00:00:00Z

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