This book presents carefully edited and peer-reviewed papers from the 3rd International Workshop on Occultations for Probing Atmosphere and Climate (OPAC-3), held in Graz, Austria. Starting with an overview on occultation methodology and its applications, the topics comprise the use of occultation data in numerical weather prediction and atmospheric wave analysis as well as in climate monitoring and change research. It covers results from current radio occultation missions (CHAMP to Formosat-3/COSMIC) and from solar, lunar, and stellar occultation by the SCIAMACHY and GOMOS instruments onboard ENVISAT. Presenting as well upcoming occultation missions and new concepts, this work provides comprehensive insight and is a key reference on the current status in the field and towards new horizons in occultation research.
