CYGNSS Level 1 Full Delay Doppler Map Data Record
This Level 1 (L1) dataset contains the 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.
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| Spatial Extent: | Bounding Rectangle: N: 40 S: 40 E: 180 W: -180 |
Data Format(s): | Distribution: NETCDF |
| Temporal Extent: | Platform(s): | CYGNSS | |
| Data Center(s): | NASA/JPL/PODAAC | Instrument(s): | DDMI |
| Version: | 1.0 | ||
- Title: CYGNSS Level 1 Full Delay Doppler Map Data Record
- Version: 1.0
- Creator: CYGNSS
- Publisher: PO.DAAC
- Release Date: 2020-08-21T00:00:00.000Z
- Other Citation Details: CYGNSS, PO.DAAC, 2020-08-21, CYGNSS Level 1 Full Delay Doppler Map Data Record, http://clasp-research.engin.umich.edu/missions/cygnss/
- DATA CITATION POLICY: https://podaac.jpl.nasa.gov/CitingPODAAC, Data Use and Citation Policy
- USER'S GUIDE: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/L1/docs/148-0373_Full_DDM_netCDF_Data_Dictionary.xlsx, Level 1 Full DDM netCDF Data Dictionary
- GENERAL DOCUMENTATION: http://clasp-research.engin.umich.edu/missions/cygnss/, CYGNSS Mission Page at University of Michigan
- USER'S GUIDE: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/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
- USER'S GUIDE: https://docs.google.com/spreadsheets/d/1OZ5OlQU5mnIL0_cmZhdub8dz6x4JTOTGAWqndkBptO4/edit?usp=sharing, CYGNSS Targeting Information for Full DDM Data
- GENERAL DOCUMENTATION: https://clasp-research.engin.umich.edu/missions/cygnss/reference/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.
- GENERAL DOCUMENTATION: https://clasp-research.engin.umich.edu/missions/cygnss/reference/cygnss-mission/CYGNSS_Handbook_April2016.pdf, Deriving Surface Winds from Tropical Cyclones
- ANOMALIES: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/L1/docs/att_tables/, Updated Monthly
- GENERAL DOCUMENTATION: https://clasp-research.engin.umich.edu/missions/cygnss/reference/148-0137_ATBD_L1B_DDMCalibration_Rev2_Aug2018_release.pdf, Level 1B DDM Calibration Algorithm Theoretical Basis Document, S. Gleason, CYGNSS Project Document 148-0137, Rev 2, 20 Aug. 2018.
Collection Information
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DOI
10.5067/CYGNS-L1FDD
https://dx.doi.org/
- Search for granules from this collection
Data Identification
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Processing Level
1
- Quality
-
Collection Progress
Active
Data Dates
| Creation | |
| Last Revision |
Related URLs
Other Descriptive Keywords
Ancillary Keywords
- cygnss
- raw
- raw if
- if
- intermediate frequency
- doppler
- delay doppler
- delay
- specular point
- bistatic
- bi-static
- radar
Additional Attributes
- Name: earliest_granule_start_time DATETIME Description: Earliest Granule Start Time for dataset.
- Name: latest_granule_end_time DATETIME Description: Latest Granule Stop/End Time for dataset.
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| CYGNSS | No campaigns listed. | No dates provided. |
Temporal Information
Temporal Keywords
- Hourly - < Daily
Spatial Information
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN | CARTESIAN |
Resolution and Coordinate System
Geodetic Model:
| Datum Name | Ellipsoid Name | Semi Major Axis | Flattening Ratio Denominator |
|---|---|---|---|
| World Geodetic System 1984 | WGS 84 | 6378137 | 298.2572236 |
| Coverage Type | Swath Width | Period | Inclination Angle | Number of Orbits | Start Circular Latitude | Granule Representation |
|---|---|---|---|---|---|---|
| ORBITAL | 1000.0 | 94.0 | 35.0 | 1 | CARTESIAN |
Spatial Information
Location Keywords
- GEOGRAPHIC REGION
Data Centers
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UMICH/ENG/CSSE
PROCESSORThis data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
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NASA/JPL/PODAAC
ARCHIVERCyclone Global Navigation Satellite System
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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Tim Butler
Data Center ContactTim Butler
NASA/JPL/PODAACThis contact does not have any addresses listed.
734-936-3105
Archive And Distribution Information
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Format: NETCDF
Format Type: Native