Data Announcements

NSIDC News

Nimbus Data Rescue Project Releases Six New Data Sets

24 November 2015

The Nimbus Data Rescue Project has released six new data sets, now available for download at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets consist of infrared imagery, brightness temperatures, and atmospheric water vapor obtained in 1970-71 by the Temperature-Humidity Infrared Radiometer (THIR) on board the Nimbus 4 satellite. Both swath and gridded data are available. For more information, visit the following data set landing pages:

Nimbus Data Rescue Project Updates Remapped IDCS Data Sets

1 June 2015

The Nimbus Data Rescue Project at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NASA DAAC) has updated its remapped Image Dissector Camera System data sets with newly digitized imagery from the Nimbus 4 satellite. The update extends these archives to 4 April, 1971.

To learn more and obtain the new data, use the following links:

 

Data set DOIs: http://dx.doi.org/10.5067/NIMBUS/NmIDCS3G http://dx.doi.org/10.5067/NIMBUS/NmIDCS3H

Nimbus Data Rescue Project Updates IDCS Visible Imagery Data Set

15 December 2014

The Nimbus Data Rescue Project, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NASA DAAC), is pleased to announce that it has updated the Nimbus Image Dissector Camera System Visible Imagery L1, HDF5 data set with newly digitized imagery from the Nimbus 4 satellite. This update extends the archive to 8 April, 1971.

Data Set DOI: http://dx.doi.org/10.5067/NIMBUS/NmIDCS1H

NSIDC Web Site and FTP Server Down for System Maintenance

29 May 2014

From 4:30 p.m. Wednesday, June 04 until noon Friday, June 06  (USA Mountain Time), our Web site and FTP server will be unavailable due to system maintenance. We apologize for any inconvenience this may cause you.

Nimbus Images Reveal 1960s Sea Ice Edges

24 March 2014

Using satellite data from the Nimbus Data Rescue Project, NSIDC scientists have estimated the location of the North and South Pole sea ice edges at various times during the late 1960s. The researchers manually inspected thousands of recently recovered AVCS and IDCS images from 1964, 1966, and 1969-70 and placed points along visible ice edges to help delineate North and South Pole sea ice extent.

Users can download these data in Comma Separated Values (CSV) format by visiting  Nimbus Ice Edge Points from Nimbus Visible Imagery L2, CSV .

Ice edge points from 9 September, 1969 overlaid on IDCS source image. Colors indicate confidence and whether the point is an edge, lead, or region of broken ice.

Corrected Nimbus Data Available for Download

20 December 2013

New browse images are now available for download for the North and South Polar projections of the Nimbus High Resolution Infrared Radiometer Remapped Digital Data Daily L3, HDF5 (NmHRIR3H) data set.  The relative size of the continent outlines has been corrected in these images. The new files are available for download as of 19 December 2013, so if you downloaded these files prior to this date, please obtain the corrected data via:

FTP – ftp://n5eil01u.ecs.nsidc.org/SAN/NIMBUS/NmHRIR3H.001 or

Reverb – http://reverb.echo.nasa.gov/reverb/

Documentation is available at the data set webpage – http://nsidc.org/data/nmhrir3h/.

Note that the correction applies to the North and South Polar projections for all dates in the data set.  The equatorial projection files were correct and have not changed.  If you have any questions about the data correction, please contact NSIDC User Services at nsidc@nsidc.org.

Composites Offer Earliest Digital Infrared View of Earth

22 October 2013

Data users can now download global composites of the earliest known satellite-based digital infrared observations of Earth. Nimbus High Resolution Infrared Radiometer Remapped Digital Data Daily L3, HDF5, constructed by the NASA-funded Nimbus Data Rescue Project, expands the team’s data roster with daily composites of HRIR data recorded in 1964, 1966, and 1969 by the Nimbus 1, Nimbus 2, and Nimbus 3 satellites. The related data set, Nimbus High Resolution Infrared Radiometer Remapped Digital Data Daily L3, GeoTIFF, offers users GeoTIFF versions of each composites’ equatorial projection.

Visit the Nimbus Data Rescue Project Web site for more information.

Composites Pull Together Best Recovered Nimbus Images

1 October 2013

Thanks to the the NASA-funded Nimbus Data Rescue Project, users can now download daily composites of the best images recovered from the Nimbus 1, 2, and 3 missions that spanned 1964 – 1970. Global composites are available in two new data sets: Nimbus Advanced Vidicon Camera System Remapped Visible Imagery Daily L3, HDF5 and Nimbus Image Dissector Camera System Remapped Visible Imagery Daily L3, HDF5.

GeoTIFF fans can obtain the equatorial portion of the composites from the Nimbus Advanced Vidicon Camera System Remapped Visible Imagery Daily L3, GeoTIFF and Nimbus Image Dissector Camera System Remapped Visible Imagery Daily L3, GeoTIFF sites.

Nimbus Project Releases 1960s Infrared Radiometer Data

23 September 2013

The Nimbus Data Rescue Project has released its third data set: Nimbus High Resolution Infrared Radiometer Digital Swath Data Level 1. Funded by NASA, NSIDC researchers enhanced these brightness temperatures from the 1960s with a correction that significantly minimizes seemingly random alignment errors in the original data that caused cloud edges and land features to appear jagged. The data are available as HDF5 formatted files.

Rescued Nimbus 3 Images Show Earth in 1969-1970

18 July 2013

Recently recovered satellite images of Earth, captured between 23 April, 1969 to 21 January, 1970 by the Image Dissector Camera System onboard the Nimbus 3 satellite, are now available from NSIDC. A collection of more than 26,000 images, digitized from archival rolls of 70 mm black-and-white film, the Nimbus Image Dissector Camera System Visible Imagery L1, HDF5 (NmIDCS1H) data set is the second release from the Nimbus Data Rescue Project.