Data Set ID: 
NSIDC-0148

CLPX-Satellite: EO-1 Hyperion Surface Reflectance, Snow-Covered Area, and Grain Size, Version 1

This data set consists of apparent surface reflectance, subpixel snow-covered area, and grain size collected from the Hyperion hyperspectral imager. The Hyperion imager has a spectral range of 400-2500 nm, a spectral resolution of 10 nm, spatial resolution of 30 m, and a swath width of 7.8 km. Sampling is scene based (256 samples, 512 lines).

This is the most recent version of these data.

BASIC Level of Service

Data: Data integrity verified

Documentation: Key metadata and links to supporting documentation available

User Support: Assistance with data access and basic data usage

See All Level of Service Details

Parameter(s):
  • SURFACE RADIATIVE PROPERTIES > REFLECTANCE
  • SNOW/ICE > SNOW COVER
  • GLACIERS/ICE SHEETS > FIRN > SNOW GRAIN SIZE
Data Format(s):
  • Binary
Spatial Coverage:
N: 40.3, 
S: 39.6, 
E: -105.7, 
W: -106
Platform(s):EO-1
Spatial Resolution:Not SpecifiedSensor(s):HYPERION
Temporal Coverage:
  • 19 March 2002
  • 15 February 2002
Version(s):V1
Temporal ResolutionNot specifiedMetadata XML:View Metadata Record
Data Contributor(s):Thomas Painter

Geographic Coverage

Once you have logged in, you will be able to click and download files via a Web browser. There are also options for downloading via a command line or client. For more detailed instructions, please see Options Available for Bulk Downloading Data from HTTPS with Earthdata Login.

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-Satellite: EO-1 Hyperion Surface Reflectance, Snow-Covered Area, and Grain Size, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/J5U800GIBU78. [Date Accessed].

Back to Top

Collapse All / Open All

Detailed Data Description

CAUTIONARY NOTE: These data have not been reviewed for quality. Known issues exist in the processing of these data. Until this disclaimer has been removed, users should send questions and comments about this data set to nsidc@nsidc.org. NSIDC will forward these inquiries to the PI for resolution.

Hyperion data have the following characteristics:

  • Spectral range: 400-2500 nm
  • Spectral resolution: 10 nm
  • Spatial resolution: 30 m
  • Swath width: 7.8 km
  • Processing level: apparent surface reflectance, subpixel snow-covered area and grain size
  • Sampling: scene based (256 samples, 512 lines)
  • Temporal coverage: 15 February 2002 and 19 March 2002
  • Spatial coverage: 39.60N, 106.00W to 40.30N, 105.70W
Format

Apparent surface reflectance: binary, short integer
Subpixel snow-covered area: binary, floating point (data range ν [0,1])
Subpixel snow grain radius: binary, floating point (data range ν [0, 1100 micrometers])

Background color on
File and Directory Structure

The data consist of fourteen binary ENVI files in a single directory. Seven files each for the two dates that measurements were taken.

Background color on
File Naming Convention

The following codes are used in the seven diferent files:

  • All file names begin with the date of collection of the form yyyymmdd.
  • Reflectance files have an ".out" extension and their header files have an ".out.hdr" extension.
  • Band-interleaved files have a .bip extension.
  • Snow-cover area files include "snow" in the file name.
  • Snow grain files include "grnsz" in the file name.
  • Rock-cover area files include "rock" in the file name.
  • Vegitation-cover area files include "veg" in the file name.
Background color on
File Size

Apparent surface reflectance: 608 Mb
Products (snow covered area, grain size): 6 Mb

Background color on
Volume

Total data set volume is 724 MB.

Background color on
Spatial Coverage

Southernmost Latitude: 39.60 N 
Northernmost Latitude: 40.30 N 
Westernmost Longitude: 106.00 W 
Easternmost Longitude: 105.70 W

Spatial Resolution

Spatial resolution is 30 m.

Background color on
Temporal Coverage

Hyperion measurements were made on 15 February 2002 and 19 March 2002.

Background color on
Parameter or Variable

Parameter Description

Hyperion measures 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

Software and Tools

Background color on

Data Acquisition and Processing

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

Background color on

References and Related Publications

Contacts and Acknowledgments

Thomas H. Painter
CIRES/National Snow and Ice Data Center
University of Colorado
Boulder, CO 80309-0216

Document Information

DOCUMENT CREATION DATE

13 April 2006

No technical references available for this data set.

How To

V0 Programmatic Data Access Guide
Data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) can be accessed directly from our HTTPS file system. We provide basic command line Wget and curl instructions for HTTPS file system downloads below. For questions about programmatic access to NSIDC... read more