CYGNSS Level 1 Raw Intermediate Frequency Data Record

(CYGNSS_L1_RAW_IF)

Citation metrics available for years (2014-2021)

Publications citing CYGNSS Level 1 Raw Intermediate Frequency Data Record

Citation metrics available for years (2014-2021)

Year	Citation
2021	CYGNSS. (2017). CYGNSS Level 1 Science Data Record Version 2.1. [Online]. Available: https://podaac.jpl.nasa.gov/dataset/ CYGNSS_L1_V2.1 Phase Coherence of GPS Signal Land Reflections and its Dependence on Surface Characteristics, Journal,10.1109/LGRS.2021.3094407
2021	Towards wind vector and wave height retrievals over inland waters using CYGNSS, Journal,10.1029/2020EA001506

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Data Access
Documentation
Citation
Version History

Version	1.0
Processing Level	1
Start/Stop Date	2017-Feb-19 to Present
Short Name	CYGNSS_L1_RAW_IF
Description	This Level 1 (L1) dataset contains the Raw Intermediate Frequency (IF) 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), digitizes the incoming radio frequency (RF) streams from three input antenna channels (2 nadir oriented science antennas and one zenith oriented navigation antenna). The Raw IF data included in this data record are the raw sensor counts, retrieved prior to any digital signal processing, thus providing the highest possible resolution in delay and doppler space allowing for the construction of high resolution Delay Doppler Map (DDM) data. Raw IF data records are 30-90 sec in duration, with 60 sec being typical, and are initiated by ground commands to coincide with an overpass by one of the spacecraft of a target area of interest.
DOI	10.5067/CYGNS-L1RIF
Measurement	SPECTRAL/ENGINEERING > RADAR > SENSOR COUNTS
Swath Width	25 km
Platform/Sensor	CYGNSS Platform Name: Cyclone Global Navigation Satellite System (CYGNSS) Orbit Period: 94.0 minutes Inclination Angle: 35.0 degrees / DDMI SENSOR Name: Delay Doppler Mapping Instrument (DDMI) Swath Width: 25.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator.
Project	Cyclone Global Navigation Satellite System (CYGNSS)
Data Provider	Publisher: PO.DAAC Creator: CYGNSS Release Place: PO.DAAC Release Date: 2020-Aug-21 Resource: https://cygnss.engin.umich.edu/
Format	RAW
Keyword(s)	cygnss, raw, raw if, if, intermediate frequency, doppler, delay doppler, delay, specular point, bistatic, bi-static, radar

Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov

Resolution Spatial Resolution: 1000 Meters x 1000 Meters Temporal Resolution: Hourly - < Daily Coverage Region: GLOBAL North Bounding Coordinate: 40 degrees South Bounding Coordinate: -40 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2017-Feb-19 to Present Granule Time Span: 2017-Feb-19 to 2024-Apr-02 Swath Width: 25 km Projection Projection Type: Satellite native along-track Projection Detail: Geolocation information included for each pixel Ellipsoid: WGS 84

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Browse Granule Listing
https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2036882037-POCLOUD
Search Granules
https://search.earthdata.nasa.gov/search/granules?p=C2036882037-POCLOUD
DIRECT S3-ACCESS
Available for access in-region with AWS Cloud
Region
us-west-2
Bucket/Object Prefix: Protected buckets contain the data files for a given collection. Protected simply means users must log in to Earthdata Login before gaining access to contents within that S3 Bucket. Please use the S3Credential endpoint to gain an Earthdata login token for use in S3 Access. Public buckets, in contrast, house metadata such as checksums, imagery, and metadata files and the like. A user can access public buckets and these types of files without logging in to Earthdata Login. Most of the time, you'll want to access the protected bucket Information
podaac-ops-cumulus-protected/CYGNSS_L1_RAW_IF/
podaac-ops-cumulus-public/CYGNSS_L1_RAW_IF/
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DATA RECIPE
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/sw/post_processing_script/Plot_rawIF_Tracks_land.m Matlab code to plot Raw IF Data over the land.
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/sw/post_processing_script/Plot_rawIF_Tracks.m Matlab code to plot Raw IF Data over the globe.
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/sw/post_processing_script/process_rawIF_metadata.m Matlab code to read Raw IF Metadata files.
https://github.com/podaac/CYGNSS-Raw-IF-Code Complete set of C and Matlab processing code
GENERAL DOCUMENTATION
http://cygnss.engin.umich.edu/wp-content/uploads/sites/534/2021/07/148-0136_ATBD_L1A_DDMCalibration_Rev2_Aug2018_release.pdf Level 1A DDM Calibration Algorithm Theoretical Basis Document, S. Gleason, CYGNSS Project Document 148-0136, Rev 2, 20 Aug. 2018.
https://cygnss.engin.umich.edu/ CYGNSS Mission Page at University of Michigan
https://cygnss.engin.umich.edu/wp-content/uploads/sites/534/2021/06/CYGNSS_Handbook_April2016.pdf Deriving Surface Winds from Tropical Cyclones
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_1.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_2.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_3.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_4.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_5.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_6.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_7.txt Updated Monthly
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/att_tables/Attitude_Table_FM_8.txt Updated Monthly
USER'S GUIDE
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/148-0397-1_ATBD_L1_RawIF_FullDDM.pdf Algorithm Theoretical Basis Document (ATBD) for the CYGNSS Level 1 Full DDM and Raw IF Datasets, S. Gleason, S. Musko, CYGNSS Project Document 148-0397-01, Rev 1, 22 June 2020
https://docs.google.com/spreadsheets/d/1kS6XC5JPzILl8w0ZnOn5JyFvkD9hcDxFe18rjgd6ylo/edit?usp=sharing CYGNSS Targeting Information for Raw IF Data
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/sw/Processing_CYGNSS_RawIF_Collection_Example.pdf 60 second FM8 Raw IF data collection over Hurricane Harvey Example
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L1/docs/148-0354-2_CYGNSS_RawIF_Data_File_Format.docx CYGNSS Raw IF Dataset File Formatting and Specifications Document
https://doi.org/10.3998/mpub.12741920 CYGNSS Handbook
PUBLICATIONS
https://journals.ametsoc.org/doi/10.1175/BAMS-D-14-00218.1 Ruf, C., R. Atlas, P. Chang, M. Clarizia, J. Garrison, S. Gleason, S. Katzberg, Z. Jelenak, J. Johnson, S. Majumdar, A. O'Brien, D. Posselt, A. Ridley, R. Rose, V. Zavorotny (2015). New Ocean Winds Satellite Mission to Probe Hurricanes and Tropical Convection. Bull. Amer. Meteor. Soc., doi:10.1175/BAMS-D-14-00218.1.
https://doi.org/10.1109/TGRS.2015.2502245 Gleason, S., C. Ruf, M. P. Clarizia, A. O'Brien, 'Calibration and Unwrapping of the Normalized Scattering Cross Section for the Cyclone Global Navigation Satellite System (CYGNSS)', IEEE Trans. Geosci. Remote Sens., doi:10.1109/TGRS.2015.2502245, 2016.
ANOMALIES
https://podaac.jpl.nasa.gov/forum/viewtopic.php?f=16&t=1261 Forum Post Capturing Changes to CYGNSS Sampling Rate
DATA CITATION POLICY
https://podaac.jpl.nasa.gov/CitingPODAAC Data Use and Citation Policy

Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.

Citation

CYGNSS. 2020. CYGNSS Level 1 Raw Intermediate Frequency Data Record. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/CYGNS-L1RIF

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For more information see Data Citations and Acknowledgments.

Journal Reference

Gleason, S., Ruf, C. S., O'Brien, A. J., McKague, D. S. . 2019. The CYGNSS Level 1 Calibration Algorithm and Error Analysis Based On On-Orbit Measurements., IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 12, 1. 10.1109/JSTARS.2018.2832981

Version	Dataset	Version Date	Status
1.1	CYGNSS Level 1 Calibrated Raw IF Version 1.1	2024-04-10	ACTIVE	2024-04-10T19:57:00.000Z
1.0	CYGNSS Level 1 Raw Intermediate Frequency Data Record	2021-06-23	ACTIVE	2021-06-23T17:18:00.000Z
1.0	UC Berkeley CYGNSS Level 3 RWAWC Watermask Version 1.0	2024-04-11	ACTIVE	2024-04-11T01:42:00.000Z

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Status:

ACTIVE

Short Name:

CYGNSS_L1_RAW_IF

Collection Concept ID:

C2036882037-POCLOUD

Spatial Coverage:

N: 40°

S: -40°

E: 180°

W: -180°

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CYGNSS Level 1 Raw Intermediate Frequency Data Record

CYGNSS Level 1 Raw Intermediate Frequency Data Record

Publications citing CYGNSS Level 1 Raw Intermediate Frequency Data Record

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