Dataset Edition

Présentation générale
Nom du jeu de donnéesUPS_UHF WindProfiler Data_Save
DOI10.6096/DACCIWA.1618
Créé le2016-11-29
Projet(s)DACCIWA > WP1 - Boundary Layer Dynamics
Date de début (yyyy-mm-dd)2016-06-13Date de fin (yyyy-mm-dd)2016-07-31
Contact(s)

Accès aux données Dataset as provided by the Principal Investigator
 Charts from the campaign website
History

ISSUE2017-01-11

Description du jeu de données
RésuméThis dataset contains the observation made continuously by the UHF wind profiler at Savé supersite during the 2016 summer field campaign.

It includes horizontal wind vertical profiles every 2 minutes, along with associated variables such as radar reflectivity, Doppler spectral width and skewness, noise level and other radar variables.
Strategie d'observationThe radar ran continuously during the ground-based campaign.
A cycle of emission along 5 beams alternatively (1 vertical beam and 4 oblique beams) enabled to estimate the three components of the wind over the vertical.

Two modes were alternatively considered during a cycle of measurement:
- High acquisition mode supplied measurements from 150 m to about 6 km every 150 m.
- Low acquisition mode supplied measurements from 75 m to about 3.5 km every 75 m.
The two modes correspond to 2 different datafiles.
Description de l'instrument
Type d'instrumentEarth Remote Sensing Instruments > Active Remote Sensing > Spectrometers/Radiometers > Lidar/Laser Spectrometers > BACKSCATTER LIDAR
FabricantDegreane Horizon
Observation frequencyevery 2 min
Vertical coverage0-7km
Longitude (°)2.4279Latitude (°)8.001
Height above ground (m)166
Information géographique
Site 1
Mot-clé de localistionCONTINENT > AFRICA > WESTERN AFRICA > BENIN
SiteSavé Supersite, near Gobé, INRAB institute, Benin
Type de plateformeIn Situ Land-based Platforms > GROUND-BASED OBSERVATIONS
Longitude minimale (°)2.4267Longitude maximale (°)2.4367
Latitude maximale (°)8.0071Latitude minimale (°)8
Paramètres mesurés
Paramètre mesuré 1
Nom du paramètreRefractive index structure coefficien
Mot-clé du paramètreAtmosphere
Unitém-2/3 - m-2/3
Méthodologie d'acquisition et qualitéFrom the received power, the radar reflectivity can be deduced, as well as the refractive index structure coefficient, which is a function of the reflectivity and emitted wavelength. It is linked with the intensity of the received echo, and connected to the fluctuations of moisture and temperature within the resolution volume.Power aspect ratio is the ratio between the power received from the vertical beam to the power received by the oblique beams. It is larger in case of specular echoes, and smaller in case of all-direction retrodiffusion.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Paramètre mesuré 2
Nom du paramètrePower aspect ratio
Mot-clé du paramètreAtmosphere
UnitédB
Méthodologie d'acquisition et qualitéPower aspect ratio is the ratio between the power received from the vertical beam to the power received by the oblique beams. It is larger in case of specular echoes, and smaller in case of all-direction retrodiffusion.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Paramètre mesuré 3
Nom du paramètreVertical velocity spectral width
Mot-clé du paramètreAtmosphere
Unitémeter - m
Méthodologie d'acquisition et qualitéThis is the width of the Doppler spectrum obtained over the vertical beam. It is generally larger in turbulent flows, and smaller in laminar flows.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Paramètre mesuré 4
Nom du paramètreNoise level
Mot-clé du paramètreAtmosphere
UnitédB
Méthodologie d'acquisition et qualitéFor each beam and each gate, the level of noise can be estimated. A vertical average over each beam is given in the datafiles.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Derived parameter 1
Nom du paramètreEastward component of the wind U
Mot-clé du paramètreAtmosphere > Atmospheric Winds
Unitémeter per second - m/s
Méthodologie d'acquisition et qualitéFrom Doppler spectra obtained over 5 beams. The detection of meteorological peak enables to obtain the radial velocity over each beam, at each gate. The eastward component is obtained from the combination of the measurements along the 4 oblique beams.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Derived parameter 2
Nom du paramètreNorthward component of the wind V
Mot-clé du paramètreAtmosphere > Atmospheric Winds
Unitémeter per second - m/s
Méthodologie d'acquisition et qualitéFrom Doppler spectra obtained over 5 beams. The detection of meteorological peak enables to obtain the radial velocity over each beam, at each gate. The northward component of the wind is obtained from the combination of the measurements along the 4 oblique beams.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Derived parameter 3
Nom du paramètreAir vertical velocity W
Mot-clé du paramètreAtmosphere > Atmospheric Winds
Unitémeter per second - m/s
Méthodologie d'acquisition et qualitéFrom Doppler spectra obtained over 5 beams. The detection of meteorological peak enables to obtain the radial velocity over each beam, at each gate. The air vertical velocity is obtained from the combination of the measurements along the 5 oblique beams.
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Information sur l'utilisation des données
Conditions d'utilisation des donnéesThe research leading to these results has received funding from the European Union Seventh Framework Programme FP7/2007-2013) under grant agreement n° 603502.
Charte d'accès aux donnéesCreative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License
Base de donnéesDacciwa database
Format des fichiers de donnéesNetCDF