Recent content by Orville

BEEP: Thanks for the lead. I'll be sure to check it out. I'm also reviewing the technical note that Martins referenced (Planetary Axis Precession) with the goal of calculating the rotation matrix using the method outlined therein. I calculated the full transformation matrix using the two...

Thank you for the reply. I am not yet proficient in C++ and have thus far only been using Lua to write scripts in Orbiter. Guess I need to "get with the program" :) and learn some C++. In the meantime can you tell me if these planet (and moon I assume) rotation matrices are generated from...

Given a velocity vector in the ecliptic inertial reference frame of a vessel orbiting the Moon (this vector is readily available in Orbiter), what transformation matrix, or series of transformation matrices, would provide the vessel's velocity vector in a reference frame fixed at the Moon's...

I am studying the Script API and for practice am developing a script MFD. In the MFD I'd like to draw certain lines and shapes using colors other than solid bright green which is apparently the default type. However, I cannot figure out how to use the available sketchpad and MFD script commands...

I built a simple antenna and downloaded some software to capture and process signals from US (NOAA) and Russian (METEOR) weather satellites passing overhead. A couple of samples of what I captured are shown below. The METEOR satellite provides about 1 km/pixel resolution. The older NOAA...

Willy Mason - "Restless Fugitive" (audio stream) - YouTube

Hello everyone. Recently retired and finally have enough time to explore all that Orbiter has to offer. Hoping to use it as a springboard to learn more about physics, astrodynamics, computer programming, model development, and much more. Thanks to everyone who had a hand in developing this...

The Lua script ran for me in both Orbiter 2010 and Orbiter 2016. However, with Orbiter 2016 I had to do a manual unpause ('Ctrl+P') to restart the scenario. Curious. Thank you for taking the time to develop this tool. By the way, this is my first post in the Orbiter Forum. Guess I should...