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CYGNSS Level 1 Science Data Record Version 3.0. DOI:

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CYGNSS Level 1 Science Data Record Version 2.0
11 Publications Cited this Dataset
Citation metrics available for years (2015-2019)
Short NameCYGNSS_L1_V2.0
DescriptionThis Level 1 (L1) dataset contains the Version 2.0 geo-located Delay Doppler Maps (DDMs) calibrated into Power Received (Watts) and Bistatic Radar Cross Section (BRCS) expressed in units of m^2 from the Delay Doppler Mapping Instrument aboard the CYGNSS satellite constellation. This version supersedes Version 1.1. 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. The Version 2.0 release represents the first science-quality release that has moved beyond the previous "Provisional" releases (i.e., Version 1.0 and 1.1). Here is a summary of improvements that reflect the quality of the Version 2.0 data release: 1) more accurate estimates of the transmitter power of each GPS satellite; 2) more accurate estimates of the transmitter antenna radiation patterns of each GPS satellite; 3) more accurate determination of the delay and Doppler coordinates of the specular point in each DDM; 4) Correction for variations in the GPS antenna gain pattern across the DDM (v1.1 assumed the gain at the specular point for all parts of the DDM); 5) Correction for variations in the GPS signal propagation range with altitude of the CYGNSS satellites (v1.1 assumed a constant range consistent with the average orbit altitude); 6) more accurate determination of the receiver antenna radiation patterns on the port and starboard side of each CYGNSS satellite; 7) better quality control flagging for increased uncertainty in CYGNSS satellite attitude knowledge during start tracker sun outages.
Dataset TypeRETIRED
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Citation CYGNSS. 2017. CYGNSS Level 1 Science Data Record Version 2.0. Ver. 2.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at

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For more information see Data Citations and Acknowledgments.

Journal Reference Ruf, C., R. Atlas, P. Chang, M. Clarizia, J. Garrison, S. Gleason, S. Katzberg, Z. Jelenak, J. Johnson, S. Majumdar, A. OaEUR(TM)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.
VersionDatasetVersion DateStatus
3.0CYGNSS Level 1 Science Data Record Version 3.02020-09-22ACTIVE1600795537880
2.1CYGNSS Level 1 Science Data Record Version 2.12018-05-14ACTIVE1526337699835
2.0CYGNSS Level 1 Science Data Record Version 2.02017-10-27RETIRED1509074435972
1.1CYGNSS Level 1 Science Data Record Version 1.12017-06-09RETIRED1496966737388
1.0CYGNSS Level 1 Science Data Record Version 1.02016-03-17RETIRED1458253007782