CYGNSS Level 1 Raw Intermediate Frequency Data Record
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.
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| Spatial Extent: | Bounding Rectangle: N: 40 S: -40 E: 180 W: -180 |
Data Format(s): | Distribution: RAW |
| Temporal Extent: | Platform(s): | CYGNSS | |
| Data Center(s): | NASA/JPL/PODAAC | Instrument(s): | DDMI |
| Version: | 1.0 | ||
- Title: CYGNSS Level 1 Raw Intermediate Frequency 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 Raw Intermediate Frequency Data Record, https://cygnss.engin.umich.edu/
- Linkage: https://cygnss.engin.umich.edu/
- DATA CITATION POLICY: https://podaac.jpl.nasa.gov/CitingPODAAC, Data Use and Citation Policy
10.5067/CYGNS-L1RIF
https://dx.doi.org/
- ANOMALIES: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/L1/docs/att_tables/, Updated Monthly
- 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/1kS6XC5JPzILl8w0ZnOn5JyFvkD9hcDxFe18rjgd6ylo/edit?usp=sharing, CYGNSS Targeting Information for Raw IF Data
- ANOMALIES: https://podaac.jpl.nasa.gov/forum/viewtopic.php?f=16&t=1261, Forum Post Capturing Changes to CYGNSS Sampling Rate
- GENERAL DOCUMENTATION: https://cygnss.engin.umich.edu/, CYGNSS Mission Page at University of Michigan
- USER'S GUIDE: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/L1/sw/Processing_CYGNSS_RawIF_Collection_Example.pdf, 60 second FM8 Raw IF data collection over Hurricane Harvey Example
- GENERAL DOCUMENTATION: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/L1/docs/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://cygnss.engin.umich.edu/wp-content/uploads/sites/534/2021/06/CYGNSS_Handbook_April2016.pdf, Deriving Surface Winds from Tropical Cyclones
- USER'S GUIDE: https://podaac-tools.jpl.nasa.gov/drive/files/allData/cygnss/L1/docs/148-0354-2_CYGNSS_RawIF_Data_File_Format.docx, CYGNSS Raw IF Dataset File Formatting and Specifications Document
Collection Information
Data Identification
-
Processing Level
1
- Quality
-
Collection Progress
Active
-
Title: Publication reference title not provided
Data Dates
| Creation | |
| Last Revision |
Publication References
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.
- Name: data_latency INT Description: Dataset Latency
- Name: Series Name STRING Description: Dataset citation series name
- Name: Persistent ID STRING Description: Dataset Persistent ID
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| CYGNSS | No campaigns listed. | No dates provided. |
Temporal Information
Temporal Keywords
- 7.2 Hour
Spatial Information
Generic Resolutions
Generic Resolution 1
X Dimension1000 Meters
Y Dimension1000 Meters
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN | CARTESIAN |
Resolution and Coordinate System
Projection Type: Satellite native along-track, Projection Detail: Geolocation information included for each pixel
Geodetic Model:
| Datum Name | Ellipsoid Name | Semi Major Axis | Flattening Ratio Denominator |
|---|---|---|---|
| World Geodetic System 1984 | WGS 84 | 6378137 | 298.2572236 |
Horizontal Data Resolution
| Coverage Type | Swath Width | Period | Inclination Angle | Number of Orbits | Start Circular Latitude | Granule Representation |
|---|---|---|---|---|---|---|
| ORBITAL | 1.0 km | 94.0 minutes | 35.0 degrees | 1 | CARTESIAN |
Spatial Information
Location Keywords
- GEOGRAPHIC REGION
- GLOBAL
- Tropics
Data Centers
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NASA/ESSP/UMICH/CYGNSS
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
ARCHIVER, DISTRIBUTORPhysical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
Data Contacts
-
Help Desk
User ServicesHelp Desk
NASA/JPL/PODAACThis contact does not have any addresses listed.
8 AM to 5 PM PT
Physical Oceanography Distributed Active Archive Center Help Page
https://podaac.jpl.nasa.gov/HELP
- Home Page
Archive And Distribution Information
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Format: RAW
Format Type: Native
File Distribution Information
There is no direct distribution information for this collection.