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SGP97 Electronically Scanned Thinned Array Radiometer Quick Look Images

dataset
posted on 2023-11-30, 08:42 authored by Thomas Jackson

The core of the 1997 experiment involves the deployment of the L-band Electronically Scanned Thinned Array Radiometer (ESTAR) for daily mapping of surface soil moisture over an area greater than 10,000 km2 and a period on the order of a month. The region selected for investigation is the best instrumented site for surface soil moisture, hydrology and meteorology in the world. This includes the USDA/ARS Little Washita Watershed, the USDA/ARS facility at El Reno, Oklahoma, the ARM/CART central facility, as well as the Oklahoma Mesonet. The region covered by the experiment is 34.5 to 37 North latitude and 97 to 99 West longitude. The aircraft mapping took place over the period 18 June to 18 July 1997. This dataset presents brightness temperature images from the Electronically Scanned Thinned Array Radiometer (L band passive microwave radiometer).


Resources in this dataset:

Funding

Agricultural Research Service

National Science Foundation

History

Data contact name

Jackson, Thomas

Data contact email

Tom.Jackson@ars.usda.gov

Publisher

National Center for Atmospheric Research / Earth Observing Laboratory

Intended use

SGP97 is set in a subhumid environment during early summer. Within this setting, the objectives of SGP97 are (1) to establish that the retrieval algorithms for surface soil moisture developed at higher spatial resolution using truck- and aircraft-based sensors can be extended to the coarser resolutions expected from satellite platforms; (2) to verify spatial-temporal estimators of soil moisture and to examine the utility of pedotransfer function in hydrologic modeling; (3) to examine the feasibility of inferring soil moisture and temperature profiles using surface observations in conjunction with in situ measurements, and (4) to examine the effect of soil moisture on the evolution of the atmospheric boundary layer and clouds over the Southern Great Plains during the warm season.

Use limitations

These are quick look products and use previous calibrations, have no corrections for beam position and utilize only first order geometric and geolocation. In addition, there is a significant radio frequency interference (RFI) problem located in the lower portion of the image. This is associated with radar sources in Oklahoma City. Additional east-west coverage was obtained that eliminated this problem, however, these additional lines could not be included in the quick look.

Temporal Extent Start Date

1997-06-18

Temporal Extent End Date

1997-07-18

Theme

  • Not specified

Geographic Coverage

{"type":"FeatureCollection","features":[{"geometry":{"type":"Polygon","coordinates":[[[-99,37],[-97,37],[-97,34.5],[-99,34.5],[-99,37]]]},"type":"Feature","properties":{}}]}

ISO Topic Category

  • environment
  • farming

Ag Data Commons Group

  • Southern Plains
  • Long-Term Agroecosystem Research

National Agricultural Library Thesaurus terms

image analysis; soil water; meteorology; USDA; watersheds; Oklahoma; latitude; longitude; aircraft; data collection; temperature; microwave radiometers

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

Jackson, Thomas (2020). SGP97 Electronically Scanned Thinned Array Radiometer Quick Look Images. National Center for Atmospheric Research / Earth Observing Laboratory.

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    Categories

    Keywords

    Environmentfarmingbrightness temperatureSoilmicrowave imagerydata.govARS

    Licence

    CC BY 4.0

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