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Yes, SpaceX puts a lot more effort into the webcasts. I don't know if their telemetry is live or precomputed (though it is likely live, see below) - but the fac
by mikejb 8y ago
Yes, SpaceX puts a lot more effort into the webcasts. I don't know if their telemetry is live or precomputed (though it is likely live, see below) - but the fact that they show live feed of the rocket rather than a simulation (except for Stage 2 coasting periods where they render the spacecrafts' orbit) already gives the entire display a different feel. (At this point it's also important to note that this live feed got them into trouble once [1]).
I also agree with your sentiment that the movie removes a bit of the scientific aspect.
Insert here a good 30 minutes spent on watching launch footage and writing down numbers
Ok, at this point I'm deep in looking at launch footage, and I'm more disappointed by the Soyuz launch footage. Whilst it's possible that they followed the exact same launch trajectory (on paper and reality), it's unlikely: MS-08 [2] and MS-09 [3] had the exact same speed, altitude and downrange distance throughout the time telemetry was visible. In contrast, SpaceX showed very different telemetry during launches to the ISS ([4], [5], [6]). Also, it doesn't seem pre-computed: The telemetry during the CRS-7 webcast [7] at least doesn't just continue when the rocket explodes, indicating that it doesn't just display pre-computed numbers.
In Soyuz' defense: They probably have a different (older?) system to get telemetry, and it might bear additional challenges to feed them into a publicly accessible live-stream.
[1] https://www.space.com/40153-spacex-launch-video-noaa-restrictions.html https://www.space.com/40153-spacex-launch-video-noaa-restric...
[2] https://youtu.be/iDebCdDHHpg?t=365 https://youtu.be/iDebCdDHHpg?t=365
[3] https://youtu.be/00uftjSjcnk?t=364 https://youtu.be/00uftjSjcnk?t=364
[4] https://youtu.be/C_Gmgj3N_Z0?t=1270 https://youtu.be/C_Gmgj3N_Z0?t=1270
[5] https://youtu.be/FCCyVCvN2bo?t=1179 https://youtu.be/FCCyVCvN2bo?t=1179
[6] https://youtu.be/rUDLxFUMC9c?t=1036 https://youtu.be/rUDLxFUMC9c?t=1036
[7] https://youtu.be/JYFLoTgO-xQ?t=1286 https://youtu.be/JYFLoTgO-xQ?t=1286
- orbital-decay 8y ago> They probably have a different (older?) system to get telemetry, and it might bear additional challenges to feed them into a publicly accessible live-stream. That is correct. Proton-M launches, on the other hand, had a live stream with probably the most detailed telemetry ever. That particular stream wasn't public, but was available to anyone on request.
- regnerba 8y agoIs there a recording available somewhere or an image of how it looked?
- orbital-decay 8y agoHere's a screenshot of their lowres public telemetry stream dated back to 2009 (Eutelsat W7, if I remember correctly). [0] Unfortunately I don't have any screenshots or recordings of the by-request one, but it had tons of info, down to the bus voltages. The L2 section of nasaspaceflight.com might have something available, but I'm not sure. They seem to have closed it somewhere around 2014 or 2015, possibly to avoid bad publicity or speculations. [0] https://i.imgur.com/2pzbGNV.jpg https://i.imgur.com/2pzbGNV.jpg
- regnerba 8y agoThanks for the link and info. Will d some more looking later this evening.