Data Set ID: 
SV19MA_VOD

SMAPVEX19-21 Massachusetts Vegetation Optical Depth, Version 1

As part of the SMAPVEX19-21 campaign, an L-band radiometer was deployed on top of a tower at Harvard Forest,Massachusetts, looking down at a stand of red oak forest. The radiometer collected data in V-polarization from late April to mid October 2019. Over 4 days in early July 2019, the water potential and L-band complex dielectric constant of canopy leaves were measured at various times of day. Other instruments were installed within the radiometer's field of view to measure soil moisture and temperature, air temperature, tree xylem apparent dielectric permittivity at 70 MHz, tree xylem water potential, and canopy wetness. The goal of this experiment was to study the sensitivity of L-band vegetation optical depth (VOD) to changing vegetation water potential over a growing season.

This is the most recent version of these data.

Version Summary: 

Initial release.

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Data: Data integrity and usability verified

Documentation: Key metadata and user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools

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Parameter(s):
  • ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE
  • MICROWAVE > BRIGHTNESS TEMPERATURE
  • SOILS > SOIL TEMPERATURE
  • SOILS > SOIL MOISTURE/WATER CONTENT > SURFACE SOIL MOISTURE
  • VEGETATION > VEGETATION OPTICAL DEPTH (VOD)
  • VEGETATION > VEGETATION WATER POTENTIAL
  • VEGETATION > PLANT CHARACTERISTICS > XYLEM DIELECTRIC PERMITTIVITY
Data Format(s):
  • CSV
Spatial Coverage:
N: 42.54, 
S: 42.54, 
E: -72.17, 
W: -72.17
Platform(s):GROUND-BASED OBSERVATIONS
Spatial Resolution:Not applicableSensor(s):DIELECTRIC PROBE, HUMIDITY SENSORS, PRESSURE SENSORS, RADIOMETERS, SOIL MOISTURE PROBE, SOIL TEMPERATURE PROBE, THERMOMETERS
Temporal Coverage:
  • 28 April 2019 to 17 October 2019
Version(s):V1
Temporal Resolution1 hourMetadata XML:View Metadata Record
Data Contributor(s):Holtzman, N., A. G. Konings, A. Roy, M. Cosh, and A. Colliander.

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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.

Holtzman, N., A. G. Konings, A. Roy, M. Cosh, and A. Colliander. 2020. SMAPVEX19-21 Massachusetts Vegetation Optical Depth, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/2PZJDURUJLWF. [Date Accessed].

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