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Atmospheric Analysis Programs The TESS Atmospheric Analysis section is composed of four programs: Observation Plot, Weather Analysis Warnings Plot, and Local Observation Entry and Archival. The Observation Plot (OBSPLOT) program allows the operator to plot selected atmospheric parameters, one at a time, for a given atmospheric isobaric level, date, time, and geographic area. This function accesses the TMM decode utilities to extract parameters of interest from the coded observations. Observations are spatially thinned during plotting in order to prevent overwriting. The Weather Analysis program provides the forecaster with an interactive operational system for numerical analysis of meteorological fields. The analysis scheme performs several interactive scans to fit irregularly spaced observation data to an initial first-guess field, so that representative values may be obtained anywhere within the analysis region. The analysis takes the form of an ordered array of grid point values and is available for display and storage. The display consists of a contoured objective analysis of the desired field (pressure, geopotential height, wind, etc.) at an operator-specified date, time, level, and geographic region. The Warnings Plot program provides the capability to enter and display tropical cyclones, high-wind and high-seas warning message data. The Tropical Cyclone program provides the capability to display storm track forecasts, to compare storm track forecasts, and to verify storm forecasts. With the exception of the Storm on an operator-selected map background. Additionally, outputs are routed to the briefing support data files for later recall and use. The Local Observation Entry and Archival (LOEA) program provides the capability to enter, edit, and archive local surface weather observa-tions display surface weather observations on a standard surface weather observation form, as an airways coded message, or in a synoptic code message format; archive and retrieve radiosonde data sets and refractivity data sets; and to convert relative wind speed and direction to true wind. Meteorological Programs The TESS Meteorological programs section is composed of Radiosonde Initial Analysis, D-Values, Sound Focus, Ballistic Winds and Densities, Radiological Fallout, Aircraft Icing Ship Ice Accretion, and Tomahawk Environmen-tal Support. The Radiosonde Initial Analysis (RIA) program is used to enter upper-air data into TESS and to compute profiles of wind and thermo-dynamic data for use by the Electromagneti Propagation program and other meteorological programs. This program receives inputs in th form of raw ordinate values profiles, profiles of pressure, temperature, and humidity, or encode upper-air messages. Outputs consist of profile of pressure, temperature, dew point temperature, relative humidity, geopotential height, win speed, wind direction, and modified refractivity (M-units). The program also computes the Lifting Condensation Level (LCL), Convective Conden-sation Level (CCL), Level of Free Convectio (LFC), Freezing Level, Showalter Stability I (SSI), and contrail formation data. Encode messages are provided when the inputs are in th form of raw ordinate values. Skew T, Log P Diagrams are produced upon request. The D-Value program is used to compute profiles of D-Values, which are used in setting pressure-bomb detonation altitudes and other applications. The Sound Focus (SOCUS) program forecasts sound propagation in the atmosphere. Sound focus forecasts allow Fleet personnel to determine if atmospheric conditions favor large-scale refrac-tion of sound toward populated areas during naval gunfire, bombing, and explosives exercises. The Ballistic Winds and Densities (METBAL) program computes and outputs ballistic wind and density correction factors. These factors are used to obtain first-shot-on-target delivery of naval gunfire rounds. The Radiological Fallout (RADFO) model forecasts patterns of radiological fallout, which are used to determine ship and unit maneuvers in the event of a nuclear burst. The Aircraft Icing (AIR ICE) program deter-mines icing levels, probabilities, and intensities used in pilot briefings and electrooptic sensor/ weapon systems employment planning. The Ship Ice Accretion (SHIP ICE) program provides estimates of ship ice accretion rates. Ice accretion from sea spray on a ships superstructure can impair the operational capability and safety of the ship. The Tomahawk Environmental Support program provides the capability to compute en-vironmental inputs necessary for Tomahawk employment. Program inputs are supplemented with Tomahawk Environmental Support Product (TESP) messages received from the Fleet Numerical Oceanography Center. |
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