ENGINEERING ANALYSIS INC. 
SATT SOFTWARE

SUMMARY

SATT 3.0 is the most current version of the software as described elsewhere.

Previously, the Site Assessment of Tornado Threat, Second Edition, (SATT 2.0) software provided the user with a means of quickly and accurately displaying and analyzing tornado data for any portion of the United States, excluding Alaska. The program contained all National Weather Service (NWS) data from 1950 to 1999. By means of this software we calculated and tabulated the probability of tornadoes for the twenty most tornado prone states (excluding Alaska) on both an annual and a month-by-month basis and also for the twenty most tornado prone cities on both an annual and a month-by-month basis. We also developed color-coded contour maps of tornado probability for Alabama and Georgia, as well as a color-coded map of tornado probability for the United States. A number of technical papers were published dealing with our work in this area.  In 1999 SATT 2.0 was licensed to VorTek, LLC.

Three versions of the SATT 2.0 software were previously available:
 
 

In each version of SATT 2.0 the user could obtain an analysis of all tornadoes passing within a specified radius of any given location, within the state(s) included in that particular version. The analysis provided both tabular and graphical output and includes a tabulation of tornadoes by year, month, time of day, and intensity. The annual coverage fraction (ACF), which is the average annual fraction of land area covered by tornadoes within the reference area, was included. A plot of tornado tracks, color-coded by intensity, with state boundaries indicated, was presented along with the most frequent direction from which tornadoes have approached the region of interest.

The user could restrict the analysis to any combination of times of day, months, years, and intensities. For example, the user could set up the program to satisfy the question: "How many tornadoes of intensity four or five passed within 20 miles of Little Rock, Arkansas, between 6:00 and 8:00 p.m., for the months of June and July, during the years 1980 to 1989?" By means of the user-friendly SATT 2.0 software, the user could quickly obtain both an accurate tabulation and a clear display of the characteristics of all tornadoes which have passed through a specified region.

SYSTEM REQUIREMENTS

To ensure the widest possible utilization of the software, the hardware requirements were kept to a minimum, as follows:
 
 

SATT 2.0 supported both printer and plotter output, and was compatible with Windows 95.

INPUTS

The user specified the case by entering the following about the location in question:

The user then had the option to restrict the program's analysis to any combination of: OUTPUTS

All versions of SATT 2.0 were capable of providing both tabular and graphical outputs as follows:
 
 

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