ICLAS: International Coordination-group on Laser Atmospheric Studies
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LIDAR RESEARCHER: Ms Judith L Agnew

RESEARCH ASSOCIATES: Mr A J Gibson, Mr K J Twort

MAILING ADDRESS:
CLRC Rutherford Appleton Laboratory
Chilton
Didcot
OX11 0QX
UK

TELEPHONE NUMBER: +44 1235 821900

FAX NUMBER: +44 1235 446140

E-MAIL ADDRESS: j.l.agnew@rl.ac.uk

WEB SITE: http://www.rcru.rl.ac.uk

DATE: 28/08/01

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.):
Chilbolton Observatory, UK, lat. +51°, long. -1.8°W

SITE ELEVATION: 80m

PARAMETER(S) OR CONSTITUENT(S) MEASURED: Elastic scattering, temperature, water vapour

RESEARCH OBJECTIVES AND SPONSOR: Radio refractive index (dependent on temperature and water vapour content), currently sponsored by Radiocommunications Agency in the UK.

MEASUREMENT TECHNIQUE: Raman lidar

MEASUREMENT RANGE: Approx. 12km

VERTICAL RESOLUTION: Minimum of 6m

FREQ. OF MEASUREMENT (TYPICALLY): Minimum of 10s

MEASUREMENT TIMES (TYPICALLY): Few hours

LASER TYPE AND WAVELENGTH (s): Nd:YAG, 355 nm

LASER ENERGY/PULSE: 0.3 J per pulse

PULSE REPETITION RATE: 50Hz

RECEIVER SIZE AND CONFIGURATION: 0.45m diameter, coaxial, vertically pointing

DETECTORS USED: Photomultiplier tubes

SIGNAL PROCESSING: Analog

ANALOG-T0-DIGITAL CONVERTER: Data acquisition cards

COMPUTER: 3 PCs

PLATFORM (if applicable):

PUBLICATIONS (5 recent and/or significant):

J. L. Agnew and K. J. Twort "A Raman Backscattering Lidar System for Radio Refractivity Determination", Proceedings of URSI Commission F Meeting on Climatic Parameters in Radiowave Propagation Prediction (CLIMPARA 2001), ESA WPP-184 pp. 63-67 (2001)

J. L. Agnew, A. Gibson and A. Marsh "Determination of Radio Refractivity at Altitudes up to 2 km using UV Lidar", Millennium Conference on Antennas and Propagation, ESA SP-444 (2000)

COMMENTS: The Raman scattering capabilities of this system are currently under development. The aim is to be able to make both water vapour and temperature measurements by day, up to relatively low altitudes (approx. 2km), as well as by night.

 
 

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