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CYGNSS Level 2 Ocean Surface Heat Flux Climate Data Record Version 1.2

Metadata Updated: December 6, 2023

This dataset contains the Version 1.2 CYGNSS Level 2 Ocean Surface Heat Flux Climate Data Record, which provides time-tagged and geolocated ocean surface heat flux parameters with 25x25 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 2.0 represents the second release of this product, which now uses CYGNSS Level 2 (L2) Science Data Record (SDR) Version 3.1 surface wind speeds and ECMWF Reanalysis, Version 5 (ERA5). Version 1.0 used CYGNSS L2 SDR Version 2.1 surface wind speeds and NASA Modern-Era Retrospective Analysis for Research and Applications Version 2 (MERRA-2). The Coupled Ocean-Atmosphere Response Experiment (COARE) algorithm is what is used in this dataset to estimate the latent and sensible heat fluxes and their respective transfer coefficients. While COARE's initial intentions were for low to moderate wind speeds, the version used for this product, COARE 3.5, has been verified with direct in situ flux measurements for wind speeds up to 25 m/s. As CYGNSS does not provide air/sea temperature, humidity, surface pressure or density, the producer of this dataset obtains these values from this dataset obtains these values from ERA5. The Cyclone Global Navigation Satellite System (CYGNSS), launched on 15 December 2016, is a NASA Earth System Science Pathfinder Mission that was launched with the purpose to collect the first frequent space-based measurements of surface wind speeds in the inner core of tropical cyclones. Made up of a constellation of eight micro-satellites, the CYGNSS observatories provide nearly gap-free Earth coverage with a mean (i.e., average) revisit time of seven hours and a median revisit time of three hours. As a result of the CYGNSS constellation coverage, this data is made available from 1 August 2018 to present with an approximate 1 week latency in the netCDF-4 formatted data files, where each file contains data within a 24-hour UTC period from a combination of up to 8 unique CYGNSS spacecraft. More information on CYGNSS can be found on the CYGNSS mission page.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources



Metadata Created Date May 30, 2023
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date May 30, 2023
Metadata Updated Date December 6, 2023
Identifier C2646932894-POCLOUD
Data First Published 2022-04-16
Language en-US
Data Last Modified 2022-04-29
Category CYGNSS, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation CYGNSS. 2023-04-30. CYGNSS Level 2 Ocean Surface Heat Flux Cloud Data Record. Version 1.2. CYGNSS Level 2 Ocean Surface Heat Flux Climate Data Record Version 1.2. PO.DAAC. Archived by National Aeronautics and Space Administration, U.S. Government, PO.DAAC. CYGNSS, PO.DAAC, 2019-08-11, CYGNSS Level 2 Ocean Surface Heat Flux Cloud Data Record Version 1.0,
Creator CYGNSS
Graphic Preview Description Thumbnail
Graphic Preview File
Harvest Object Id 0198a085-b697-4be4-85a9-a97fd36b15d9
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -38.0 180.0 38.0
Program Code 026:001
Related Documents
Release Place PO.DAAC
Series Name CYGNSS Level 2 Ocean Surface Heat Flux Cloud Data Record
Source Datajson Identifier True
Source Hash 0ce2dfc8e4152497bb204fd9d12adba7492417846061da950f0c77462a3ae258
Source Schema Version 1.1
Temporal 2018-08-01T00:00:00Z/2023-05-08T00:00:00Z

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