SSU Development thread (4.0 to 5.0) - Page 134 - Orbiter-Forum

GLS · 09-07-2018, 04:00 PM

Quote:

Originally Posted by DaveS

Well, the angle is very minute and documents with graphics have a very hard time showing very minute details such as sub-degree angles. I just drew a line 0.2° line myself in Paint.NET and it is not even detectable. I can ask someone who should definitely know, a retired NASA-KSC Shuttle Mechanical Systems (group callsign MEQ) engineer who worked alot of orbiter/ET mates (and few demates) right up to the very end. He should know if the the orbiter had an angle when mated.

Please ask, as it's much better to hear it from the "horse's mouth" than us here trying to guess.
I'm sure there were some tolerances (like 0.0º +/-0.1º), but the "normal" angle is what we need.

DaveS · 09-07-2018, 10:34 PM

I have sent the message with the question. I'll relay anything worthwhile.

---------- Post added 09-08-18 at 12:34 AM ---------- Previous post was 09-07-18 at 06:05 PM ----------

Can someone verify the math in this post on the NASASpaceflight.com forum by Fequalsma: https://forum.nasaspaceflight.com/in...722#msg1853722

1.1°s sounds a bit much.

GLS · 09-07-2018, 10:45 PM

Quote:

Originally Posted by DaveS

Can someone verify the math in this post on the NASASpaceflight.com forum by Fequalsma: https://forum.nasaspaceflight.com/in...722#msg1853722

1.1°s sounds a bit much.

The math is OK. It assumes we want to calculate the angle between the attachments, which is not what we need...

We need the angle between the axis of the OV and ET.

DaveS · 09-07-2018, 11:12 PM

Quote:

Originally Posted by GLS

The math is OK. It assumes we want to calculate the angle between the attachments, which is not what we need...

We need the angle between the axis of the OV and ET.

Can't that be calculated from the angle between the attachments? They're where they are, that doesn't change. And the orbiter axis doesn't change, it's still level with everything, it's just that the orbiter has a slight positive AoA when mated to the ET. Obviously Enterprise never had any issues with the 6° AoA used for the ALTs.
And the shuttle GNC could easily sense the slight AoA as the reference plane never changed.

GLS · 09-08-2018, 10:40 AM

Quote:

Originally Posted by DaveS

Can't that be calculated from the angle between the attachments?

That assumes that the attachment points in the OV are leveled, which they aren't.

Quote:

Originally Posted by DaveS

And the orbiter axis doesn't change, it's still level with everything, it's just that the orbiter has a slight positive AoA when mated to the ET.

These 2 sentences contradict each other. If the axis are leveled, there is no angle.

Quote:

Originally Posted by DaveS

Obviously Enterprise never had any issues with the 6° AoA used for the ALTs.
And the shuttle GNC could easily sense the slight AoA as the reference plane never changed.

The Enterprise wasn't controlling the mated flight...
I conceed that there may well be an angle in there for aero reasons, but I want to confirm it really exists before I change tons of code. "3D models don't fit" isn't enough evidence for this, especially when there isn't a single bit of info pointing to some angle existing in there, plus there is info saying the axis match, plus it would make GNC harder.

---------- Post added at 11:40 AM ---------- Previous post was at 12:23 AM ----------

I just committed a scenario to run TAEM at Edwards. It should allow all TAEM and A/L trajectory options to be "exercised". FCS is (still) "wonky", so although most guidance references are correct*, they might not be followed perfectly.
Tons of things are still missing from the displays, others need fine-tuning. I'll work them after Entry guidance.

*) Some parameters are "stock" so the whole thing might not fit perfectly, but it gets to the runway. Also, TAEM has several requirements, so you might see e.g. altitude diverge for a while, but that is to correct Qbar or E/W. PRFNL roll has a small issue... I'll track that down later.

DaveS · 09-08-2018, 12:57 PM

Quote:

Originally Posted by GLS

That assumes that the attachment points in the OV are leveled, which they aren't.

These 2 sentences contradict each other. If the axis are leveled, there is no angle.

The Enterprise wasn't controlling the mated flight...

But she was active unless you think she was rapidly powered up following separation from the SCA. Only during the Captive-Inert tests was Enterprise powered down, essentially mimicking a ferry flight. Starting with the Captive-Active Tests was she fully powered up and had a crew onboard.

So just to clarify here: What we need to know is the orbiter had any AoA when mated to the ET?

GLS · 09-08-2018, 02:23 PM

Quote:

Originally Posted by DaveS

But she was active unless you think she was rapidly powered up following separation from the SCA. Only during the Captive-Inert tests was Enterprise powered down, essentially mimicking a ferry flight. Starting with the Captive-Active Tests was she fully powered up and had a crew onboard.

Yes, the vehicle was "on", but wasn't controlling the flight, i.e., "go up", "turn that way", "more thrust from the jet engines", etc...

Quote:

Originally Posted by DaveS

So just to clarify here: What we need to know is the orbiter had any AoA when mated to the ET?

Pretty much. I'm sure there were tollerances and also things changed as the ET shrunk during tanking, and then expanded again in flight, but in the end we need to know what is the default or standard positioning of the OV in relation to the ET. IMO, all bits of info so far point to them being fully aligned.

GLS · 09-12-2018, 06:31 PM

Any "experts" here on M50? I was adding the ECI and ECEF code to UltraMath and noticed this:

Code:

const double AXIS_TILT = 23.4458878*RAD;

Decided to cross check with the value Earth.cfg and they don't match...

I didn't check where the code is used, but it should be in the OrbitDAP. If nobody knows if changing the value is good or bad, I'll just create a ticket so it doesn't fall thru the cracks.

**Urwumpe** · 09-12-2018, 07:36 PM

Quote:

Originally Posted by GLS

Any "experts" here on M50? I was adding the ECI and ECEF code to UltraMath and noticed this:

Code:

const double AXIS_TILT = 23.4458878*RAD;

Decided to cross check with the value Earth.cfg and they don't match...

I didn't check where the code is used, but it should be in the OrbitDAP. If nobody knows if changing the value is good or bad, I'll just create a ticket so it doesn't fall thru the cracks.

Could be correct. W50 uses Epoch B1950 = 1950 January 0.9235 TT, J2000 (Orbiter) uses epoch J2000 = January 1st, 2000 12:00 TT

It should be 23.439281° today. Still researching an exact measurement of 1950...

---------- Post added at 21:36 ---------- Previous post was at 21:17 ----------

Here is the source of the axial tilt value, BTW: https://www.orbiter-forum.com/showthread.php?t=981

GLS · 09-12-2018, 08:59 PM

Quote:

Originally Posted by Urwumpe

Could be correct. W50 uses Epoch B1950 = 1950 January 0.9235 TT, J2000 (Orbiter) uses epoch J2000 = January 1st, 2000 12:00 TT

It should be 23.439281° today. Still researching an exact measurement of 1950...

---------- Post added at 21:36 ---------- Previous post was at 21:17 ----------

Here is the source of the axial tilt value, BTW: https://www.orbiter-forum.com/showthread.php?t=981

Thanks!
That's another thing I'd like to see done: a finished/fixed OrbitDAP so we can point whatever part of the vehicle to whatever part of the sky or Earth.

Levss135 · 09-14-2018, 06:46 PM

Hello,

I created my own test scenraio with SSU v5. It contains 2 Shuttle on the launchpads (LC39A,LC39B). Everything is configured for one shuttle launch, I mean one is going to fly and the other stays on the ground.

The scenario is working almost normal. But the RSS door of the Launchpad is closed at T-10min, and the clock is stopping at T-4min.

There is a pictures about my double shuttle configuration:

And the pictures of the RSS door at T-4min:

this is the scenario file:

Code:

BEGIN_DESC
Why doesn't it work?
END_DESC

BEGIN_ENVIRONMENT
  System Sol
  Date MJD 58375.629349
  CONTEXT SSU
END_ENVIRONMENT

BEGIN_FOCUS
  Ship Discovery
END_FOCUS

BEGIN_CAMERA
  TARGET Discovery
  MODE Extern
  POS 3.31 -0.51 -70.39
  TRACKMODE Ground Earth
  GROUNDLOCATION -80.60282 28.60649 6.14
  GROUNDDIRECTION 121.51 6.82
  FOV 1.88
  BEGIN_PRESET
    Ground:Discovery:1.88:Earth -80.60282 28.60649 6.14 2.12 0.12
  END_PRESET
END_CAMERA

BEGIN_MFD Left
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD Right
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 3
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 4
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 5
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 6
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 7
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 9
  TYPE User
  MODE CRT
END_MFD

BEGIN_MFD 10
  TYPE User
  MODE CRT
END_MFD

BEGIN_VC
END_VC


BEGIN_SHIPS
MLP-2_2:SSU_MLP
  STATUS Landed Earth
  POS -80.6209 28.6271
  HEADING 0.00
  ATTACHED 0:0,LC39B
  NAVFREQ 0 0
  T0_UMB 0 0.0000
END
LCC:SSU_LCC
  STATUS Landed Earth
  POS -80.6493245 28.5852249
  HEADING 35.60
  LAUNCH_MJD 58375.699349
  PAD_NAME LC39B
END
LC39B:SSU_Pad
  STATUS Landed Earth
  POS -80.620863 28.627092
  HEADING 270.00
  NAVFREQ 0 0
  ACCESS_ARM 1 1.0000
  GVA 1 1.0000
  VENTHOOD 1 1.0000
  FSS_OWP 0 0.0000
  RSS_OWP 0 0.0000
  RSS 1 1.0000
  FSS_GH2 0 0.0000
  FSS_IAA 0 0.0000
  SHUTTLE Atlantis
END
Atlantis:SpaceShuttleUltra
  STATUS Landed Earth
  POS -80.620863 28.627092
  HEADING 0.00
  ATTACHED 0:0,MLP-2_2
  PRPLEVEL 0:1.000000 1:1.000000 2:0.922450 3:1.000000 4:1.000000 5:1.000000 6:1.000000 7:1.000000 

8:0.775274 11:0.020000
  NAVFREQ 0 0
  CONFIGURATION 0
  MISSION STS-140
  OPS 101
  GEAR 0 0.0000
  PLB_CAM 0 -90.00000 -0.0 90.0000 0.0000 -90.0000 0.000 90.0000
@SUBSYSTEM ADPS
  LEFT_AIRDATAPROBE 1 3 0
  RIGHT_AIRDATAPROBE 1 3 0
@ENDSUBSYSTEM		;ADPS
  MTU_MET_RUNNING 0
  MTU_MET0 0.000
  MTU_MET1 0.000
  MTU_MET2 0.000
   EVENT_TIMER0 540.000000 DOWN STOPPED
   EVENT_TIMER1 0.000000 DOWN STOPPED
@SUBSYSTEM RMS
  ARM_STATUS 0.500000 0.013600 0.014688 0.500000 0.500000 0.500000
  SHOULDER_BRACE 1.000
  GRAPPLE 1 1.0000
  RIGIDIZE 1 1.0000
  EXTEND 1 1.0000
  RMS_ELBOW_CAM 0.0000 0.0000
  RMS_ROLLOUT 0 0.0000
  RMS_LATCHES 0 0.0000
@ENDSUBSYSTEM		;RMS
@SUBSYSTEM STBD_MPM
  STBD_MPM_ROLLOUT 0 0.0000
  STBD_MPM_LATCHES 0 0.0000
  STBD_MPM_ATTACHED_PAYLOAD Ultra_OBSS 0
@ENDSUBSYSTEM		;STBD_MPM
@SUBSYSTEM HeEng_C
  PRESS 4100
  VALVES 1 1 0 0
@ENDSUBSYSTEM		;HeEng_C
@SUBSYSTEM HeEng_L
  PRESS 4100
  VALVES 1 1 0 0
@ENDSUBSYSTEM		;HeEng_L
@SUBSYSTEM HeEng_R
  PRESS 4100
  VALVES 1 1 0 0
@ENDSUBSYSTEM		;HeEng_R
@SUBSYSTEM HePneu
  PRESS 4100
  VALVES 1 1 0 
@ENDSUBSYSTEM		;HePneu
@SUBSYSTEM MPS_C
  SSME config 1
  VIE config 1
  DCU_chA config 1
  DCU_chB config 1
  CIE_chA config 1
  CIE_chB config 1
@ENDSUBSYSTEM		;MPS_C
@SUBSYSTEM MPS_L
  SSME config 1
  VIE config 1
  DCU_chA config 1
  DCU_chB config 1
  CIE_chA config 1
  CIE_chB config 1
@ENDSUBSYSTEM		;MPS_L
@SUBSYSTEM MPS_R
  SSME config 1
  VIE config 1
  DCU_chA config 1
  DCU_chB config 1
  CIE_chA config 1
  CIE_chB config 1
@ENDSUBSYSTEM		;MPS_R
@SUBSYSTEM IDP1
  IDP1 SPEC 65535
  IDP1 DISP 65535
@ENDSUBSYSTEM		;IDP1
@SUBSYSTEM IDP2
  IDP2 SPEC 65535
  IDP2 DISP 18
@ENDSUBSYSTEM		;IDP2
@SUBSYSTEM IDP3
  IDP3 SPEC 65535
  IDP3 DISP 18
@ENDSUBSYSTEM		;IDP3
@SUBSYSTEM IDP4
  IDP4 SPEC 65535
  IDP4 DISP 65535
@ENDSUBSYSTEM		;IDP4
@SUBSYSTEM SimpleGPCSystem
  @BEGINSOFTWARE ATVC_SOP
  CONFIG 0
  @ENDSOFTWARE 
@ENDSUBSYSTEM		;SimpleGPCSystem
@SUBSYSTEM ETUmbDoors
  ET_DOORS 1.000000 1.000000
  ET_DOOR_LATCHES 0.000000 1.000000 1.000000
@ENDSUBSYSTEM		;ETUmbDoors
@SUBSYSTEM PayloadBay
  CARGODOOR 0 0.0000
  RADIATOR_PORT 0 0.0000
  RADIATOR_STBD 0 0.0000
  RADLATCH_PORT 0 0.0000
  RADLATCH_STBD 0 0.0000
  KUBAND 0 0.0000
  BAYDOORLATCH0 0 0.0000
  BAYDOORLATCH1 0 0.0000
  BAYDOORLATCH2 0 0.0000
  BAYDOORLATCH3 0 0.0000
@ENDSUBSYSTEM		;PayloadBay
  @PANEL F2
  "F2_SPDBKTHROT_AUTO" 1
  "F2_BODYFLAP_AUTO" 1
  "F2_PITCH_AUTO" 1
  "F2_PITCH_CSS" 0
  "F2_RY_AUTO" 1
  "F2_RY_CSS" 0
  @ENDPANEL 
  @PANEL F4
  "F4_SPDBKTHROT_AUTO" 1
  "F4_BODYFLAP_AUTO" 1
  "F4_PITCH_AUTO" 1
  "F4_PITCH_CSS" 0
  "F4_RY_AUTO" 1
  "F4_RY_CSS" 0
  @ENDPANEL 
  @PANEL F6
  "Cdr Flt Cntlr Pwr" ON
  @ENDPANEL 
  @PANEL F8
  "Plt Flt Cntlr Pwr" ON
  @ENDPANEL 
  @PANEL R2
  "Boiler1 N2 Supply" ON
  "Boiler2 N2 Supply" ON
  "Boiler3 N2 Supply" ON
  "Boiler1 Cntlr" ON
  "Boiler2 Cntlr" ON
  "Boiler3 Cntlr" ON
  "Boiler1 Cntlr Pwr/Htr" A
  "Boiler2 Cntlr Pwr/Htr" A
  "Boiler3 Cntlr Pwr/Htr" A
  "APU1 Run" OFF
  "APU2 Run" OFF
  "APU3 Run" OFF
  "Hyd Main Pump Press 1" LOW
  "Hyd Main Pump Press 2" LOW
  "Hyd Main Pump Press 3" LOW
  "APU1 Cntlr Pwr " OFF
  "APU2 Cntlr Pwr " OFF
  "APU3 Cntlr Pwr " OFF
  "APU1 Fuel Tank Valve" CLOSE
  "APU2 Fuel Tank Valve" CLOSE
  "APU3 Fuel Tank Valve" CLOSE
  "ET Umb Centerline Latch" GND
  "ET Umb Left Door" OFF
  "ET Umb Left Door Latch" OFF
  "ET Umb Right Door" OFF
  "ET Umb Right Door Latch" OFF
  "MPS Pwr Left AC2" [1]
  "MPS Pwr Ctr AC1" [1]
  "MPS Pwr Right AC3" [1]
  "MPS Pwr Left AC3" [1]
  "MPS Pwr Ctr AC2" [1]
  "MPS Pwr Right AC1" [1]
  "MPS He Isol A Left" OPEN
  "MPS He Isol A Ctr" OPEN
  "MPS He Isol A Right" OPEN
  "MPS He Isol B Left" OPEN
  "MPS He Isol B Ctr" OPEN
  "MPS He Isol B Right" OPEN
  "MPS PRPLT Dump Sequence" GPC
  "MPS PRPLT Backup LH2 vlv" GPC
  "Pneu L Eng He XOVR" GPC
  "Pneu He Isol" OPEN
  "He Interconnect Left" GPC
  "He Interconnect Ctr" GPC
  "He Interconnect Right" GPC
  "LH2 Ullage Press" AUTO
  @ENDPANEL 
  @PANEL C3
  "LOMS Arm" ARM/PRESS
  "ROMS Arm" ARM/PRESS
  "BFC CRT Display" ON
  "BFC CRT Select" 2+3
  "LADP Stow Enable" INHIBIT
  "RADP Stow Enable" INHIBIT
  "LADP Deploy" STOW
  "RADP Deploy" STOW
  "MAIN ENGINE LIMIT SHUT DN" AUTO
  "SSME Left S/D PB Cover" [0]
  "SSME Ctr S/D PB Cover" [0]
  "SSME Right S/D PB Cover" [0]
  "SRB Separation" AUTO
  "SRB Separation PB Cover" [0]
  "ET Separation" AUTO
  "ET Separation PB Cover" [0]
  @ENDPANEL 
  @PANEL O6
  "L GLRSHLD FLOOD" VAR
  "S TRK DR CNTL SYS1 Cover" [0]
  "S TRK DR CNTL SYS2 Cover" [0]
  "S TRK DR CNTL SYS1" OFF
  "S TRK DR CNTL SYS2" OFF
  "GPC_POWER_1_COVER" [0]
  "GPC_POWER_2_COVER" [0]
  "GPC_POWER_3_COVER" [0]
  "GPC_POWER_4_COVER" [0]
  "GPC_POWER_5_COVER" [0]
  "GPC POWER 1" ON
  "GPC POWER 2" ON
  "GPC POWER 3" ON
  "GPC POWER 4" ON
  "GPC POWER 5" ON
  "GPC_OUTPUT_1_COVER" [0]
  "GPC_OUTPUT_2_COVER" [0]
  "GPC_OUTPUT_3_COVER" [0]
  "GPC_OUTPUT_4_COVER" [0]
  "GPC_OUTPUT_5_COVER" [0]
  "GPC OUTPUT 1" NORMAL
  "GPC OUTPUT 2" NORMAL
  "GPC OUTPUT 3" NORMAL
  "GPC OUTPUT 4" NORMAL
  "GPC OUTPUT 5" BACKUP
  "IPL SOURCE" OFF
  "GPC MODE 1" RUN
  "GPC MODE 2" RUN
  "GPC MODE 3" RUN
  "GPC MODE 4" RUN
  "GPC MODE 5" RUN
  @ENDPANEL 
  @PANEL O17
  "EIU L-C" ON
  "EIU C-R" ON
  "EIU R-L" ON
  @ENDPANEL 
  @PANEL R13L
  "PL Bay Door SYS 1" DISABLE
  "PL Bay Door SYS 2" DISABLE
  "PL Bay Mech PWR SYS 1" OFF
  "PL Bay Mech PWR SYS 2" OFF
  "PL Bay Door" STOP
  "Latch Control SYS A" OFF
  "Latch Control SYS B" OFF
  "Radiator Control SYS A" OFF
  "Radiator Control SYS B" OFF
  "KU Antenna Direct Stow" OFF
  "KU Antenna" GND
  @ENDPANEL 
  @PANEL A1U
  "SLEW RATE" SLOW
  "CONTROL" PANEL
  "STEERING MODE" MAN SLEW
  "POWER" OFF
  "MODE" RDR PASSIVE
  "RADAR OUTPUT" LOW
  @ENDPANEL 
END
ET:SSU_SLWT
  STATUS Orbiting Earth
  PRPLEVEL 0:0.996000
  ATTACHED 0:20,Atlantis
END
LSRB:SSU_LSRB_RSRM
  STATUS Orbiting Earth
  ATTACHED 0:21,Atlantis
END
RSRB:SSU_RSRB_RSRM
  STATUS Orbiting Earth
  ATTACHED 0:22,Atlantis
END
MLP-2:SSU_MLP
  STATUS Landed Earth
  POS-80.6040620 28.608403
  HEADING 270.00
  ATTACHED 0:0,LC39A
  NAVFREQ 0 0
  T0_UMB 0 0.0000
END
LC39A:SSU_Pad
  STATUS Landed Earth
  POS -80.6040720 28.6083850
  HEADING 270.00
  NAVFREQ 0 0
  ACCESS_ARM 1 1.0000
  GVA 1 1.0000
  VENTHOOD 1 1.0000
  FSS_OWP 0 0.0000
  RSS_OWP 0 0.0000
  RSS 1 1.0000
  FSS_GH2 0 0.0000
  FSS_IAA 0 0.0000
  SHUTTLE Discovery
END
Discovery:SpaceShuttleUltra
  STATUS Landed Earth
  POS -80.620863 28.627092
  HEADING 0.00
  ATTACHED 0:0,MLP-2
  PRPLEVEL 0:1.000000 1:1.000000 2:0.922450 3:1.000000 4:1.000000 5:1.000000 6:1.000000 7:1.000000 

8:0.775274 11:0.020000
  NAVFREQ 0 0
  CONFIGURATION 0
  MISSION STS-141
  OPS 101
  GEAR 0 0.0000
  PLB_CAM 0 -90.00000 -0.0 90.0000 0.0000 -90.0000 0.000 90.0000
@SUBSYSTEM ADPS
  LEFT_AIRDATAPROBE 1 3 0
  RIGHT_AIRDATAPROBE 1 3 0
@ENDSUBSYSTEM		;ADPS
  MTU_MET_RUNNING 0
  MTU_MET0 0.000
  MTU_MET1 0.000
  MTU_MET2 0.000
   EVENT_TIMER0 540.000000 DOWN STOPPED
   EVENT_TIMER1 0.000000 DOWN STOPPED
@SUBSYSTEM RMS
  ARM_STATUS 0.500000 0.013600 0.014688 0.500000 0.500000 0.500000
  SHOULDER_BRACE 1.000
  GRAPPLE 1 1.0000
  RIGIDIZE 1 1.0000
  EXTEND 1 1.0000
  RMS_ELBOW_CAM 0.0000 0.0000
  RMS_ROLLOUT 0 0.0000
  RMS_LATCHES 0 0.0000
@ENDSUBSYSTEM		;RMS
@SUBSYSTEM STBD_MPM
  STBD_MPM_ROLLOUT 0 0.0000
  STBD_MPM_LATCHES 0 0.0000
  STBD_MPM_ATTACHED_PAYLOAD Ultra_OBSS 0
@ENDSUBSYSTEM		;STBD_MPM
@SUBSYSTEM HeEng_C
  PRESS 4100
  VALVES 1 1 0 0
@ENDSUBSYSTEM		;HeEng_C
@SUBSYSTEM HeEng_L
  PRESS 4100
  VALVES 1 1 0 0
@ENDSUBSYSTEM		;HeEng_L
@SUBSYSTEM HeEng_R
  PRESS 4100
  VALVES 1 1 0 0
@ENDSUBSYSTEM		;HeEng_R
@SUBSYSTEM HePneu
  PRESS 4100
  VALVES 1 1 0 
@ENDSUBSYSTEM		;HePneu
@SUBSYSTEM MPS_C
  SSME config 1
  VIE config 1
  DCU_chA config 1
  DCU_chB config 1
  CIE_chA config 1
  CIE_chB config 1
@ENDSUBSYSTEM		;MPS_C
@SUBSYSTEM MPS_L
  SSME config 1
  VIE config 1
  DCU_chA config 1
  DCU_chB config 1
  CIE_chA config 1
  CIE_chB config 1
@ENDSUBSYSTEM		;MPS_L
@SUBSYSTEM MPS_R
  SSME config 1
  VIE config 1
  DCU_chA config 1
  DCU_chB config 1
  CIE_chA config 1
  CIE_chB config 1
@ENDSUBSYSTEM		;MPS_R
@SUBSYSTEM IDP1
  IDP1 SPEC 65535
  IDP1 DISP 65535
@ENDSUBSYSTEM		;IDP1
@SUBSYSTEM IDP2
  IDP2 SPEC 65535
  IDP2 DISP 18
@ENDSUBSYSTEM		;IDP2
@SUBSYSTEM IDP3
  IDP3 SPEC 65535
  IDP3 DISP 18
@ENDSUBSYSTEM		;IDP3
@SUBSYSTEM IDP4
  IDP4 SPEC 65535
  IDP4 DISP 65535
@ENDSUBSYSTEM		;IDP4
@SUBSYSTEM SimpleGPCSystem
  @BEGINSOFTWARE ATVC_SOP
  CONFIG 0
  @ENDSOFTWARE 
@ENDSUBSYSTEM		;SimpleGPCSystem
@SUBSYSTEM ETUmbDoors
  ET_DOORS 1.000000 1.000000
  ET_DOOR_LATCHES 0.000000 1.000000 1.000000
@ENDSUBSYSTEM		;ETUmbDoors
@SUBSYSTEM PayloadBay
  CARGODOOR 0 0.0000
  RADIATOR_PORT 0 0.0000
  RADIATOR_STBD 0 0.0000
  RADLATCH_PORT 0 0.0000
  RADLATCH_STBD 0 0.0000
  KUBAND 0 0.0000
  BAYDOORLATCH0 0 0.0000
  BAYDOORLATCH1 0 0.0000
  BAYDOORLATCH2 0 0.0000
  BAYDOORLATCH3 0 0.0000
@ENDSUBSYSTEM		;PayloadBay
  @PANEL F2
  "F2_SPDBKTHROT_AUTO" 1
  "F2_BODYFLAP_AUTO" 1
  "F2_PITCH_AUTO" 1
  "F2_PITCH_CSS" 0
  "F2_RY_AUTO" 1
  "F2_RY_CSS" 0
  @ENDPANEL 
  @PANEL F4
  "F4_SPDBKTHROT_AUTO" 1
  "F4_BODYFLAP_AUTO" 1
  "F4_PITCH_AUTO" 1
  "F4_PITCH_CSS" 0
  "F4_RY_AUTO" 1
  "F4_RY_CSS" 0
  @ENDPANEL 
  @PANEL F6
  "Cdr Flt Cntlr Pwr" ON
  @ENDPANEL 
  @PANEL F8
  "Plt Flt Cntlr Pwr" ON
  @ENDPANEL 
  @PANEL R2
  "Boiler1 N2 Supply" ON
  "Boiler2 N2 Supply" ON
  "Boiler3 N2 Supply" ON
  "Boiler1 Cntlr" ON
  "Boiler2 Cntlr" ON
  "Boiler3 Cntlr" ON
  "Boiler1 Cntlr Pwr/Htr" A
  "Boiler2 Cntlr Pwr/Htr" A
  "Boiler3 Cntlr Pwr/Htr" A
  "APU1 Run" OFF
  "APU2 Run" OFF
  "APU3 Run" OFF
  "Hyd Main Pump Press 1" LOW
  "Hyd Main Pump Press 2" LOW
  "Hyd Main Pump Press 3" LOW
  "APU1 Cntlr Pwr " OFF
  "APU2 Cntlr Pwr " OFF
  "APU3 Cntlr Pwr " OFF
  "APU1 Fuel Tank Valve" CLOSE
  "APU2 Fuel Tank Valve" CLOSE
  "APU3 Fuel Tank Valve" CLOSE
  "ET Umb Centerline Latch" GND
  "ET Umb Left Door" OFF
  "ET Umb Left Door Latch" OFF
  "ET Umb Right Door" OFF
  "ET Umb Right Door Latch" OFF
  "MPS Pwr Left AC2" [1]
  "MPS Pwr Ctr AC1" [1]
  "MPS Pwr Right AC3" [1]
  "MPS Pwr Left AC3" [1]
  "MPS Pwr Ctr AC2" [1]
  "MPS Pwr Right AC1" [1]
  "MPS He Isol A Left" OPEN
  "MPS He Isol A Ctr" OPEN
  "MPS He Isol A Right" OPEN
  "MPS He Isol B Left" OPEN
  "MPS He Isol B Ctr" OPEN
  "MPS He Isol B Right" OPEN
  "MPS PRPLT Dump Sequence" GPC
  "MPS PRPLT Backup LH2 vlv" GPC
  "Pneu L Eng He XOVR" GPC
  "Pneu He Isol" OPEN
  "He Interconnect Left" GPC
  "He Interconnect Ctr" GPC
  "He Interconnect Right" GPC
  "LH2 Ullage Press" AUTO
  @ENDPANEL 
  @PANEL C3
  "LOMS Arm" ARM/PRESS
  "ROMS Arm" ARM/PRESS
  "BFC CRT Display" ON
  "BFC CRT Select" 2+3
  "LADP Stow Enable" INHIBIT
  "RADP Stow Enable" INHIBIT
  "LADP Deploy" STOW
  "RADP Deploy" STOW
  "MAIN ENGINE LIMIT SHUT DN" AUTO
  "SSME Left S/D PB Cover" [0]
  "SSME Ctr S/D PB Cover" [0]
  "SSME Right S/D PB Cover" [0]
  "SRB Separation" AUTO
  "SRB Separation PB Cover" [0]
  "ET Separation" AUTO
  "ET Separation PB Cover" [0]
  @ENDPANEL 
  @PANEL O6
  "L GLRSHLD FLOOD" VAR
  "S TRK DR CNTL SYS1 Cover" [0]
  "S TRK DR CNTL SYS2 Cover" [0]
  "S TRK DR CNTL SYS1" OFF
  "S TRK DR CNTL SYS2" OFF
  "GPC_POWER_1_COVER" [0]
  "GPC_POWER_2_COVER" [0]
  "GPC_POWER_3_COVER" [0]
  "GPC_POWER_4_COVER" [0]
  "GPC_POWER_5_COVER" [0]
  "GPC POWER 1" ON
  "GPC POWER 2" ON
  "GPC POWER 3" ON
  "GPC POWER 4" ON
  "GPC POWER 5" ON
  "GPC_OUTPUT_1_COVER" [0]
  "GPC_OUTPUT_2_COVER" [0]
  "GPC_OUTPUT_3_COVER" [0]
  "GPC_OUTPUT_4_COVER" [0]
  "GPC_OUTPUT_5_COVER" [0]
  "GPC OUTPUT 1" NORMAL
  "GPC OUTPUT 2" NORMAL
  "GPC OUTPUT 3" NORMAL
  "GPC OUTPUT 4" NORMAL
  "GPC OUTPUT 5" BACKUP
  "IPL SOURCE" OFF
  "GPC MODE 1" RUN
  "GPC MODE 2" RUN
  "GPC MODE 3" RUN
  "GPC MODE 4" RUN
  "GPC MODE 5" RUN
  @ENDPANEL 
  @PANEL O17
  "EIU L-C" ON
  "EIU C-R" ON
  "EIU R-L" ON
  @ENDPANEL 
  @PANEL R13L
  "PL Bay Door SYS 1" DISABLE
  "PL Bay Door SYS 2" DISABLE
  "PL Bay Mech PWR SYS 1" OFF
  "PL Bay Mech PWR SYS 2" OFF
  "PL Bay Door" STOP
  "Latch Control SYS A" OFF
  "Latch Control SYS B" OFF
  "Radiator Control SYS A" OFF
  "Radiator Control SYS B" OFF
  "KU Antenna Direct Stow" OFF
  "KU Antenna" GND
  @ENDPANEL 
  @PANEL A1U
  "SLEW RATE" SLOW
  "CONTROL" PANEL
  "STEERING MODE" MAN SLEW
  "POWER" OFF
  "MODE" RDR PASSIVE
  "RADAR OUTPUT" LOW
  @ENDPANEL 
END
ET:SSU_SLWT
  STATUS Orbiting Earth
  PRPLEVEL 0:0.996000
  ATTACHED 0:20,Discovery
END
LSRB:SSU_LSRB_RSRM
  STATUS Orbiting Earth
  ATTACHED 0:21,Discovery
END
RSRB:SSU_RSRB_RSRM
  STATUS Orbiting Earth
  ATTACHED 0:22,Discovery
END
END_SHIPS

BEGIN_ExtMFD
END

Thank you for your helps and tipps,

GLS · 09-25-2018, 10:36 PM

Still tons of work to do, but the new entry guidance just flew the first reentry without killing the crew or destroying the vehicle!

Continuing on to TAEM and A/L, and I just went from orbit (or EI at least) to the centerline of the runway in AUTO!

I'm so happy right now that I'd post an image of the landing, but the OV model is still all messed up on my end...

**Wolf** · 09-25-2018, 10:50 PM

Quote:

Originally Posted by GLS

Still tons of work to do, but the new entry guidance just flew the first reentry without killing the crew or destroying the vehicle!

Continuing on to TAEM and A/L, and I just went from orbit (or EI at least) to the centerline of the runway in AUTO!

I'm so happy right now that I'd post an image of the landing, but the OV model is still all messed up on my end...

What is messed up?

GLS · 09-25-2018, 11:50 PM

Quote:

Originally Posted by Wolf

What is messed up?

https://sourceforge.net/p/shuttleultra/tickets/171/
Which, I'm pretty sure, is the source of some animations being messed-up. There is also the mapping to finish.

**Urwumpe** · 09-28-2018, 12:59 PM

Some interesting paper with maybe small implications for our GNC work:

https://ntrs.nasa.gov/archive/nasa/c...0110003998.pdf

The Shuttle used both kinds of star trackers at the same time later, because of problems tracking the ISS with the newer solid state trackers (as the ISS was too bright)

One conclusion of it: we should make the installed star tracker type a mission file option. There had been some experimentation during the ISS assembly missions and the Orbiters launched with different star tracker configurations.

(And we should make spare parts limited. For being pure evil.)

09-12-2018, 06:31 PM	#2003
GLS Addon Developer	Any "experts" here on M50? I was adding the ECI and ECEF code to UltraMath and noticed this: Code: const double AXIS_TILT = 23.4458878*RAD; Decided to cross check with the value Earth.cfg and they don't match... I didn't check where the code is used, but it should be in the OrbitDAP. If nobody knows if changing the value is good or bad, I'll just create a ticket so it doesn't fall thru the cracks.

09-12-2018, 07:36 PM	#2004
Urwumpe Certain Super User	Quote: Originally Posted by GLS Any "experts" here on M50? I was adding the ECI and ECEF code to UltraMath and noticed this: Code: const double AXIS_TILT = 23.4458878*RAD; Decided to cross check with the value Earth.cfg and they don't match... I didn't check where the code is used, but it should be in the OrbitDAP. If nobody knows if changing the value is good or bad, I'll just create a ticket so it doesn't fall thru the cracks. Could be correct. W50 uses Epoch B1950 = 1950 January 0.9235 TT, J2000 (Orbiter) uses epoch J2000 = January 1st, 2000 12:00 TT It should be 23.439281° today. Still researching an exact measurement of 1950... ---------- Post added at 21:36 ---------- Previous post was at 21:17 ---------- Here is the source of the axial tilt value, BTW: https://www.orbiter-forum.com/showthread.php?t=981

09-28-2018, 12:59 PM	#2010
Urwumpe Certain Super User	Some interesting paper with maybe small implications for our GNC work: https://ntrs.nasa.gov/archive/nasa/c...0110003998.pdf The Shuttle used both kinds of star trackers at the same time later, because of problems tracking the ISS with the newer solid state trackers (as the ISS was too bright) One conclusion of it: we should make the installed star tracker type a mission file option. There had been some experimentation during the ISS assembly missions and the Orbiters launched with different star tracker configurations. (And we should make spare parts limited. For being pure evil.) Last edited by Urwumpe; 09-28-2018 at 01:04 PM.

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09-07-2018, 04:00 PM	#1996
GLS Addon Developer	Quote: Originally Posted by DaveS Well, the angle is very minute and documents with graphics have a very hard time showing very minute details such as sub-degree angles. I just drew a line 0.2° line myself in Paint.NET and it is not even detectable. I can ask someone who should definitely know, a retired NASA-KSC Shuttle Mechanical Systems (group callsign MEQ) engineer who worked alot of orbiter/ET mates (and few demates) right up to the very end. He should know if the the orbiter had an angle when mated. Please ask, as it's much better to hear it from the "horse's mouth" than us here trying to guess. I'm sure there were some tolerances (like 0.0º +/-0.1º), but the "normal" angle is what we need.

09-07-2018, 10:34 PM	#1997
DaveS Addon Developer	I have sent the message with the question. I'll relay anything worthwhile. ---------- Post added 09-08-18 at 12:34 AM ---------- Previous post was 09-07-18 at 06:05 PM ---------- Can someone verify the math in this post on the NASASpaceflight.com forum by Fequalsma: https://forum.nasaspaceflight.com/in...722#msg1853722 1.1°s sounds a bit much.

09-07-2018, 10:45 PM	#1998
GLS Addon Developer	Quote: Originally Posted by DaveS Can someone verify the math in this post on the NASASpaceflight.com forum by Fequalsma: https://forum.nasaspaceflight.com/in...722#msg1853722 1.1°s sounds a bit much. The math is OK. It assumes we want to calculate the angle between the attachments, which is not what we need... We need the angle between the axis of the OV and ET.

09-07-2018, 11:12 PM	#1999
DaveS Addon Developer	Quote: Originally Posted by GLS The math is OK. It assumes we want to calculate the angle between the attachments, which is not what we need... We need the angle between the axis of the OV and ET. Can't that be calculated from the angle between the attachments? They're where they are, that doesn't change. And the orbiter axis doesn't change, it's still level with everything, it's just that the orbiter has a slight positive AoA when mated to the ET. Obviously Enterprise never had any issues with the 6° AoA used for the ALTs. And the shuttle GNC could easily sense the slight AoA as the reference plane never changed.

09-08-2018, 10:40 AM	#2000
GLS Addon Developer	Quote: Originally Posted by DaveS Can't that be calculated from the angle between the attachments? That assumes that the attachment points in the OV are leveled, which they aren't. Quote: Originally Posted by DaveS And the orbiter axis doesn't change, it's still level with everything, it's just that the orbiter has a slight positive AoA when mated to the ET. These 2 sentences contradict each other. If the axis are leveled, there is no angle. Quote: Originally Posted by DaveS Obviously Enterprise never had any issues with the 6° AoA used for the ALTs. And the shuttle GNC could easily sense the slight AoA as the reference plane never changed. The Enterprise wasn't controlling the mated flight... I conceed that there may well be an angle in there for aero reasons, but I want to confirm it really exists before I change tons of code. "3D models don't fit" isn't enough evidence for this, especially when there isn't a single bit of info pointing to some angle existing in there, plus there is info saying the axis match, plus it would make GNC harder. ---------- Post added at 11:40 AM ---------- Previous post was at 12:23 AM ---------- I just committed a scenario to run TAEM at Edwards. It should allow all TAEM and A/L trajectory options to be "exercised". FCS is (still) "wonky", so although most guidance references are correct, they might not be followed perfectly. Tons of things are still missing from the displays, others need fine-tuning. I'll work them after Entry guidance. ) Some parameters are "stock" so the whole thing might not fit perfectly, but it gets to the runway. Also, TAEM has several requirements, so you might see e.g. altitude diverge for a while, but that is to correct Qbar or E/W. PRFNL roll has a small issue... I'll track that down later.

09-08-2018, 12:57 PM	#2001
DaveS Addon Developer	Quote: Originally Posted by GLS That assumes that the attachment points in the OV are leveled, which they aren't. These 2 sentences contradict each other. If the axis are leveled, there is no angle. The Enterprise wasn't controlling the mated flight... But she was active unless you think she was rapidly powered up following separation from the SCA. Only during the Captive-Inert tests was Enterprise powered down, essentially mimicking a ferry flight. Starting with the Captive-Active Tests was she fully powered up and had a crew onboard. So just to clarify here: What we need to know is the orbiter had any AoA when mated to the ET?

09-08-2018, 02:23 PM	#2002
GLS Addon Developer	Quote: Originally Posted by DaveS But she was active unless you think she was rapidly powered up following separation from the SCA. Only during the Captive-Inert tests was Enterprise powered down, essentially mimicking a ferry flight. Starting with the Captive-Active Tests was she fully powered up and had a crew onboard. Yes, the vehicle was "on", but wasn't controlling the flight, i.e., "go up", "turn that way", "more thrust from the jet engines", etc... Quote: Originally Posted by DaveS So just to clarify here: What we need to know is the orbiter had any AoA when mated to the ET? Pretty much. I'm sure there were tollerances and also things changed as the ET shrunk during tanking, and then expanded again in flight, but in the end we need to know what is the default or standard positioning of the OV in relation to the ET. IMO, all bits of info so far point to them being fully aligned.

09-12-2018, 08:59 PM	#2005
GLS Addon Developer	Quote: Originally Posted by Urwumpe Could be correct. W50 uses Epoch B1950 = 1950 January 0.9235 TT, J2000 (Orbiter) uses epoch J2000 = January 1st, 2000 12:00 TT It should be 23.439281° today. Still researching an exact measurement of 1950... ---------- Post added at 21:36 ---------- Previous post was at 21:17 ---------- Here is the source of the axial tilt value, BTW: https://www.orbiter-forum.com/showthread.php?t=981 Thanks! That's another thing I'd like to see done: a finished/fixed OrbitDAP so we can point whatever part of the vehicle to whatever part of the sky or Earth.

09-25-2018, 10:36 PM	#2007
GLS Addon Developer	Still tons of work to do, but the new entry guidance just flew the first reentry without killing the crew or destroying the vehicle! Continuing on to TAEM and A/L, and I just went from orbit (or EI at least) to the centerline of the runway in AUTO! I'm so happy right now that I'd post an image of the landing, but the OV model is still all messed up on my end...

09-25-2018, 10:50 PM	#2008
Wolf Donator	Quote: Originally Posted by GLS Still tons of work to do, but the new entry guidance just flew the first reentry without killing the crew or destroying the vehicle! Continuing on to TAEM and A/L, and I just went from orbit (or EI at least) to the centerline of the runway in AUTO! I'm so happy right now that I'd post an image of the landing, but the OV model is still all messed up on my end... What is messed up?

09-25-2018, 11:50 PM	#2009
GLS Addon Developer	Quote: Originally Posted by Wolf What is messed up? https://sourceforge.net/p/shuttleultra/tickets/171/ Which, I'm pretty sure, is the source of some animations being messed-up. There is also the mapping to finish.