The CrIS and ATMS instruments on NPOESS will provide high quality temperature and moisture profiles greatly surpassing the capabilities of current operational satellite sounders. However, performance of these systems continues to be a challenge in cloudy scenes. The VIIRS sensor on NPOESS will provide much higher spatial resolution data than that of CrIS, with some overlap in spectral coverage. This sub-pixel information can be used to enhance the retrieval performance in a number of ways. This paper presents a potential technique to improve performance of the CrIS temperature profile retrievals by incorporating data from VIIRS. Improvements include more accurate retrievals in partly cloudy situations, better effective spatial resolution and more robust quality control diagnostics. We provide an overview of our approach and show examples utilizing data from the EOS-Aqua AIRS, AMSU and MODIS sensors.
The National Polar-orbiting Operational Environmental Satellite System (NPOESS) will produce 54 environmental data products serving military and civil operational users and the science community, supporting the atmospheric, cloud, land, ocean/water, earth radiation budget, and space remote sensing disciplines. Data products that are key to operations included imager, atmospheric temperature and moisture profiling, sea surface temperature and wind speed/direction, and soil moisture. NPOESS exploits advanced sensor and data product development on the Earth Observing System (EOS) and other envirosats, including a predecessor mission, the NPOESS Preparatory Project (NPP). The NPOESS data products will be used in weather forecasting, operational decision making, and climate monitoring. The products are delivered with low latency following data acquisition on-orbit by using downlink to a globally distributed network. Synergistic interconnected processing of data products is used to improve quality and reliability. Because the NPOESS system will serve for many years, planning hgas included consideration of product improvements and long term measurement stability for support to climate monitoring.
The overall objective of the NPOESS Preparatory Project (NPP)/National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Joint Government Shared System Performance Responsibility (SSPR) Contractor Calibration Validation (CalVal) Program is to ensure the environmental data products meet the system specification, and satisfy the users and scientific community. Work spans all program phases, from pre-launch sensor characterization and data prduct verification to on-orbit calibration verification/data product validation and long-term data product quality monitoring/maintenance. A cooperative approach is in place to leverage expertisxe throughout the program-developer, government-customer and users, and scientific community. Draft Calibration and Validation Plans are in development and NPP pre-launch activities are under way. This paper provides an NPP/NPOESS Cal Val Program system perspective, describes the cooperative strategy, and summarizes progress and planned activities to ensure a successful NPP mission.