Collection supporting "Multiplatform calibration and validation of CFOSat ocean surface waves"

Brief description

The datasets in this collection support the manuscript "Multiplatform calibration and validation of CFOSat ocean surface waves" which presents a comprehensive comparison of satellite-derived wind and wave data products from the Surface Waves Investigation and Monitoring (SWIM) instrument onboard the China France Oceanography Satellite (CFOSat) against multiple in-situ wave buoy datasets. Specifically, the NetCDFs contain the matchups or collocated observations (in time and space) between SWIM and wave buoys.
Lineage: Original datasets used in the matchups
1.\tSatellite (SWIM) data
Level-2 data from the CFOSat SWIM sensor processing version 6.0 were downloaded for the period from April 2019 to December 2023 from AVISO (https://aviso.altimetry.fr). The use of CFOSat wind or wave products is subject to AVISO Standard license (http://www.aviso.altimetry.fr/fileadmin/documents/data/License_Aviso.pdf), which allows free public access to the data for any purpose, including scientific applications, operational, and commercial.

2.\tWave buoy observations were accessed from the following sources:
a.\tNational Data Buoy Centre (NDBC) wave buoy archive
The NDBC wave buoy data archive was accessed from the U.S. Army Corps of Engineers (USACE) Coastal and Hydraulic Laboratory (CHL) Data server (https://chldata.erdc.dren.mil/). This archive contains a consistent collection of Northern Hemisphere focused meteorological and wave buoy measurements fully described in Hall C, Jensen RE (2022) USACE Coastal and Hydraulics Laboratory Quality Controlled, Consistent Measurement Archive. 9:248 (https://doi.org/10.1038/s41597-022-01344-z). The NDBC data archive are open with no restrictions on their use.

b.\tAustralian Ocean Data Network (AODN) Portal
The Southern Ocean Flux Station (SOFS) moored wave buoy data from four deployments (SOFS-8 to SOFS-11) from March 2019 to May 2023 were downloaded from the https://portal.aodn.org.au. SOFS wave buoy is a large surface buoy moored in the Subantarctic zone (near 140°E and 47°S) in ~4,500 m water depth southwest of Tasmania providing an important source of wave data in this remote oceanic region in the Southern Ocean.


Matchup approach
Collocation data for each satellite-buoy pair contain matched observations in space and time. Collocations are obtained for each satellite observation that is within 50 km and 30 minutes of wave buoy observation.

Matchups were carried between four SWIM satellite products (6° beam, 8° beam, 10° beam, and combined beam) and the SOFS wave buoy observations OR the NDBC wave buoys observation.

Directory structure
•\tList of NetCDFs containing satellite-buoy matchups between SWIM and NDBC observations
/matchups_data/ndbc:
--ds_buoy_ndbc_efthsmoothed.nc
--ds_swim_ndbc_efth_beam06.nc
--ds_swim_ndbc_efth_beam08.nc
--ds_swim_ndbc_efth_beam10.nc
--ds_swim_ndbc_efth_combined.nc

•\tList of NetCDFs containing satellite-buoy matchups between SWIM and SOFS observations
/matchups_data/sofs:
--ds_buoys_sofs_8-11_lp.nc
--ds_buoys_sofs_8-11_swh.nc
--ds_buoys_sofs_8-11_tm02.nc
--ds_swim_sofs_8_to_11_b06_1Dspec.nc
--ds_swim_sofs_8_to_11_b08_1Dspec.nc
--ds_swim_sofs_8_to_11_b10_1Dspec.nc
--ds_swim_sofs_8_to_11_cmb_1Dspec.nc

•\tList of NetCDFs containing satellite-buoy matchups between SWIM and SOFS-11 2D spectra observations
/matchups_data/sofs:
--sofs11-swim_2Dspectra_collocation.nc
--swim-sofs11_2Dspectra_collocation.nc

•\tList of NetCDFs containing matchups between a mean wave period (MWP) algorithm and buoy (NDBC or SOFS) observations
/matchups_data/jiang-mwp:
--ds_jiang-ndbc_Tm02.nc
--ds_ndbc-jiang_Tm02.nc
--ds_jiang-sofs_Tm02.nc
--ds_sofs-jiang_Tm02.nc