Recent content by thor36

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    Calculate time (or fraction of orb. period) of sat. in umbra

    Thank you BobG, I believe this will do!
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    Calculate time (or fraction of orb. period) of sat. in umbra

    Greetings! I would like to know how to calculate the time, or fraction of orbital period, that a satellite spends in umbra? (total solar eclipse for satellite when they aren't affected by Solar radiation pressure and solar panels don't generate power). Information given would be satellite's...
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    Difference between orbital mechanics and astrodynamics ?

    That's right, and Wikipedia is not the only source that says there is no difference. But to quote Vallado ( Fundamentals of Astrodynamics and Applications ), which quotes "Space Vehicle Design" : "Astrodynamics is the study of the motion of man-made objects in space, subject to both natural and...
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    Difference between orbital mechanics and astrodynamics ?

    Hello all. The title of this thread sums up my question - what is the difference between orbital mechanics and astrodynamics ? Or is there a difference at all ? I have sometimes seen different uses of the terms, for example, on many sites I see " astrodynamics or orbital mechanics is ... " ...
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    Results from TLE & SGP4 propagation - don't seem right & with interpretation

    After doing more "experiments", it seems that the particular TLE I used was erroneous. This was my first testing of SGP4, and many things could be wrong with the code itself, so obviously, the TLE I got from online source wasn't the first thing I blamed for the errors. It seems that even...
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    C/C++ How to write C++ code using SGP4 to propagate satellite position

    Thank you for reply ! My question is very very specific, so I knew posting it is quite a long shot. I have found a partial answer - the code distribution contains a "testcpp.cpp" file which provides a case of implementation. Using it is fine for start, but being a test example it has...
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    Results from TLE & SGP4 propagation - don't seem right & with interpretation

    Greetings all ! I have this problem with SGP4 propagation, that I hope someone can help me out with. I acquired a TLE of the ISS from internet and used the C++ SGP4 propagator to compute future position and velocity vectors of the Station. I am unsure about some aspects of results though and...
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    C/C++ How to write C++ code using SGP4 to propagate satellite position

    Greetings all ! I really hope this is the right sub-forum for my question, I have chosen it because I've seen TLE being mentioned a couple of times around here. I have done some reading on astrodynamics and orbital mechanics, but I am relatively new to coding. I would like to write some C++...
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    C/C++ Looking for Runge-Kutta 8th order in C/C++

    Thank you for the answer. My question was more application oriented though, trying to find already written software. Nonetheless, I have found a library which includes a Runge-Kutta-Fehlberg(78) method. Can anyone explain me the main differences if I would be using the "RKF78" instead of...
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    C/C++ Looking for Runge-Kutta 8th order in C/C++

    Greetings all ! This is my first post on the forum, so please kindly let me know if I am not asking a proper question or on a proper board. I would like to use Runge-Kutta 8th order method (89) in a celestial mechanics / astrodynamics application, written in C++. Therefore I wonder if...
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