This book presents carefully edited and peer-reviewed papers from the 2nd International Workshop on Occultations for Probing Atmosphere and Climate (OPAC-2), held in Graz, Austria. It covers results from the radio occultation (RO) experiment onboard CHAMP and from the stellar occultation experiment GOMOS onboard ENVISAT, wave optics algorithms for the processing of RO data in the troposphere, future occultation missions, the novel LEO-LEO crosslink concept, and the use of RO data in numerical weather prediction, atmospheric studies and climate research. This work provides a comprehensive insight and a key reference about the current status and future of the field of occultations for probing atmosphere and climate.
1. Radio Occultation with CHAMP: Mission Status, Retrieval, Validation, and Error Analysis.- 2. Stellar Occultation with GOMOS: Retrieval, Validation and Error Analysis.- 3. Wave Optics Algorithms for the Processing of Radio Occultation Data.- 4. Future GNSS Occultation Missions and the LEO-LEO Occultation Concept.- 5. Use of GNSS Occultation Data in Numerical Weather Predicion and in Atmospheric Studies.- 6. Use of GNSS Occultation Data for Climate Monitoring and Climate Change Studies.- Author Index.