SGP97 Electronically Scanned Thinned Array Radiometer Quick Look Images

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).

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Source: Geodata Harvest

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Field	Value
Tags	Environment farming brightness temperature Soil microwave imagery
Modified	2021-12-30
Release Date	1997-07-13
Identifier	SGP97estar_2015-04-23_0916
Spatial / Geographical Coverage Area	POLYGON ((-99 37, -97 37, -97 34.5, -99 34.5))
Publisher	National Center for Atmospheric Research / Earth Observing Laboratory
Temporal Coverage	June 18, 1997 to July 18, 1997
License	Creative Commons Attribution
Contact Name	Jackson, Thomas
Contact Email	Tom.Jackson@ars.usda.gov
Public Access Level	Public
Program Code	005:040 - Department of Agriculture - National Research
Bureau Code	005:18 - Agricultural Research Service
Source ID	SGP97estar_2015-04-23_0916

Harvested from Geodata Harvest
Harvest Source Title	Geodata Harvest
Harvest Source URI	https://geodata.nal.usda.gov/geonetwork/srv/eng/csw
Last Harvest Performed	Thu, 04/22/2021 - 01:01

Extended Metadata:

Field	Value
Authors	Jackson, Thomas
Peer Reviewed	No
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.
Funding Sources	Agricultural Research Service National Science Foundation
Product Type	Dataset

Field	Value
ISO Topic(s)	environment farming
State or Territory	Oklahoma
National Agricultural Library Thesaurus Term	image analysis soil water meteorology USDA watersheds Oklahoma latitude longitude aircraft data collection temperature microwave radiometers
Ag Data Commons Keywords	Agroecosystems & Environment Agroecosystems & Environment Geography Agroecosystems & Environment Geography Remote sensing Agroecosystems & Environment Soil
Program	Long-Term Agroecosystem Research - LTAR Southern Plains

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