- Joined
- Jun 29, 2010
- Messages
- 647
- Reaction score
- 0
- Points
- 16
I'm trying to create a scenario file based around the timing of the STS-129 mission. The date of the launch is November 16, 2009 and the time of the launch is UTC 19:28:09
I have my scenario set up to start at UTC 19:18:09 ... leaving me exactly 10 minutes to set up my MFD's and prepare for the launch.
I want to be able to rendezvous with the ISS after launching at 19:28:09, so I want to have the ISS cross Cape Canaveral 915 seconds after the scenario starts.
I've worked out the timing with the Atlantis\launch.lua autopilot. If I launch when the Time to Intersection is 315 seconds, then I end up with a RInc that is 0.00 (or very close to it.)
In order to find the right position for the ISS, I loaded up LaunchMFD and fast forwarded time until LaunchMFD reported that the Time to Intersection was 915 seconds. (10 minutes + 315 seconds = 915 seconds)
At that exact moment, I quicksaved the scenario.
That gives me this information for the ISS:
And if I reload that quicksave scenario ... the ISS is in the right place. (It's 915 seconds away from Cape Canaveral.)
The problem is, when I copy that ISS position information to my STS-129 scenario (with the UTC date of 19:18:09 (Date MJD 55151.804271)), the orbital plane of the ISS is not in the right place. Instead of being 915 seconds away from Cape Canaveral, it is crossing Africa.
Why is that?
Here is my STS-129 scenario
http://pastebin.com/p1EG7EYE
I have my scenario set up to start at UTC 19:18:09 ... leaving me exactly 10 minutes to set up my MFD's and prepare for the launch.
I want to be able to rendezvous with the ISS after launching at 19:28:09, so I want to have the ISS cross Cape Canaveral 915 seconds after the scenario starts.
I've worked out the timing with the Atlantis\launch.lua autopilot. If I launch when the Time to Intersection is 315 seconds, then I end up with a RInc that is 0.00 (or very close to it.)
In order to find the right position for the ISS, I loaded up LaunchMFD and fast forwarded time until LaunchMFD reported that the Time to Intersection was 915 seconds. (10 minutes + 315 seconds = 915 seconds)
At that exact moment, I quicksaved the scenario.
That gives me this information for the ISS:
Code:
ISS:ProjectAlpha_ISS
STATUS Orbiting Earth
RPOS 1760803.99 -6351156.01 1422422.06
RVEL -7220.411 -1527.282 2149.421
AROT 144.46 16.43 117.00
VROT 0.07 0.07 -0.13
AFCMODE 7
PRPLEVEL 0:1.000000
IDS 0:1 100 1:2 100 2:3 100 3:4 100 4:5 100
NAVFREQ 0 0
XPDR 466
END
And if I reload that quicksave scenario ... the ISS is in the right place. (It's 915 seconds away from Cape Canaveral.)
The problem is, when I copy that ISS position information to my STS-129 scenario (with the UTC date of 19:18:09 (Date MJD 55151.804271)), the orbital plane of the ISS is not in the right place. Instead of being 915 seconds away from Cape Canaveral, it is crossing Africa.
Why is that?
Here is my STS-129 scenario
http://pastebin.com/p1EG7EYE
Last edited: