CYGNSS Level 1 Science Data Record Version 3.0
(CYGNSS_L1_V3.0)
8 Publications Cited this Dataset
Citation metrics available for years (2014-2021)
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Publications citing CYGNSS Level 1 Science Data Record Version 3.0
Citation metrics available for years (2014-2021)
| Year | Citation |
|---|---|
| 2021 | CYGNSS Level 1 Science Data Record Version 3.0, NASA Phys. Oceanogr. DAAC, CYGNSS, 2020. [Online]. Available: https://podaac. jpl.nasa.gov/dataset/CYGNSS_L1_V3.0 Sea Surface Rainfall Detection and Intensity Retrieval Based on GNSS-Reflectometry Data from the CYGNSS Mission, Journal,10.1109/TGRS.2021.3127943 |
| 2021 | A Schematic of Track-wisely Calibrating CyGNSS Data, Journal,10.1109/PIERS53385.2021.9694859 |
| 2021 | An Assessment of CyGNSS v3. 0 Level 1 Observables over the Ocean, Journal,10.3390/rs13173500 |
| 2021 | Improving CyGNSS-Based Land Remote Sensing: Track-Wise Data Calibration Schemes, Journal,10.3390/rs13142844 |
| 2021 | CYGNSS, “CYGNSS Level 1 Science Data Record Version 3.0,” 2020, Available at po- daac.jpl.nasa.gov/dataset/CYGNSS L1 V3.0. Incorporating DDM Sample Spatial Footprint into Effective Scattering Area Estimation for Remote Sensing of Ocean Surface Winds with Cygnss, Conference Paper,10.1109/GNSSR53802.2021.9617695 |
| 2021 | Using CYGNSS Data to Map Flood Inundation during the 2021 Extreme Precipitation in Henan Province, China, Journal,10.3390/rs13245181 |
| 2021 | CYGNSS Soil Moisture Estimations Based on Quality Control, Journal,10.1109/LGRS.2021.3119850 |
| 2021 | Daily Flood Monitoring Based on Spaceborne GNSS-R Data: A Case Study on Henan, China, Journal,10.3390/rs13224561 |
| Version | 3.0 |
| Processing Level | 1 |
| Start/Stop Date | 2018-Aug-01 to 2022-Aug-07 |
| Short Name | CYGNSS_L1_V3.0 |
| Description | This Level 1 (L1) dataset contains the Version 3.0 geo-located Delay Doppler Maps (DDMs) calibrated into Power Received (Watts) and Bistatic Radar Cross Section (BRCS) expressed in units of m2 from the Delay Doppler Mapping Instrument aboard the CYGNSS satellite constellation. This version supersedes Version 2.1; https://doi.org/10.5067/CYGNS-L1X21. Other useful scientific and engineering measurement parameters include the DDM of Normalized Bistatic Radar Cross Section (NBRCS), the Delay Doppler Map Average (DDMA) of the NBRCS near the specular reflection point, and the Leading Edge Slope (LES) of the integrated delay waveform. The L1 dataset contains a number of other engineering and science measurement parameters, including sets of quality flags/indicators, error estimates, and bias estimates as well as a variety of orbital, spacecraft/sensor health, timekeeping, and geolocation parameters. At most, 8 netCDF data files (each file corresponding to a unique spacecraft in the CYGNSS constellation) are provided each day; under nominal conditions, there are typically 6-8 spacecraft retrieving data each day, but this can be maximized to 8 spacecraft under special circumstances in which higher than normal retrieval frequency is needed (i.e., during tropical storms and or hurricanes). Latency is approximately 6 days (or better) from the last recorded measurement time. Here is a summary of improvements the calibration and processing changes to the Version 3.0 data: 1) the transmitted GPS signal strength in the direction of the DDM scattering surface is determined in real time from measurements of the direct signal from the GPS satellite to the CYGNSS navigation receiver, allowing for the BRCS calibration to be corrected for variations in GPS transmit power; 2) the NBRCS has been validated using comparisons with a large population of modeled values derived from coincident ocean surface roughness spectra produced by the NOAA WAVEWATCH-3 oceanographic wave model; 3) L1 calibration parameters have been adjusted to produce a best fit to the model population. |
| DOI | 10.5067/CYGNS-L1X30 |
| Measurement | SPECTRAL/ENGINEERING > RADAR > RADAR CROSS-SECTION SPECTRAL/ENGINEERING > RADAR > RADAR REFLECTIVITY |
| 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-Oct-28 Resource: https://cygnss.engin.umich.edu/ |
| Format | netCDF-4 |
| Keyword(s) | cygnss, ddm, ddmi, ddma, doppler, delay doppler, delay, specular point, waveform, les, leading edge slope, bistatic, bi-static, radar, brcs, sigma0, sigma-0, sigma naught, sigma-naught, nbrcs, wind, winds, wind speed, version 3.0, v3.0, v3 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Spatial Resolution: 25000 Meters x 25000 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: 2018-Aug-01 to 2022-Aug-07 Granule Time Span: 2018-Aug-01 to 2022-Aug-06Swath 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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| podaac-ops-cumulus-protected/CYGNSS_L1_V3.0/ | |
| podaac-ops-cumulus-public/CYGNSS_L1_V3.0/ | |
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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 Science Data Record Version 3.0. Ver. 3.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/CYGNS-L1X30
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Ruf, C., S. Asharaf, R. Balasubramaniam, S. Gleason, T. Lang, D. McKague, D. Twigg, and D. Waliser. 2019. In-Orbit Performance of the Constellation of CYGNSS Hurricane Satellites, Bulletin of the American Meteorological Society, 100, 10. https://doi.org/10.1175/BAMS-D-18-0337.1 Wang, T., Ruf, C. S., Gleason, S., O’Brien, A. J., McKague, D. S., Block, B. P., Russel, A. . 2021. Dynamic Calibration of GPS Effective Isotropic Radiated Power for GNSS-Reflectometry Earth Remote Sensing, IEEE Trans. Geosci. Remote Sens. https://doi.org//10.1109/TGRS.2021.3070238 |
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| Version | Dataset | Version Date | Status | |
|---|---|---|---|---|
| 2.1 | CYGNSS Level 1 Science Data Record Version 2.1 | 2018-05-14 | ACTIVE | 2018-05-14T22:41:39.835Z |
| 3.0 | CYGNSS Level 1 Science Data Record Version 3.0 | 2020-09-22 | ACTIVE | 2020-09-22T17:25:37.880Z |
| 2.0 | CYGNSS Level 1 Science Data Record Version 2.0 | 2017-10-27 | RETIRED | 1509074435972 |
| 1.1 | CYGNSS Level 1 Science Data Record Version 1.1 | 2017-06-09 | RETIRED | 1496966737388 |
| 1.0 | CYGNSS Level 1 Science Data Record Version 1.0 | 2016-03-17 | RETIRED | 1458253007782 |