Search results

  1. kwan3217

    How to call the native ephemeris for a CelBody

    This means I don't need to use Spice in my BPlane module
  2. kwan3217

    Update XR1 1.10 / XR2 1.5 / XR5 1.8 Versions Released

    OK, consider me suitably chastened. :facepalm:
  3. kwan3217

    Update XR1 1.10 / XR2 1.5 / XR5 1.8 Versions Released

    Is this the right place for bug reports? Anyway, here goes. I am running a scenario with two XR2s, and it seems that they interfere with each other. For instance, I have two sitting on the runway at Canaveral. I am planning on launching one into a safe orbit, then launching the second to...
  4. kwan3217

    Question Music Terminology question

    OK, I've listened to it now. You have a drum cadence for the first 30 seconds, and then a roll-off, but all of it with a piccolo or fife playing on top of it. Your roll-off is a bit longer than I have seen in use. The 20th century fox fanfare starts with a roll-off, from 0:02 to 0:06. Most...
  5. kwan3217

    Question Music Terminology question

    I can't hear the clip you posted, but it sounds like you are describing a "roll-off". I will try to confirm when I get where I can hear it. http://www.onlinedrummajor.com/dictionary.html
  6. kwan3217

    SEP-008, Chapter 8, Pt. 1

    I like it! I have flown an XR5 a lot, but never thought of it in real-world terms like this. OPF4, towed to the runway, Houston still in control (Can't they fly from an airport in Houston?). Very descriptive, keep up the good work.
  7. kwan3217

    Orbiter demotivators

    LAUNCH Don't put anything on a rocket that you are not willing to lose
  8. kwan3217

    Humor Random Comments Thread

    For some reason that reminds me of a joke: can an omnipotent being create a stone so large that it can't lift it? If it can, it's not omnipotent. If it can't, it's not omnipotent.
  9. kwan3217

    Tutorial STS-Discovery Reentry and Landing

    Wow, I'm pleased that people are using my addon, and ashamed that so many people are having trouble with it, especially without me finding out about it. I still need to write that deorbit burn calculator, and read glideslopes from a file as has been requested. Sounds like I need to throw this...
  10. kwan3217

    SEP-008, Chapter 3.

    It sounds like a standard x86 desktop box, the kind you can get from the Dell website. NASA is always ragged on for using 10-20 year old tech instead of the modern stuff, but this story could very well be a morality play about why they do that: radiation hardness.
  11. kwan3217

    Real life, Real time, on-station orbit calculations

    That's what the observers of pulsars thought, too, until one watching the Crab Nebula pulsar glitch. He had this great theory to explain it too, as some kind of impact or something like that, until it glitched again within a couple of years. See here (abstract only). It is thought that all...
  12. kwan3217

    Humor Random Comments Thread

    Luka Luka Luka Luka!
  13. kwan3217

    Real life, Real time, on-station orbit calculations

    Feeling optimistic today, aren't we? Asteroids are an excellent navigation source. The Deep Space 1 spacecraft was almost entirely a set of engineering demonstrations and one of the things demonstrated was Autonav - the spacecraft used its camera to photograph star fields with known asteroids...
  14. kwan3217

    Real life, Real time, on-station orbit calculations

    Even the older spacecraft such as Apollo and Gemini had computers sufficiently powerful to calculate all that stuff on board once they have a state vector. In other words, once the spacecraft had its position and velocity at time X, it was simple to calculate on board all the orbit elements as...
  15. kwan3217

    Real life, Real time, on-station orbit calculations

    Well, the guidance computer in the spacecraft calls VESSEL::GetGlobalPos() and VESSEL::GetGlobalVel()... The real answer is lots and lots of help from the ground, and lots of radar and radio data. That and a mathematical algorithm called the Kalman filter. This is a magical little program that...
  16. kwan3217

    Humor Random Comments Thread

    I recently posted my 100th post, which brings my total lifetime post count almost up to a good hour of posting by Urwumpe.
  17. kwan3217

    Raising ISS altitude?

    Radiation gets a LOT worse as you ascend. The survival time for a person in a spacecraft drops from basically indefinite at ISS altitude to hours up a couple thousand km in the core of the inner belt.
  18. kwan3217

    Humor Random Comments Thread

    Is there any limit on the number of thanks I can give? And where can I cash in the thanks I receive for fabulous prizes?
  19. kwan3217

    E=mc^2, units

    It can be any units, they just have to be consistent. The units of c imply the units used in the equation every time that length or time comes up. The units of m imply the units every time that mass comes up. Therefore, the units of E, which include all three of length, mass, and time, must...
  20. kwan3217

    Flight Question The orbital plane of the moon never intersects Cape Canaveral (afaik)

    If I understand correctly, the original poster plans to boost to LEO from Canaveral, then do a plane change to the Moon's orbit, so that the resulting transfer problem is purely 2D. They want to know when the plane is closest so that the plane change is minimized. When the launch site latitude...
Top