On Wednesday, September 27, from 9:30 a.m. to 12:00 p.m./noon (USA Mountain Time), AMSR-E, Aquarius, IceBridge, ICESat/GLAS, MEaSUREs, MODIS, NISE, SMAP, and VIIRS data will not be available due to system maintenance.

Get Data

DOWNLOADING DATA VIA HTTPS

To learn more about Earthdata Login and to register for an account, please see How to Register with Earthdata Login. Once you have logged in, data can be downloaded via a Web browser, command line, or client. For help with downloading data, please see Options Available for Bulk Downloading Data from HTTPS with Earthdata Login.

HTTPS

Data Set ID:
NSIDC-0154

CLPX Airborne: Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) Data, Version 1

This data set consists of apparent surface reflectance, subpixel snow-covered area and grain size inferred from data acquired by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS).

Geographic Coverage

Parameter(s):
  • Snow/Ice > Snow Cover > Grain Size
  • Surface Radiative Properties > Reflectance
  • Snow/Ice > Snow Cover
Spatial Coverage:
  • N: 41, S: 39.7, E: -105.5, W: -107

Spatial Resolution: Not Specified
Temporal Coverage:
  • 19 February 2002 to 20 February 2002
  • 25 March 2002 to 1 April 2002
  • 4 April 2002 to 8 April 2002
Temporal Resolution: Not specified
Data Format(s):
  • Binary
Platform(s) AIRCRAFT
Sensor(s): AVIRIS
Version: V1
Data Contributor(s): Thomas Painter
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.

Painter, T. 2006. CLPX Airborne: Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) Data, 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/R92TRY26ZN2Q. [Date Accessed].

Back to Top

Collapse All / Open All

Detailed Data Description

AVIRIS data have the following characteristics:

  • Spectral range: 400-2500 nm
  • Spectral resolution: 10 nm
  • Spatial resolution: 1.5 m (variable)
  • Swath width: 1.0 km (variable)
  • Processing level: apparent surface reflectance, subpixel snow-covered area and grain size
  • Sampling: scene based (~ 815 samples, 512 lines)
  • Temporal coverage: April 4-8, 2002; February 19-20, 2003; March 25-April 1, 2003
  • Spatial coverage: [39.70N, 1070W] to [410N, 105.50W], not complete coverage
Format

Apparent surface reflectance: binary, short integer
Subpixel snow-covered area: binary, floating point (data range N [0.0,1.0])
Subpixel snow grain radius: binary, floating point (data range N [0, 1100 micrometers])

Background color on
File and Directory Structure

Data are available on the HTTPS site in thehttps://daacdata.apps.nsidc.org/pub/DATASETS/CLP/data/airborne/nsidc0154_aviris/ directory. Within this directory, there are three folders and a readme file. One folder contains data for the Intensive Observation Period 4 (IOP-4), one folder contains data for reflectances, and one folder contains data for radiances. Within the IOP folder, data files are organized by study area location.

Background color on
File Naming Convention

The following codes are used in filenames:

File names include location names.
Reflectance files include ".rfl" in the file name.
Radiance files include ".img" in the file name.
Grain size files include ".grnsz" in the file name.
Snow cover files include ".snow" in the file name. 
Vegitation cover files include ".veg" in the file name.

Each file is named by its location and then a date of the form yymmdd.

Background color on
File Size

File sizes range from 2 B to 242 MB.

Background color on
Volume

Total data volume is 1.1 GB.

Background color on
Spatial Coverage

Southernmost Latitude: 39.70 N 
Northernmost Latitude: 41.00 N 
Westernmost Longitude: 107.00 W 
Easternmost Longitude: 105.50 W

Coverage is not continuous.

Spatial Resolution

Spatial resolution is approximately 1.5 m.

Background color on
Temporal Coverage

AVIRIS measurements were made on 4-8 April 2002; 19-20 Februrary 2003; and 25 March-1 April 2003.

Background color on
Parameter or Variable

Apparent surface reflectance

Subpixel snow-covered area

Grain size

Parameter Description

AVIRIS measures calibrated radiance. The data include apparent surface reflectance, subpixel snow-covered area, and grain size.

For a complete description of parameters and measurements, please refer to the Measurements section of the CLPX Plan.

Background color on

Data Acquisition and Processing

For complete information about data acquisition and processing regarding CLPX, please see the Cold Land Processes Field Experiment (CLPX) Plan Web Site.

For complete information about data acquisition and processing, please see JPL's AVIRIS Data Facility Web site.

Background color on

References and Related Publications

Contacts and Acknowledgments

Thomas H. Painter
Jet Propulsion Laboratory
M/S 300-233
4800 Oak Grove Dr.
Pasadena, California USA 91109

Document Information

DOCUMENT CREATION DATE

12 April 2006

No technical references available for this data set.
No FAQs or How Tos available for this data set.

Access complete Knowledge Base

Questions? Please contact:
NSIDC User Services
Phone: 1 303 492-6199
Email: nsidc@nsidc.org