RSCAT_L2A_25KM_V1.2_1

PODAAC-RSX25-L2A12

Version 1
  • Abstract
    This dataset contains the Version 1.2 ISS-RapidScat Level 2A 25km science data record, which provides surface-flagged sigma-0 in 25km Wind Vector Cells processed using the pulse "egg" Sigma-0 data provided by the Level 1B dataset. Version 1.2 is intended as a replacement and continuation of the Version 1.1 data forward from orbital revolution number 5127, corresponding to 19 August 2015; the overlapping time period starting on 19 August 2015 corresponds to the first time period of the recorded low signal-to-noise ratio (SNR). This Version 1.2 dataset differs from the previous Version 1.1 dataset as follows: 1) L1B sigma-0 has been re-calibrated during the periods of low signal-to-noise ratio (SNR) and 2) during low SNR periods the L1B sigma-0 calibration is determined using re-pointed L1B QuikSCAT data. Due to the circular scan of the SeaWinds instrument the expected number of Sigma-0 cells per WVC is not constant. To minimize the L2A data volume, the Sigma-0 cell data are stored as "lists" for each WVC row, with each list indexed by a "cell_index" array to indicate the cross-track WVC membership of the data. Each cell is then checked for land or ice and flagged accordingly. Attenuation corrections for each Sigma-0 measurement are also provided. Data are provided in single-orbit files in HDF-4 format. RapidScat is a Ku-band dual beam circular rotating scatterometer retaining much of the same hardware and functionality of QuikSCAT, with exception of the antenna sub-system and digital interface to the International Space Station (ISS) Columbus module, which is where RapidScat is mounted. The NASA mission is officially referred to as ISS-RapidScat. Unlike QuikSCAT, ISS-RapidScat is not in sun-synchronous orbit, and flies at roughly half the altitude with a low inclination angle that restricts data coverage to the tropics and mid-latitude regions; the extent of latitudinal coverage stretches from approximately 56 degrees North to 56 degrees South. Furthermore, there is no consistent local time of day retrieval. If you have any questions or concerns, please visit our Forum at https://podaac.jpl.nasa.gov/forum/.

Data Identification Fields:

Toggle Data Identification Fields
    Data Dates
    Creation
    Last Revision
    Processing Level

    2A

    Quality
    Collection Progress

    Not Provided

Related URLs
    Science Keywords
    • Earth Science
    • Spectral/Engineering
    • Radar
    • Sigma Naught
    • None

Acquisition Information Fields:

Toggle Acquisition Information Fields
Platforms
  • SPACECRAFT
    ISS
    Instruments
    • RapidScat

Temporal Information Fields:

Toggle Temporal Information Fields

Spatial Information Fields:

Toggle Spatial Information Fields
    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN CARTESIAN
Location Keywords
    • GEOGRAPHIC REGION
    • GLOBAL

Data Centers

Toggle Data Centers
  • ISS-RapidScat
    PROCESSOR

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

  • PO.DAAC
    ARCHIVER

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

  • SeaWinds Processing and Analysis Center (SeaPAC)
    ARCHIVER

    This data center does not have any addresses listed.

  • Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, N
    ARCHIVER
    Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA

    This data center does not have any addresses listed.

Data Contacts

Toggle Data Contacts
  • Bryan
    Technical Contact
    Bryan Stiles

    SeaWinds Processing and Analysis Center (SeaPAC)

    This contact does not have any addresses listed.

    This contact does not have any contact mechanisms listed.

  • David
    Technical Contact
    David Moroni

    Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, N

    This contact does not have any addresses listed.

    This contact does not have any contact mechanisms listed.

Collection Citations Fields:

Toggle Collection Citations Fields