Project Space Shuttle Vessel

[Tim13]

The title at the top says it all: it displays the Ku-Band antenna rates (in the EL/AZ coordinates), as it tracks a target, so you can tell which direction the target is going.
It shakes too much currently, but it is still usable. An improvement is on the todo list.

So it's called the line of site rates display....didn't think it would be that easy coming from a government agency.

So how is it used? Do you put the DAP in lvlh alt modes then use rcs translation? Assuming top and bottom is prograde and retrograde, or is that the z axis?

 

[GLS]

So it's called the line of site rates display....didn't think it would be that easy coming from a government agency.

So how is it used? Do you put the DAP in lvlh alt modes then use rcs translation? Assuming top and bottom is prograde and retrograde, or is that the z axis?

This is the EL/AZ coordinate system, so looking at that display is like looking up thru the overhead windows.


E.g., if the AZ needle is to the left, it means the target is moving towards the left, not where it is, but just the direction of relative motion.

As for usage... I'm not sure it had much use. AFAIK, it is the only way to find out where the target is moving towards while approaching during the night, but the system is so good that this probably used just to confirm that the rates are low, i.e., the relative motion is mostly radial.

 

[Tim13]

I need some tips. Help me save myself from pulling up the default docking MFD and cheating.

I get to the MC4 burn, and all is well. Testing out the results of the burn and just monitoring to see what happens, I'll end up around 500 feet below the ISS, and less than 1.0 on the R based on the values shown in SPEC 33. Then of course, I start diverging, try to correct, and things go south from there.

I'm struggling with the visual portion. Station keeping at this point is eluding me. Visually fine tuning my orbit to be in the same orbit as the ISS is a mystery right now.

Any advice is welcome, no matter how obvious it may seem to you, it may turn on the light switch for me.

 

[GLS]

I need some tips. Help me save myself from pulling up the default docking MFD and cheating.

I get to the MC4 burn, and all is well. Testing out the results of the burn and just monitoring to see what happens, I'll end up around 500 feet below the ISS, and less than 1.0 on the R based on the values shown in SPEC 33. Then of course, I start diverging, try to correct, and things go south from there.

I'm struggling with the visual portion. Station keeping at this point is eluding me. Visually fine tuning my orbit to be in the same orbit as the ISS is a mystery right now.

Any advice is welcome, no matter how obvious it may seem to you, it may turn on the light switch for me.

I think the Rendezvous checklist has a page or 2 with the procedures following MC-4: RPM, TORVA, etc.
Not having anyone else to help, I find it easier to bypass the UNIV PTR display and put the DAP in B, LVLH, VERN, and translation PULSE, and that keeps the attitude in relation to the ISS (which should be in LVLH) and gives fine translational control (0.1fps, I think). For now focus on the basics and bypass the RPM and proceed to the TORVA.
Put the centerline camera view in one TV, which is visible from the aft pilot station. Take your time, it isn't supposed to be like the Apollo 13 movie, with thrusters firing all over the place, the trajectory is designed to have the orbital mechanics help and to save prop. When you get to the V-bar, go full zoom in on the centerline camera, to see the target and got a decent alignment for far out, and then bring it in (don't forget to power the APDS).