Experimental Cloud Lidar Pilot Study

Project Description
Cloud Lidar Pilot Study (ECLIPS)Objectives:

1.Demonstrate feasibility of obtaining a long-term climatology of
cloud base and optical depth.
2.Improve methods of satellite cloud retrieval.
3.Obtain a data set of cloud optical properties complementary to the
ISCCP data set. The data would be handled through a designated data
center to the NCDS NASA Climate Data Center.

Contact Information:

LIDAR RESEARCHER:
C. Martin R. Platt, Stuart A. Young, Richard T. Austin

RESEARCH ASSOCIATES:
Graeme R. Patterson and Stephen C. Marsden

MAILING ADDRESS:
CSIRO
Division of Atmospheric Research
Private Mail Bag No. 1
Aspendale 3195 Victoria
AUSTRALIA

TELEPHONE NUMBER:
(613) 9239 4665, (613) 9239 4589

FAX OR TELEX NUMBER:
(613) 9239 4444

ELECTRONIC MAIL ADDRESS:
say@larry.dar.csiro.au, cmp@larry.dar.csiro.au

Technical Information:

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.):
Aspendale, Australia (-38.0, 145.1)

SITE ELEVATION:
2.1 m (7 ft) MSL

MEASUREMENT TECHNIQUE:
Incoherent backscatter

PARAMETER(S) OR CONSTITUENT(S) MEASURED:
Clouds, Plume dispersion, stratospheric aerosols

MEASUREMENT RANGE:
0.1 - 40 km

VERTICAL RESOLUTION:
0.75m - 15 m (clouds); 60 m (stratosphere)

FREQ. OF MEASUREMENT (TYPICALLY):
Periodic, intensive studies of clouds and plumes;
monthly 1991-1993, 1997 - (stratospheric aerosols)

MEASUREMENT TIMES (TYPICALLY):
Day (clouds & plumes); night (clouds & stratosphere)

LASER TYPE AND WAVELENGTH:
Nd:YAG, 1064, 532, 355 nm

PULSE REPETITION:
10 pps

LASER ENERGY/PULSE:
0.35 J (1064), 0.15 J (532), 0.05 J (355)

PLATFORM:
Ground-based, mobile caravan

RECEIVER SIZE AND CONFIGURATION:
35 cm (14 inch) modified Cassegrain

RECEIVER FIELD-OF-VIEW:
2 - 12 mrad

RECEIVER BANDWIDTH:
1 nm

DETECTORS USED:
2 x EMI 9816BM (S20 photocathode) for 532, 355nm,
RCA C30955E + AM312A amp. for 1064nm

SIGNAL PROCESSING:
Analog

ANALOG-T0-DIGITAL CONVERTER:

1) Sony-Tektronix RTD710A, 10-bit, dual-channel digitizer with 256kb
buffer memory,

2) National VP5740A, 8-bit, dual-channel, digital storage oscilloscope.

COMPUTER:
Pentium + 386-PC networked via OS/2-Warp Connect