A precise passive narrow-beam filter infrared radiometer and its use with LIDAR in the ARM program

The work done divides conveniently into two parts. First, the completion of the design and manufacture of the new narrow-beam radiometer, which occupied the period of July to December, 1992. The second part of the report concerns participation of the CSIRO Division of Atmospheric Research (DAR) Lidar/radiometer team in the ARM PROBE experiment at Kavieng, New Ireland, Papua New Guinea as part of the international TOGA COARE experiment. The DAR team participated for about one month from mid-January. The PROBE experiment allowed the new radiometer to be tested under field conditions, a test which was very successful, with very few teething problems. It is proposed during the rest of 1993 and during 1994 to make further tests with the radiometer and particularly to look at using a stirling cycle liquid nitrogen detector to obviate the need for supplies of liquid nitrogen. It is proposed further during 1994 to carry out a thorough analysis of the PROBE data and collaborate with other US PROBE participants in studying and interpreting the observations as a whole. Some further work with the new ARM radiometer will be done during the CSIRO SOCEX experiment.