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SPLASH Field Study; CLAMPS2 Doppler Lidar VAD Data (NCEI Accession 0304717)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 29, 2026 | Last Modified: 2025-06-04T00:00:00.000+00:00
These files contain 24-hour periods of data collected from the CLAMPS2 Halo Streamline XR+ Doppler lidar. The Doppler lidar conducts regular conical scans at a set elevation angle. These data are then passed through a typical VAD algorithm to retrieve horizontal wind speed and direction profiles. These data were collected during the SPLASH project. Data collection and processing: For the SPLASH campaign, the CLAMPS2 Doppler lidar collected PPI scans at 60 deg elevation every 5 minutes. The Doppler lidar provides range-resolved, line-of-sight measurements of radial velocity, intensity (signal-to-noise ratio [SNR]+1), and attenuated backscatter. In the case of PPI scans meant for VAD analysis, these data are passed through a VAD code to produce profiles of horizontal wind speed and direction. Vertical velocity is also provided, but it is not as high quality as vertical velocity more directly measured by vertical stares. The provided files provide the intensity field (SNR+1), which can be used as a ‘filter’ for noise. A good rule of thumb cutoff is 1.01. Data format: Data are provided in netcdf format. The typical naming convention is clampsdlvad1turnC2.c1.YYYYMMDD.HHmmss.cdf, following closely to ARM file naming convention. The files have time and height dimensions.

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0304717 WIND DIRECTION WIND SPEED LIDAR meteorological remote sensing NOAA National Severe Storms Laboratory NOAA Physical Sciences Laboratory NOAA Physical Sciences Laboratory meteorology DOC/NOAA/OAR/ESRL/PSL > Physical Sciences Laboratory, Earth System Research Laboratory, OAR, NOAA, U.S. Department of Commerce DOC/NOAA/OAR/NSSL > National Severe Storms Laboratory, OAR, NOAA, U.S. Department of Commerce SPLASH - Study of Precipitation, the Lower Atmosphere, and Surface for Hydrometeorology EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND DIRECTION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS alt base_time height hour intensity lat lon rms time_offset wdir wspd LIDAR > Light Detection and Ranging Halo Streamline XR+ and Doppler lidar (DL) CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > COLORADO X2F3HA

Complete Metadata
@type dcat:Dataset
accessLevel non-public
contactPoint 
                                            {
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describedByType application/octet-steam
description These files contain 24-hour periods of data collected from the CLAMPS2 Halo Streamline XR+ Doppler lidar. The Doppler lidar conducts regular conical scans at a set elevation angle. These data are then passed through a typical VAD algorithm to retrieve horizontal wind speed and direction profiles. These data were collected during the SPLASH project. Data collection and processing: For the SPLASH campaign, the CLAMPS2 Doppler lidar collected PPI scans at 60 deg elevation every 5 minutes. The Doppler lidar provides range-resolved, line-of-sight measurements of radial velocity, intensity (signal-to-noise ratio [SNR]+1), and attenuated backscatter. In the case of PPI scans meant for VAD analysis, these data are passed through a VAD code to produce profiles of horizontal wind speed and direction. Vertical velocity is also provided, but it is not as high quality as vertical velocity more directly measured by vertical stares. The provided files provide the intensity field (SNR+1), which can be used as a ‘filter’ for noise. A good rule of thumb cutoff is 1.01. Data format: Data are provided in netcdf format. The typical naming convention is clampsdlvad1turnC2.c1.YYYYMMDD.HHmmss.cdf, following closely to ARM file naming convention. The files have time and height dimensions.
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identifier gov.noaa.nodc:0304717
issued 2025-05-30T00:00:00.000+00:00
keyword 
                                            [
  "0304717",
  "WIND DIRECTION",
  "WIND SPEED",
  "LIDAR",
  "meteorological",
  "remote sensing",
  "NOAA National Severe Storms Laboratory",
  "NOAA Physical Sciences Laboratory",
  "NOAA Physical Sciences Laboratory",
  "meteorology",
  "DOC/NOAA/OAR/ESRL/PSL > Physical Sciences Laboratory, Earth System Research Laboratory, OAR, NOAA, U.S. Department of Commerce",
  "DOC/NOAA/OAR/NSSL > National Severe Storms Laboratory, OAR, NOAA, U.S. Department of Commerce",
  "SPLASH - Study of Precipitation, the Lower Atmosphere, and Surface for Hydrometeorology",
  "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND DIRECTION",
  "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED",
  "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS",
  "alt",
  "base_time",
  "height",
  "hour",
  "intensity",
  "lat",
  "lon",
  "rms",
  "time_offset",
  "wdir",
  "wspd",
  "LIDAR > Light Detection and Ranging",
  "Halo Streamline XR+ and Doppler lidar (DL)",
  "CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > COLORADO",
  "X2F3HA"
]
landingPage https://www.ncei.noaa.gov/contact
language 
                                            []
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2025-06-04T00:00:00.000+00:00
publisher 
                                            {
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
}
references 
                                            [
  "https://data.nssl.noaa.gov/thredds/catalog/FRDD/CLAMPS/campaigns/SPLASH/CLAMPS2/dlvad/catalog.html",
  "https://doi.org/10.5281/zenodo.7308917"
]
rights otherRestrictions
spatial -106.98782,38.86971,-106.98782,38.86971
temporal 2021-10-06T00:00:00+00:00/2022-01-18T00:00:00+00:00
title SPLASH Field Study; CLAMPS2 Doppler Lidar VAD Data (NCEI Accession 0304717)

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