Currents, HF Radar, US East Coast and Gulf of Mexico, RTV, Near-Real Time, 2012-present, Hourly, 1km, Lon0360

Surface ocean velocities estimated from HF-Radar are representative
of the upper 0.5 meters of the ocean. The main objective of
near-real time processing is to produce the best product from
available data at the time of processing. Radial velocity
measurements are obtained from individual radar sites through the
U.S. HF-Radar Network. Hourly radial data are processed by unweighted
least squares on a 1km resolution grid of the U.S. East and Gulf
Coast to produce near real-time surface current maps.
_CoordSysBuilder=ucar.nc2.dataset.conv.CF1Convention
cdm_data_type=Grid
Conventions=COARDS, CF-1.6, ACDD-1.3
defaultGraphQuery=&.draw=vectors&.color=0x0000FF
Easternmost_Easting=302.8075
format_version=1.1.00
geospatial_lat_max=46.49442
geospatial_lat_min=21.7
geospatial_lat_resolution=0.00899
geospatial_lat_units=degrees_north
geospatial_lon_max=302.8075
geospatial_lon_min=262.1161
geospatial_lon_resolution=0.009679210275927684
geospatial_lon_units=degrees_east
history=2024-09-30T19:19:47Z hfrnet rtvMergeData: Saving 699 new solutions
2024-09-30T19:49:36Z hfrnet rtvMergeData: Saving 1615 solutions; 916
new or updated, 699 unmodified from previous run(s)
2024-09-30T20:19:34Z hfrnet rtvMergeData: Saving 2838 solutions; 1223
new or updated, 1615 unmodified from previous run(s)
2024-09-30T20:19:36Z hfrnet rtvSaveNetcdf: Removed 968 solutions
exceeding HDOP threshold of 1.25 ;
FMRC Best Dataset
id=202409301800siohfruwlsrtvusegc1km
infoUrl=https://cordc.ucsd.edu/projects/mapping/
institution=Coastal Observing Research and Development Center, Scripps Institution of Oceanography
instrument=Earth Remote Sensing Instruments, Active Remote Sensing,
Profilers/Sounders, Radar Sounders, Doppler RADAR
instrument_vocabulary=Global Change Master Directory (GCMD) Keywords, Version 8.6
keywords_vocabulary=GCMD Science Keywords
location=Proto fmrc:HFRADAR_US_East_and_Gulf_Coast_1km_Resolution_Hourly_RTV
naming_authority=edu.ucsd.cordc
Northernmost_Northing=46.49442
processing_level=Near real-time dataset with automated data acquisition and processing
quality control
program=Integrated Ocean Observing System (IOOS)
references=Terrill, E. et al., 2006. Data Management and Real-time Distribution
in the HF-Radar National Network. Proceedings of the MTS/IEEE Oceans
2006 Conference, Boston MA, September 2006.
source=surface ocean velocity field from hf-radar
sourceUrl=https://hfrnet-tds.ucsd.edu/thredds/dodsC/HFR/USEGC/1km/hourly/RTV/HFRADAR_US_East_and_Gulf_Coast_1km_Resolution_Hourly_RTV_best.ncd
Southernmost_Northing=21.7
standard_name_vocabulary=CF Standard Name Table v70
testOutOfDate=now-1day
time_coverage_end=2024-12-01T14:00:00Z
time_coverage_start=2012-01-01T00:00:00Z
Westernmost_Easting=262.1161

从高频雷达估计的海面流速，反映了海洋表层0.5米内的流速状况。近实时处理的主要目标是，在数据处理时利用现有数据生成最佳产品。通过美国高频雷达网络，从单个雷达站点获取径向速度测量值。对每小时径向数据在美国东海岸和墨西哥湾沿岸1公里分辨率的网格上进行无加权最小二乘法处理，以生成近实时的海面流场图。