The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center in collaboration with the NASA Water Vapor Project-Measures (NVAP-M) team announces the release the following data sets:
• NVAP-M Climate • NVAP-M Ocean
• NVAP-M Weather
Distinguishing features of the NVAP-M dataset:
• Global (land and ocean) data coverage
• Uses consistent, intercalibrated data sources
• Uses consistent, peer-reviewed algorithms
• Uses new data sources
• Three-tiered production format for a variety of users
The NASA Water Vapor Project (NVAP-M) water vapor data sets comprise a combination of: NASA Atmospheric Infrared Sounder (AIRS) retrievals, Special Sensor Microwave/Imager (SSM/I) retrievals, radiosonde observations, High Resolution Infrared Sounder (HIRS) profiles, and Global Positioning System (GPS) observations. These data sets span 22 years (1988 - 2009) and contain total and four layers of precipitable water vapor.
The NASA MEaSUREs program began in 2008 and has the goal of creating stable, community accepted Earth System Data Records (ESDRs) for a variety of geophysical time series. A reanalysis and extension of the NASA Water Vapor Project (NVAP), called NVAP-M was performed as part of this program.
The data sets can be accessed at the NVAP-M Data and Information page.