NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)
Data Updates
The SMAP Level-4 Data Sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to version 7. For all Level-4 data products, data from the entire time series (31 March 2015 to present) are now available. Version 6 data products will be retired on 30 November 2022.
The SMAP data acquired after anomaly recovery have been determined to be high quality and consistent with the data acquired prior to the anomaly. The radiometer calibration is stable within 0.1 K and the footprint uncertainty is within 3 km. L1 brightness temperature, L2-L3 radiometer soil moisture, and freeze/thaw products acquired since anomaly recovery will be available at NSIDC on October 7, 2022. The L4 Soil moisture/Carbon products will restart assimilation of SMAP TB observations beginning with data from October 3, 2022.
The MEaSUREs Multi-year Reference Velocity Maps of the Antarctic Ice Sheet, Version 1 is now available from the National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set consists of three as-complete-as-possible maps of ice velocities on the Antarctic Ice Sheet for the time periods 1995-2001, 2007-2009, 2014-2017. The maps are posted at 450 m.
The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 data sets, are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These Near Real-Time data are available within three hours of satellite observation.
The Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 2 data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). With Version 2, the data are now provided in NetCDF format and temporal coverage begins on 1 November 2021. Links to scripts that convert the NetCDF back to the original binary format are available in the data set documentation. The Version 1 data in binary format will remain available until 31 December 2022.
The MEaSUREs BedMachine Antarctica, Version 3 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is now available. Additional ice thickness data have been used, thinning rates have been updated, and the International Bathymetric Chart of the Southern Ocean (IBCSO) version 2 has been used for ocean bathymetry. A new parameter, dataid, has also been added to help with identifying the data source used for each cell.
The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 4 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated. New data from 31 March 2022 to 22 June 2022 have been added.
A Science Mission Directorate (SMD) Request for Information (RFI) was released on September 8, 2022 by the NASA Solicitation and Proposal Integrated Review and Evaluation System (NSPIRES). This RFI seeks input from the science community that will be considered in the development and implementation of a Terra, Aqua, and Aura (T, A, & A) Drifting Orbits workshop. This workshop will be held virtually on November 1-2, 2022.
The Enhanced-Resolution SSM/I and AMSR-E Daily Polar Brightness Temperatures, Version 1 data set will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 31 October 2022. Access to the data will no longer be available, but the data set documentation will remain available for future reference.
The SnowEx20-21 QSI Lidar DEM 0.5m UTM Grid, Version 1, SnowEx20-21 QSI Lidar Snow Depth 0.5m UTM Grid, Version 1, and SnowEx20-21 QSI Lidar Vegetation Height 0.5m UTM Grid, Version 1 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).
New versions for the MEaSUREs Greenland Annual/Quarterly/Monthly Ice Sheet Velocity Mosaics from SAR and Landsat and the MEaSUREs Greenland 6 and 12 day Ice Sheet Velocity Mosaics from SAR data sets are now available through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).
The Terra satellite is scheduled to undergo Constellation Exit Maneuvers (CEM) on October 12 and 19, 2022. All science data acquisition will remain suspended for a period of about 10 days as MODIS will remain in a CEM configuration mode until instruments are brought back to their nominal status. Following the last maneuver on October 19, an outgas procedure will be performed and all things are expected to stabilize within 48 hours after that. Consequently, there will be a Terra MODIS data outage starting on October 10 and extending through October 19.