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6330 - USL - USU ALO Rayleigh LIDAR
Instrument Type: Instrument > OpticalInstrument > Lidar > RayleighLidar
Observatory: None
Observation Site: USL - USU ALO Rayleigh LIDAR
Operating Mode:

Instrument Page: USL

The Utah State University (USU) Rayleigh lidar at the Atmospheric Lidar Observatory (ALO) is run by the Center for Atmospheric and Space Sciences (CASS). It is located at Logan, Utah at (41.74N, 111.81W) on the roof of the Science and Engineering Research (SER) building on campus. The height is 1466 m using the WGS84 geoid to represent the earth. The lidar is operated in the vertical direction and can obtain data on all non-heavy cloud nights. (Thin cirrus clouds are OK.) An operator is present to operate the system and for aircraft safety. The lidar started operations in August 1993, with relatively regular operations up to the present except between April 1997 and May 1998 when the lidar was not operating. The lidar operates at a wavelength of 532 nm up to about 500 km, but collects meaningful data only between about 45 and 100 km. The height resolution of the data is originally 37.5 m using 3600 shots (30 per sec) over 2 minutes. However, averaging is done over 81 range gates (81*37.5m = 3.0375 km) with a sliding average reported every 112.5 m (3 range gates). The number of 2-min integrations is reported as Code 415. Hourly averages of 29 or less 2 minute intervals are calculated, where cloudy or otherwise unusable periods have been eliminated in the hourly average (kindat=17002). Nightly average profiles are also computed.