README FILE Prepared 2009/01/17 by E.D.G. seismic@ix.netcom.com SunGP.exe Version SunGP.exe.1.A.2.2009/01/17 NOTE - SunGP.exe was developed by independent researchers. It is not a commercial computer program and has not had extensive testing for accuracy and reliability. Program users should not rely exclusively on the data that it generates when they are making important decisions. SunGP.exe is a freeware compiled TrueBasic computer program that generates information regarding the latitude and longitude of the Subsolar Point, the Sublunar Point, and the Gravity Point as well as the distance between the Earth and the sun, and the Earth and the moon. The program is designed to run on PC type computers using the Windows Vista, XP, 2000, and NT operating systems. It is presently not known if it will run on other computers or with other operating systems. However, the source code is available in the SunGP.txt file. People can try compiling it with other versions of Basic or with other computers and operating systems. If you draw a line between the centers of the Earth and the moon, the Sublunar Point is the location on the surface of the Earth through which that line passes. The Subsolar Point is a similar location related to a line drawn between the centers of the Earth and the sun. And the Gravity Point is a location on the surface of the Earth where the sun and moon gravities are combined using a ratio of 2.5 for moon gravity strength versus sun gravity strength. The Gravity Point is always fairly close to the location of the Sublunar Point and is intended to be somewhere in the vicinity of the location where the Tide Generating Force is strongest. PROGRAM USAGE - UTC format dates and times are stored in SunGPin.dat. And the file should be saved as an ordinary text file without any special formatting. The dates and times should look like the following with a single space between them: Example: 2008/08/01 10:00:00 yyyy/mm/dd hh:mm:ss yyyy = year mm = month dd = day hh = hour mm = minute ss = second SunGPin.dat, Xnmba420.dll Xnmte420.dll need to be in the same directory as SunGP.exe in order for it to run properly. The program can be started by double clicking on it. If desired, a Windows shortcut link file can be created and used to start SunGP.exe. The shortcut file "Start in" address box should contain the name of the directory where SunGP.exe is running. Other computer programs or batch files can direct it to run. However, they need to make certain that the active run directory is the one where the program is stored. SunGP.exe should run for about a second and then end on its own. It will create the text file SunGPout.dat if it does not already exist and then store the program output data in that file. PROGRAM OUTPUT The following are examples of SunGP.exe input and output using a year 2008 eclipse time where the Subsolar, Sublunar, and Gravity Point longitudes have the same values. SunGPin.dat = 2008/08/01 10:00:00 SunGPout.dat = 2008/08/01 UTC format input date 10:00:00 UTC format input time 17.87 Subsolar point latitude 328.42 Subsolar point longitude 17.73 Sublunar Point latitude 328.42 Sublunar Point longitude 17.77 True Gravity Point latitude 328.42 True Gravity Point longitude 58.42 0 to 89 degree range value for Sublunar Point longitude 58.42 0 to 89 degree range value for Gravity Point longitude .01 Sun - Earth - Moon angle 1.015 Distance between Earth and sun (astronomical units) 367821 Distance between Earth and moon (kilometers) 3.50 Combined sun and moon gravities at the Gravity Point The above “0 to 89” degree range longitude values are needed for one of SunGP.exe's applications. They are generated by subtracting some multiple of 90 degrees from the true Sublunar and Gravity Point longitudes so that the final numbers are in the 0 to 89 degree range.