SSU V1.25 Release

[Pilot7893]

This sounds awesome so far. Can't wait for release!

 

[Urwumpe]

Urwumpe: Do you want to include the Mission Files in this version or wait until the next release?

Don't know if I can get this done ASAP, also it would add a new feature... do we really need this now?

 

[fresh squid]

Sounds like you guys are putting a lot of effort into this. I'm looking forward to the end product. Way to go!

 

[SiameseCat]

Don't know if I can get this done ASAP, also it would add a new feature... do we really need this now?

It's up to you; the main reason I asked was for the payload release code. If we're not going to have the Mission Files, I think the best thing to do would be to use the RMS dialog to attach/release payloads.

 

[Urwumpe]

It's up to you; the main reason I asked was for the payload release code. If we're not going to have the Mission Files, I think the best thing to do would be to use the RMS dialog to attach/release payloads.

I'll take a look at it, but I would recommend having the mission files tested then before we release. Also, the mission files as I intend them to be, would just contain information about the mission, using this information would be up to the GPC software or Payload handling code.

 

[Donamy]

Would it be too much bother to not show the KU antenna, like the STBD MPM's ? STS 1-5 didn't have one.

 

[Urwumpe]

Would it be too much bother to not show the KU antenna, like the STBD MPM's ? STS 1-5 didn't have one.

Possible. The KU Antenna is almost optional.

 

[Donamy]

Would also allow throwing on a quick SC3 KU, so it can gimbal.

 

[Urwumpe]

Would also allow throwing on a quick SC3 KU, so it can gimbal.

It can already gimbal. Just not like inside the real shuttle and thus I did not work much further on it yet.

 

[DaveS]

Maybe then we could implement the appropriate A1 switches?

 

[Urwumpe]

Maybe then we could implement the appropriate A1 switches?

The problem is, that I still have not found the projection from elevation/azimuth to gimbal angles and back. it should be possible to find it, but I have not found it yet.

 

[DaveS]

Here's the pos and axis data for the KU gimbals when deployed:

Alpha gimbal pos: -3.967 2.025 12.248
Alpha gimbal axis: -0.434 -0.381 -0.815
Beta gimbal pos: -4.033 2.001 12.308
Beta gimbal axis: 0.160 -0.939 0.301

 

[Urwumpe]

Here's the pos and axis data for the KU gimbals when deployed:

Ok, will see what I can make of it.

 

[DaveS]

While on the subject of KU band antenna, here's a nice video from STS-118 showing Endeavour's KU antenna gimballing to re-acquire the TDRS:

 

[Urwumpe]

Hmm, moves faster than I expected.

 

[DaveS]

Hmm, moves faster than I expected.

Yes. I believe during the STS-122 rendezvous when the KU system was switched back to COMM mode, the antenna had a hard time getting a lock on a TDRS which caused it to really spiral around aimlessly. So they had to manually point it towards the TDRS for the antenna to lock on.

---------- Post added at 04:10 AM ---------- Previous post was at 03:48 AM ----------

Well, strike that. It was Discovery's KU antenna that went bezerk after the STS-120 RPM and the crew had switched it back to COMM.

 

[Poscik]

Ok. Everything is cool, but what about Re-Entry? AutoFCS brakes too much in atmosphere and speed on Land Site is too much lower than it should be.

 

[Urwumpe]

Ok. Everything is cool, but what about Re-Entry? AutoFCS brakes too much in atmosphere and speed on Land Site is too much lower than it should be.

We planned to give SSU a special reentry treatment after 1.25, as we currently did mostly ascent work.

 

[Poscik]

So, which tool should be used for returning ground in 1.25 release?

 

[Urwumpe]

So, which tool should be used for returning ground in 1.25 release?

GPCMFD works well enough as reference.