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Code Listing by Darin Koblick

Code 1-10 of 12   Pages: Go to  1  2  Next >>  page  






Convert a specified Julian Date Vector to Greenwich Mean Sidereal Time (GMST). The expected input matrix may contain multiple dimensions. The output matrix will be in the same size as the input matrix. Warning: Use caution when using GMST as a substitute for Greenwich Apparent Sidereal Time (GAST).

To run JD2GMST, use the following code sequence:
GMST = JD2GMST(JD);

Where:
JD is the Julian Date input (days)



This algorithm will accept a Latitude, Longitude and Altitude location as well as a specific universal coordinated time. It will use this information and calculate the position of the moon in a local coordinate frame (az and alt aka az and el).




SAT (Solar Apparent Time YYYY/MM/DD hh:mm:ss) [N x 19] char
SMT (Solar Mean Time YYYY/MM/DD hh:mm:ss) [N x 19] char



This is a GUI that I had developed to find the palindrome of any number. The underlying algorithm will take any positive 2+ digit number, reverse the sequence, and add the reversed sequence onto the original number.

Example:
196...



Compute the equation of time with accuracy on the order of seconds. This routine can handle multiple millenniums.

Function Call With Time String:
>> EQtime = EquationOfTime('2000/01/01 00:00:00');

Function Call...



Predict the azimuth and elevation of the Sun within +/- 1 degree at any geodetic latitude, longitude and altitude.

Function Call: [Az El] = SolarAzEl('2008/02/18 13:10:00',60,15,0)

Input List:
UTC Date and Time - Use...




RaDec2AzEl will take the Right Ascension and Declination in the topocentric reference frame, site latitude and longitude as well as a time in GMT and output the Azimuth and Elevation in the local horizon reference frame.

List of...



Convert a specified Julian Date Vector to Greenwich Apparent Sidereal Time (GAST). The expected input matrix may contain multiple dimensions. The output matrix will be in the same size as the input matrix. Warning: Use caution when using GAST as a...



Convert WGS 84 (CTS, ECEF) Coordinates to ECI (CIS, Epoch J2000.0) Coordinates. This function has been vectorized for speed. The associated error in converting between coordinate frames is on the order of 1.2*10^-11 km when compared to STK...




The bulirsch-Stoer single-step ODE propagator has come to MATLAB in form of a MEX adaptation of Juergen Dietel's Numerical ODE solver. This may very well be the fastest single-step numerical propagator released on the Mathworks...