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CLPX-Ground: Ground-Based Frequency Modulated Continuous Wave (FMCW) Radar

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Identification Information:

Dataset Identifier:

NSIDC-0164

Citation:

Citation Information:

Originator: Marshall, H., G. Koh, and R. Forster.
Publication Date: 20041122
Title: CLPX-Ground: Ground-Based Frequency Modulated Continuous Wave (FMCW) Radar
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/nsidc-0164.html

Description:

Abstract:

This data set is comprised of FMCW radar measurements, which are sensitive to electromagnetic discontinuities in the snowpack, made during the 2002 and 2003 Cold Land Processes Field Experiment (CLPX). The microwave interaction with a snow pack was measured using broadband frequency modulated continuous wave (FMCW) radar operating at between 2 and 18 GHz, incorporating the following frequencies: C-Band (2-6 GHz), X-Band (8-12 GHz), and Ku-Band (14-18 GHz). Measurements were made at the Local Scale Observation Site (LSOS) near Fraser, Colorado, during Intensive Observation Periods (IOP) 1 and 2 (February and March, 2002), and at four different sites covering each of the three Mesocell Study Areas (MSAs) during IOP 3 and 4 (February and March, 2003). Active microwave radar signals are reflected and scattered by electromagnetic discontinuities that affect radar backscatter signatures. The location and magnitude of these discontinuities in a snow pack must be identified as a function of microwave frequency in order to accurately invert snow cover properties from active and passive microwave remote sensing systems. Consequently, in conjunction with the radar measurements, detailed snow pit measurements were taken at a nearby site in order to correlate the radar profile with the snow pit records.

This investigation found that radar operating at 14-18 GHz contains the most information about the internal features of a dry snow pack. However, the high-frequency radar is of limited use in wet snow due to the high absorption loss in water. For a wet snowpack, radar operating at lower frequencies (2-6 GHz) was necessary for penetrating to the snow-ground interface. These findings suggest that a dual-frequency approach for radar remote sensing may be necessary to retrieve snow pack parameters such as density, depth, and wetness.

The NASA CLPX is a multi-sensor, multi-scale experiment that focuses on extending a local-scale understanding of water fluxes, storage, and transformations to regional and global scales. Within a framework of nested study areas in the central Rocky Mountains of the western United States, ranging from 1-ha to 160,000 km2, intensive ground, airborne, and spaceborne observations are collected. Data collection focuses on two seasons: mid-winter, when conditions are generally frozen and dry, and early spring, a transitional period when both frozen and thawed, dry and wet conditions are widespread.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Marshall, H., G. Koh, and R. Forster.
Publication Date: 20041122
Title: CLPX-Ground: Ground-Based Frequency Modulated Continuous Wave (FMCW) Radar
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/daac/nsidc0164_clpx_fmcw/

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 20020219
Ending Date: 20030329

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -106.6788°
East Bounding Coordinate: -105.7681°
North Bounding Coordinate: 40.6449°
South Bounding Coordinate: 39.828°

Keywords:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
Theme Keyword: EARTH SCIENCE Cryosphere Snow/Ice Snow Cover
Theme Keyword: EARTH SCIENCE Cryosphere Snow/Ice Snow Depth
Theme Keyword: EARTH SCIENCE Spectral/Engineering Radar Radar Reflectivity
Theme Keyword: EARTH SCIENCE Terrestrial Hydrosphere Snow/Ice Snow Cover
Theme Keyword: EARTH SCIENCE Terrestrial Hydrosphere Snow/Ice Snow Depth

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Project Keywords
Theme Keyword: CLPX Cold Land Processes Field Experiment

Theme:

Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: climatologyMeteorologyAtmosphere

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: continuous wave radar
Theme Keyword: Radar
Theme Keyword: Snow Depth

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent North America
Place Keyword: Continent North America United States Of America Colorado, Wyoming
Place Keyword: Geographic Region Northern Hemisphere

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Hans-Peter Marshall
Contact Organization: University of Colorado, Civil, Environmental and Architectural Engineering

Contact Address:

Address Type: mailing
Address:
  • Campus Box 450
City: Boulder
State or Province: CO
Postal Code: 80309-0422
Country: USA

Contact Voice Telephone: Unknown

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Distribution Information:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: National Snow and Ice Data Center
Contact Person: NSIDC User Services

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Resource Description:

NSIDC-0164

Distribution Liability:

NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: Binary

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ASCII Text (.txt)

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: Joint Photographic Expert Group (JPEG) (.jpg)

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

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Metadata Reference Information:

Metadata Date:

20140311

Metadata Review Date:

20140311

Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Metadata Standard Name:

FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

Metadata Standard Version:

FGDC-STD-012-2002

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Metadata Views

FGDC Text-Only

Federal Geographic Data Committee (FGDC) in plain text

FGDC XML

Federal Geographic Data Committee (FGDC) in Extensible Markup Language (XML)

DIF HTML

NASA Global Change Master Directory (GCMD) Directory Interchange Format (DIF)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata