GPS Radio Occultation (IMAGE) Naval Research Laboratory Caption This is a schematic of a rising GPS occultation. The high vertical density of the profiles is accomplished via multiple paths through the atmospheric layers. The DMSP SSMIS F18 microwave radiances at 37 GHz are overlaid on the earth. Credit U.S. Naval Research Laboratory - Marine Meteorology Division Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.