The PO.DAAC is pleased to announce the public release of the CYGNSS Level 2 Ocean Surface Heat Flux Climate Data Record (CDR) Version 1.1. More information regarding the Cyclone Global Navigation Satellite System (CYGNSS) mission and instrumentation is available from PO.DAAC’s mission webpage.
This dataset provides the time-tagged and geolocated ocean surface heat flux parameters with 25 x 25 kilometer footprint resolution from the Delay Doppler Mapping Instrument (DDMI) aboard the CYGNSS satellite constellation. The reported sample locations are determined by the specular points corresponding to the Delay Doppler Maps (DDMs). Version 1.1 represents the second release of the CDR product-line, and features improved ocean surface heat flux estimates as a bi-product of the improved CYGNSS L2 CDR V1.1 wind speed retrievals; these Level 2 input winds are used as input to compute the flux estimates and feature track de-biasing and other calibration and algorithm improvements.
The CYGNSS satellite constellation retrieves winds that cover the global tropical oceans within a latitude band between approximately 40° S and 40° N from 1 August 2018 to 31 March 2021 with a forward production latency of approximately 2 months (or better) from the last recorded measurement time. One netCDF-4 data file is produced each day (each file containing data from a combination of up to 8 unique CYGNSS spacecraft). The data, associated documentation, tools and services are described and discoverable via the PO.DAAC data portal.
Citation: CYGNSS. 2021. CYGNSS Level 2 Ocean Surface Heat Flux Climate Data Record Version 1.1. Ver. 1.1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/CYGNS-C2H11.
Reference: Crespo, J. A., Posselt, D. J., & Asharaf, S. (2019). CYGNSS Surface Heat Flux Product Development. Remote Sens. 2019, 11, 2294. DOI: 10.3390/rs11192294.