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Data Set ID:
IODMS0

IceBridge DMS L0 Raw Imagery, Version 1

This data set contains level zero imagery taken from the Digital Mapping System (DMS) over Antarctica and Greenland. The data were collected as part of Operation IceBridge funded aircraft survey campaigns.

Geographic Coverage

Parameter(s):
  • Visible Wavelengths > Visible Imagery
Spatial Coverage:
  • N: 90, S: 60, E: 180, W: -180

  • N: -53, S: -90, E: 180, W: -180

Spatial Resolution:
  • Varies x Varies
Temporal Coverage:
  • 16 October 2009 to 25 July 2017
(updated 2017)
Temporal Resolution: Varies
Data Format(s):
  • JPEG
Platform(s) DC-8, HU-25C, P-3B
Sensor(s): DMS
Version: V1
Data Contributor(s): Roseanne Dominguez
Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Dominguez, R. 2010, updated 2017. IceBridge DMS L0 Raw Imagery, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: http://dx.doi.org/10.5067/UMFN22VHGGMH. [Date Accessed].

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Detailed Data Description

Format

The data files are JPEG image format.

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File and Directory Structure

Data files are on the FTP site https://n5eil01u.ecs.nsidc.org/icebridge/iodms0.001/ in folders organized by year and location, for example /2009_AN_NASA/ and /2016_GR_NASA/, where AN = Antarctica, and GR = Greenland.

Sub-directories containing raw JPEG images are named by month (MM), day (DD), and year (YYYY), for example /03142013_raw/.

DMS Camera Calibration Summary

The IceBridge DMS L0 Camera Calibration files contain DMS camera calibration summary reports in PDF format for IceBridge DMS missions flown over Antarctica and Greenland.

The Camera Calibration Report summary PDF files include lens characterization of the instrument, that is, the lens camera-body-specific distortion. DMS is currently on its 23rd camera (Late 2016), and there is a new calibration for each camera. Typically the science team found that after about 400,000 exposures, the camera life degraded to the point where even after maintenance the camera was no longer usable for mission purposes, so a new camera was obtained to carry on with the next campaigns. Table 1 lists the calibration reports for each IceBridge DMS campaign. There are one or two calibration summary files per campaign. If the primary camera failed during the campaign, and the second camera was used, there are two files for that campaign.

To access calibration reports by campaign, see the User Guide for IceBridge DMS L0 Camera Calibration.

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File Naming Convention

Files are named using the conventions shown below. File name variables are described in Table 1:

2012_03_06_00007.JPG 
YYYY_MM_DD_nnnnn.JPG

Where:

Table 1. File Naming Convention
Variable Description
YYYY Four-digit year
MM Two-digit month
DD Two-digit day
fffff Frame number (some frame numbers are 4 digits)
.JPG Indicates JPEG image file
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File Size

Files range from approxmiately 1 MB to 17 MB.

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Volume

The entire data set is approximately 42.9 TB.

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Spatial Coverage

Spatial coverage for the IceBridge DMS campaigns includes Antarctica, Greenland, and Arctic and Antarctic sea ice.

Arctic / Greenland:
Southernmost Latitude 60° N
Northernmost Latitude: 90° N
Westernmost Longitude: 180° W
Easternmost Longitude: 180° E

Antarctic:
Southernmost Latitude: 90° S
Northernmost Latitude: 53° S
Westernmost Longitude: 180° W
Easternmost Longitude: 180° E

Spatial Resolution

Pixel size is dependent on flight altitude and referenced DEM. Spatial resolution is 10 cm for images acquired at 1500 ft AGL.

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Temporal Coverage

These data were collected beginning 16 October 2009 to 25 July 2017 as part of Operation IceBridge funded campaigns.

Temporal Resolution

IceBridge campaigns are conducted on an annual repeating basis. Arctic and Greenland campaigns are conducted during March, April, and May, and Antarctic campaigns are conducted during October and November.

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Parameter or Variable

Parameter Description

The DMS Level-0 files contain 3-banded imagery.

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Software and Tools

The image files can be opened using any software capable of displaying JPEG files.

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Data Acquisition and Processing

Data Acquisition Methods

DMS is a visible imaging system, capturing data throughout flight. Level-0 products for raw DMS include raw JPEG files. Most imagery were acquired in panchromatic mode, but all provided output is 3-banded imagery.

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Sensor or Instrument Description

The DMS airborne digital camera acquires high resolution natural color and panchromatic imagery from low and medium altitude research aircraft. The system configuration includes a 21 megapixel Canon EOS 5D Mark II digital camera, computer-controlled intervalometer, and an Applanix POS/AV precision orientation system. In-flight operators maximize image quality with adjustments to exposure and intervalometer settings.

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References and Related Publications

Contacts and Acknowledgments

Roseanne Dominguez
Airborne Sensor Facility
NASA Ames Research Center
MS 244-15
Moffett Field, CA 94035-1000 USA

Acknowledgments: 

DMS is supported by the NASA Airborne Science Program. Data collection and exceptional image quality is the result of the phenomenal efforts of our field team: Robert Billings, Kent Dunwoody, Eric Fraim, Dennis Gearhart and James Jacobson. Software integration and development was provided by Dr. Haiping Su (UCSC).

Document Information

Document Creation Date

16 April 2013

Document Revision Date

19 August 2013

01 April 2014

05 August 2014

20 April 2015

01 September 2015

24 May 2016

20 July 2016

21 November 2016

14 August 2017

21 September 2017

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