Data Announcements

The SMAP Radiometer Twice-Daily rSIR-Enhanced EASE-Grid 2.0 Brightness Temperatures, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains twice-daily brightness temperature data derived from the SMAP radiometer and applies the same Scatterometer Image Reconstruction (SIR) technique used to derive brightness temperatures from the SMMR, AMSRE, and SSM/I-SSMIS sensors.

The SMAP satellite returned to science mode and resumed collecting science data on 23 July 2019 at 22:28 UTC. These data are now available. The SMAP science team has completed a preliminary data assessment and flagged the first ~25 seconds for quality concerns, as described in this advisory note.

The SMAP satellite returned to science mode and resumed collecting science data on 23 July 2019 at 22:28 UTC. However, data collected and processed after 23 July 2019 will not be available until the SMAP science team completes a data quality assessment. NSIDC will continue to provide updates as we gain a better understanding of data availability.

The MEaSUREs Global Record of Daily Landscape Freeze/Thaw Status, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data for 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains two global records of the daily freeze/thaw (F/T) status of the landscape.

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data from December 2018 and January 2019.

The ASO L4 Lidar Snow Depth 3m UTM Grid, Version 1; ASO L4 Lidar Snow Depth 50m UTM Grid, Version 1; and ASO L4 Lidar Snow Water Equivalent 50m UTM Grid, Version 1 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to include new data for 2013 and 2018.

The IceBridge Watson-Gyro Fluxgate Magnetometer L1B Time-Tagged Magnetic Field, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) from 29 December 2008 through 14 January 2013. This data set contains time-registered Level-1B field readings taken over Antarctica using the Watson-Gyro Fluxgate Magnetometer instrument. The data were collected as part of Operation IceBridge funded aircraft survey campaigns.

The High Mountain Asia GFDL FLOR Modeled Daily Precipitation for Extreme Analysis, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set includes three climate simulations of daily precipitation over the Himalayan region for summer and winter: two 30-member ensemble simulations from 1961-2000 and 2061-2100, and one present-day climate simulation from 1982 to 2017 forced with observed sea surface temperatures, air temperatures, and winds.

The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 5 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains daily gridded brightness temperatures derived from the Special Sensor Microwave/Imager (SSM/I) sensor aboard the Defense Meteorological Satellite Program (DMSP) F8, F11, and F13 platforms and the Special Sensor Microwave Imager/Sounder (SSMIS) sensor aboard the DMSP F17 and F18 platforms.

NOAA@NSIDC is pleased to announce that the Sea Ice Index has been updated from near-real-time data to final data for the time period 01 January 2018 through 31 December 2018. Initially, when the Sea Ice Index is first processed, it uses a near-real-time (NRT) sea ice concentration product as it input. This NRT product can contain missing data and has less quality control procedures applied to it than the final sea ice concentration input product provided by NASA Goddard. However, the final input product often lags behind the present by approximately a year.

On the evening of 19 June 2019, SMAP went into safe mode and data collection was disrupted. SMAP is currently in standby mode. The task team is in communication with the satellite and working to restore normal operations. On 02 July 2019 the Non-volatile Memory (NVM) Parameter Management (NPM) backup partition was successfully recovered. The attempt to recover additional partitions will continue while SMAP is in standby mode. NSIDC will continue to provide updates as we learn more information and gain a better understanding of the timeframe for resuming data collection.

The Snow Data Assimilation System (SNODAS), Version 1 data set, accessible through the NOAA@NSIDC program at the National Snow and Ice Data Center (NOAA@NSIDC), was updated to correct for an extra “./“ in some of the data file paths. Users accessing this data set through a script may need to update their scripts to account for this correction. In addition, the filename extensions for the uncompressed header files (.hdr) have been renamed to text (.txt) format.

The NASA Jet Propulsion Laboratory (JPL) and the National Snow and Ice Data Center (NSIDC) are pleased to announce the ITS_LIVE Regional Glacier and Ice Sheet Surface Velocities, Beta Version data sets are now accessible through the JPL and NSIDC.

The DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been extended through 03 April 2019. This data set contains brightness temperatures derived from the Special Sensor Microwave/Imager (SSM/I) and the Special Sensor Microwave Imager/Sounder (SSMIS) instruments. The spatial resolution is 25 km for all channels; the 85 and 91 GHz channels are also provided at a 12.5 km resolution.

On the evening of 19 June 2019, SMAP went into safe mode and data collection was disrupted. A task team has made progress in communicating with the satellite and diagnosing the malfunction. While they continue to work to return SMAP to normal operations, all instruments remain off. Currently, SMAP has been returned to standby mode with nominal nadir pointing and spinning antenna. Data collection has not restarted.

On the evening of 19 June 2019, the SMAP satellite went into safe mode. Subsystems are investigating the cause and possible solutions. In the meantime, all instruments are shutdown and there is no science data collection. While SMAP remains in safe mode, generation of the model-based Level-4 product will continue, but the Level-4 data will not be informed by contemporaneous SMAP observations. As NSIDC gets updates, we will post more details on the state of the spacecraft and data for all product levels.

The Arctic Sea Ice Seasonal Change and Melt/Freeze Climate Indicators from Satellite Data, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated from a basic to a standard level of service. Please review our Levels of Service (LoS) page for more information.

The ATLAS/ICESat-2 L3A Ocean Surface Height, Version 1 data set from the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) mission is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains along-track sea surface heights at variable length scales over cloud-free regions. Estimates of height distributions, surface roughness, surface slope, and apparent reflectance are also provided.

NOAA@NSIDC and the University of Colorado (CU) Boulder Libraries are pleased to announce that the Glacier Photograph Collection (GPC) has recently been updated with over 8,000 new historical images, collected from 1883 through 2012. The GPC holds digital images of glaciers from around the world, most of which were digitized by scanning prints or glass negatives, but many that also originated in digital form. Some of the images date back to the mid-19th century and provide an historical reference for glacier extent.

Two additional High Mountain Asia data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The High Mountain Asia Landslide Catalog, Version 1 data set includes landslide event locations and characteristics from February 1956 to December 2018. The High Mountain Asia Langtang Snow Properties, Version 1 data set contains surface area measurements from the Yala Glacier, Nepal on 23-24 April 2018.