The development of the length-modulated radiometer (LMR), which is a n
ew type of correlation radiometer for remote sounding, is described. F
actors that affect the performance of the LMR are identified and, when
ever possible, are minimized. Laboratory measurements of the radiometr
ic response of a LMR filled with carbon monoxide are presented and com
pared with theoretical calculations. An analysis of the sources of err
or in these measurements and calculations is presented. (C) 1997 Optic
al Society of America.