Rendezvous - How To?

[spartanhoplite15]

Hi everyone,


How could I rendezvous to the ISS using the SPEC 34 display?
I type in ITEM 28 EXEC to calculate the burn solution, are there any other steps to take?
I have taken a look on SCOM and FDF but still can't understand how to do it.

Thanks for any help.

 

[SiameseCat]

Rendezvous targeting is not fully implemented yet. The SPEC 34 display works, but the scenario file has to be edited to specify the target vessel. In real life, Mission Control updates state vectors for the target object, and the shuttle uses its own sensors (star trackers and rendezvous radar) to track the target. At the moment, SSU just gets state vectors from Orbitersim for a vessel specified in the scenario file.

The Rendezvous test scenario (in Space Shuttle Ultra/Testing Scenarios) is set up so the shuttle can rendezvous with the ISS. You should be able to use the rendezvous checklists as a guide for computing the rendezvous burns.

 

[STS]

The vessel is specified in Scenario with a ID. But where does that ID come from?

Thank you.

 

[Urwumpe]

The vessel is specified in Scenario with a ID. But where does that ID come from?

Thank you.

Its the name of the vessel in Orbiter.

 

[DaveS]

i cant seem to find the Space Shuttle Ultras rendezvous checklist

That's because there isn't one. You have to use one of the actual shuttle Rendezvous Flight Data Files (FDF).

 

[STS]

Hello

At the SPEC 34 ORBIT TGT display, I don´t understand what Base time (Item 21) means.

Also, I am unsure of when this display is used.

And can you confirm that T2 computations are not yet implemented? I am also unsure what T1 and T2 means.

Thank you.

 

[SiameseCat]

You should take a look at the shuttle rendezvous checklists and the Data Processing System Dictionary to see how the SPEC 34 displays are used. They can be downloaded from http://www.nasa.gov/centers/johnson/news/flightdatafiles/index.html.

The SPEC 34 display is used to target rendezvous burns (specifically, the NCC, TI, MC1, MC2, MC3, MC4 burns). The T1 burn will set up a rendezvous with the target object (at the moment, defined in the scenario file). The T1 burn is calculated so that the shuttle will reach the position of the target object (with an offset specified by ITEMs 18-20) at the T2 TIG. In theory, the T2 burn will null relative rates between the shuttle and the target object. The T2 calculations are not used in real life and have not been implemented in SSU yet.

The BASE TIME value is not used in SSU at the moment. In real life, it is possible to load all the burn targeting information using a single ITEM input; this loads the T1 and T2 TIGs as offsets from the base time. This is not simulated in SSU yet.

 

[Becker]

Hello all. My specific problem is entering the data for the burn not from want of reading the checklists, flight data files and the dictionary, am at a total dead end. Watching a video the guy is using SSU and he seems to call up an 'orbiter' input box to enter values whilst in the virtual cockpit.

I've tried various key combinations for MFD control to get to grips with controlling the CRT but am failing miserably. Is it a key press i'm missing that opens an input box?