Abstract
Earth-satellite-earth laser long-path absorption experiment was being carried out with the Retroreflector in Space. The RIS is a hollow cube-corner retroreflector with an effective diameter of 0.5 m which has an unique design having a curved mirror surface. Optical characteristics of the RIS were tested using a second harmonics Nd:YAG laser. The intensity of reflection from the RIS was analyzed with an ICCD camera by comparing the image with those of stars. It was confirmed that the RIS in orbit was working properly as a retroreflector. Spectroscopic measurement was carried out with the TEA CO2 lasers. Spectra of ozone were measured successfully with the method using the Doppler shift of return beam which is caused by the movement of the satellite. The measurement of ozone using the RIS was validated by simultaneous measurement with a laser heterodyne spectrometer.
