CYGNSS Level 3 Climate Data Record Version 1.2

Description

This dataset contains the Version 1.2 CYGNSS Level 3 Climate Data Record which provides the average wind speed and mean square slope (MSS) on a 0.2x0.2 degree latitude by longitude equirectangular grid obtained from the Delay Doppler Mapping Instrument aboard the CYGNSS satellite constellation. The Level 2 Delay Doppler Map (DDM) data are used in the direct processing of the average wind speed and MSS data that are binned on the Level 3 grid. A subset of DDM data used in the direct processing of the average wind speed and MSS is co-located inside of the Level 2 data files. A single netCDF-4 data file is produced for each day of operation with an approximate 5 days latency. The reported sample locations are determined by the specular points corresponding to the Delay Doppler Maps (DDMs). The Version 1.2 CDR is a collection of reanalysis products derived from the SDR v3.1 Level 1 data (https://doi.org/10.5067/CYGNS-L1X31 ). Calibration accuracy and long term stability are improved relative to SDR v3.1 (https://doi.org/10.5067/CYGNS-L3X31 ) using the same trackwise correction algorithm as was used by CDR v1.1 (https://doi.org/10.5067/CYGNS-L3C11 ), which was derived from SDR v3.0 Level 1 data (https://doi.org/10.5067/CYGNS-L1X30 ). Details of the algorithm are provided in the Trackwise Corrected CDR Algorithm Theoretical Basis Document. CDR Level 2 and 3 products (ocean surface wind speed, mean square slope, and latent and sensible heat flux) are generated from the CDR L1 data using the v3.1 SDR data processing algorithms. These products also exhibit improved calibration accuracy and stability over SDR v3.1. Trackwise correction is applied to the two primary CYGNSS L1 science data products, the normalized bistatic radar cross section (NBRCS) and the leading edge slope of the Doppler-integrated delay waveform (LES). The correction compensates for small errors in the Level 1 calibration, due e.g. to uncertainties in the GPS transmitting antenna gain patterns and the CYGNSS receiving antenna gain patterns. It should be noted that the trackwise correction algorithm cannot be successfully applied to all SDR v3.1 L1 data so there is also some loss of samples that were present in SDR v3.1.

Resources

Name Format Description Link
5 https://cygnss.engin.umich.edu%2Fwp-content%2Fuploads%2Fsites%2F534%2F2021%2F06%2FCYGNSS_Handbook_April2016.pdf
5 https://doi.org%2F10.1175%2FBAMS-D-18-0337.1
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL3%2Fdocs%2F148-0319_ATBD_L3_Gridded_Wind_Speed_Rev1_Aug2018_release.pdf
5 https://cygnss.engin.umich.edu%2F
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL2%2Fdocs%2F148-0389_ATBD_Trackwise_Corrected_CDR_R1_released.pdf
5 https://docs.google.com%2Fspreadsheets%2Fd%2F1AFAZanVGDApLSnJQAAdPfOKoJQs0jnB8ZvIuD1Z5mAc%2Fedit%23gid%3D0
5 https://doi.org%2F10.1175%2FBAMS-D-14-00218.1
5 https://cmr.earthdata.nasa.gov%2Fvirtual-directory%2Fcollections%2FC2274918604-POCLOUD
5 https://search.earthdata.nasa.gov%2Fsearch%2Fgranules%3Fp%3DC2274918604-POCLOUD
5 https://www.youtube.com%2Fuser%2FNASAJPLPODAAC
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_1.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_2.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_3.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_4.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_5.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_6.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_8.txt
5 https://podaac.jpl.nasa.gov%2FCYGNSS
5 https://doi.org%2F10.3998%2Fmpub.12741920
5 https://podaac.jpl.nasa.gov%2FPodaac%2Fthumbnails%2FCYGNSS_L3_CDR_V1.2.jpg
5 https://podaac.jpl.nasa.gov%2FCitingPODAAC
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL3%2Fdocs%2F148-0390-3_Level_3_CDR_netCDF_Data_Dictionary.xlsx
5 https://github.com%2Fpodaac%2Fdata-readers
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fcygnss%2Fopen%2FL1%2Fdocs%2Fatt_tables%2FAttitude_Table_FM_7.txt
5 https://podaac.jpl.nasa.gov/CitingPODAAC
5 https://github.com/podaac/data-readers
53 148-0390-3_Level_3_CDR_netCDF_Data_Dictionary.xlsx https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/docs/148-0390-3_Level_3_CDR_netCDF_Data_Dictionary.xlsx
33 CYGNSS_Handbook_April2016.pdf https://cygnss.engin.umich.edu/wp-content/uploads/sites/534/2021/06/CYGNSS_Handbook_April2016.pdf
5 https://doi.org/10.1175/BAMS-D-18-0337.1
5 https://cygnss.engin.umich.edu/
33 148-0389_ATBD_Trackwise_Corrected_CDR_R1_released.pdf https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L2/docs/148-0389_ATBD_Trackwise_Corrected_CDR_R1_released.pdf
5 https://docs.google.com/spreadsheets/d/1AFAZanVGDApLSnJQAAdPfOKoJQs0jnB8ZvIuD1Z5mAc/edit#gid=0
5 https://doi.org/10.1175/BAMS-D-14-00218.1
5 https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2274918604-POCLOUD
47 Attitude_Table_FM_1.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_1.txt
47 Attitude_Table_FM_2.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_2.txt
47 Attitude_Table_FM_3.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_3.txt
47 Attitude_Table_FM_4.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_4.txt
47 Attitude_Table_FM_5.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_5.txt
47 Attitude_Table_FM_6.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_6.txt
47 Attitude_Table_FM_7.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_7.txt
47 Attitude_Table_FM_8.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_8.txt
5 https://podaac.jpl.nasa.gov/CYGNSS
5 https://doi.org/10.3998/mpub.12741920
22 CYGNSS_L3_CDR_V1.2.jpg https://podaac.jpl.nasa.gov/Podaac/thumbnails/CYGNSS_L3_CDR_V1.2.jpg
5 https://search.earthdata.nasa.gov/search/granules?p=C2274918604-POCLOUD
5 https://www.youtube.com/user/NASAJPLPODAAC
33 148-0319_ATBD_L3_Gridded_Wind_Speed_Rev1_Aug2018_release.pdf https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/docs/148-0319_ATBD_L3_Gridded_Wind_Speed_Rev1_Aug2018_release.pdf
5 148-0390-3_Level_3_CDR_netCDF_Data_Dictionary.xlsx https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/docs/148-0390-3_Level_3_CDR_netCDF_Data_Dictionary.xlsx
33 148-0319_ATBD_L3_Gridded_Wind_Speed_Rev1_Aug2018_release.pdf https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/docs/148-0319_ATBD_L3_Gridded_Wind_Speed_Rev1_Aug2018_release.pdf
5 https://cygnss.engin.umich.edu/
33 148-0389_ATBD_Trackwise_Corrected_CDR_R1_released.pdf https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L2/docs/148-0389_ATBD_Trackwise_Corrected_CDR_R1_released.pdf
5 https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2274918604-POCLOUD
5 https://search.earthdata.nasa.gov/search/granules?p=C2274918604-POCLOUD
5 https://www.youtube.com/user/NASAJPLPODAAC
5 https://podaac.jpl.nasa.gov/CYGNSS
22 CYGNSS_L3_CDR_V1.2.jpg https://podaac.jpl.nasa.gov/Podaac/thumbnails/CYGNSS_L3_CDR_V1.2.jpg
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C2274918604-POCLOUD.iso19115

Tags

  • earth-science-ocean-winds-oceans-surface-winds-ocean-surface-wind-speed
  • earth-science-ocean-winds-oceans-surface-winds

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