Measurement theory and results from testing a breadboard multiwavelength (355-, 532- and 1064-nm) laser altimeter over horizontal paths are presented. They show that pressure accuracies of 3 mbar can be achieved when ranging at nadir to cube corner targets when using a 500-psec resolution waveform digitizer and utilizing new calibration techniques. Streak camera-based receivers will be required for the same or higher accuracies when ranging to the ocean surface. System design calculations for aircraft and spaceborneexperiments are presented.
James B. Abshire and James E. Kalshoven, Jr., "Multicolor laser altimeter for barometric measurements over the ocean: experimental," Appl. Opt. 22, 2578-2585 (1983)