SDHS meteorological products are created at Forecaster Consoles
which include an alphanumeric monitor, three image graphics
monitors, a keyboard, and a digitizing tablet with a stylus and
puck. Forecasters use interactive menus to build products and can
create custom menus for specific forecasting tasks. Forecasters
generate weather products on SDHS using a "toolbox" of data and
display control functions and arithmetic capabilities.
The SDHS is a multiprocessor system connected by the Internal Distribution Subsystem local area network. Control of the SDHS hardware and software is provided by the Master Support Processing Subsystem.
The SDHS Automated Weather Distribution System Product Driver Subsystem automatically generates and disseminates weather products to civilian and military agencies. The SDHS exchanges weather products with the National Weather Service through the Shared Processing Network, and interfaces to the Automated Weather Network and the Automated Digital Network.
The Ingest Subsystem accepts DMSP, TIROS, and GOES raw satellite data from Site III and stores it in the Raw Satellite Data Base.
Severe weather forecasters quickly analyze severe weather
reports and issue bulletins as needed. Military Weather Advisory
forecasts are created that identify areas where severe weather is
expected. Forecasters monitor weather conditions for over 500
locations and issue DOD Point Warning forecasts when special weather
conditions exist. Plain language severe weather reports are
received via teletype and entered into the SDHS. Reports
identifying extreme weather conditions, such as tornado touchdown,
are quickly forwarded by the SDHS to the CDB processors for
The Forecaster Console Subsystem has many specialized functions for interaction with satellite imagery and conventional weather data. Arithmetic and display operations can be performed on conventional data with the results overlaid on raw satellite
imagery such as DMSP or on SGDB imagery. Arithmetic operations provide access to over 50 specialized meteorological processing functions including Skew-T, Log P, gridded data analysis, gridded field derivation, and flight plan processing. Raw satellite image data received by the Ingest Subsystem is corrected to produce a constant pixel resolution along each scan line and is then earth-located such that graphics can be accurately overlaid on the raw satellite images. SGDB satellite image data is generated by the CDB computers from DMSP OLS data and is earth-located in a polar stereographical projection, and mercator projection.
Graphics can be overlaid on raw DMSP satellite data such as this visual image of the Great Lakes (left), and this night time infrared image showing Texas and the Gulf of Mexico (center). Graphics can also be overlaid on SGDB data such as this northern hemisphere projection (right).
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