Ops Briefing:
Post-SM4 –V1 Vehicle Disturbance Test (VDT)
and Gyro Reconfiguration
June 24, 2009
Post-meeting edits made in bold red font.
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
Agenda
1.0 Engineering Team
(N. Tull)
2.0 Introduction/Overview
(N. Tull)
2.1 Statement of Adherence to AD2-17
2.2 Rationale for Spacecraft Change
2.3 Recommended Action
3.0 Supporting Documentation
(N. Tull)
4.0 Procedure Background and Validation
(B. Vreeland)
4.1 FSW Configuration Change Procedure
4.2 Subsystem Configuration Change Procedure
5.0 Procedure
(P. Ramsey)
5.1 Initial Conditions
5.2 Operations Requests
5.3 Summary of SMS Observing Plans
5.4 Timeline Review – MEGG
June 24, 2009
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Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
Agenda
6.0 Monitoring and System Impacts
(P. Ramsey)
6.1 On-orbit Validation / Monitoring
6.2 System Impacts
7.0 Constraints and Restrictions Review
(P. Ramsey)
7.1 CARD
7.2 OLD
8.0 Contingency Planning
(P. Ramsey)
8.1 Vehicle Contingencies
8.2 Ground Contingencies
9.0 Engineering Support Requirements
(P. Ramsey)
9.1 Personnel
9.2 Communications / Data
9.3 CCS Configuration
June 24, 2009
P. 3
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
1.0 Engineering Team
HST486
FSW
Shirley Duhaney
Mariam Gowans
Charlie Hicks
Norm Roy
Ron Stattel
Vickie Van Duyl
Brain Vreeland
Janelle Vreeland
STScI
Merle Reinhart
Sys
Mgmt
Nzinga Tull
June 24, 2009
PCS
Dave Murphy
Patrick Ramsey
Dan Smith
John Wirzburger
DMS
Ben Teasdel
Safing
Mike Myslinski
Ed Moy
P. 4
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
2.0 Introduction / Overview
2.1 Statement of Adherence to AD2-17
• Testing and preparation of the Vehicle Disturbance Test and associated gyro reconfiguration
followed the guidelines of:
» AD 2-17: Spacecraft Configuration Change Process
2.2 Rationale for Change
• Vehicle Disturbance Test (VDT) is performed to obtain measurements of the dynamic
responses of the vehicle structure post SM-4.
» Initial post-SM4 VDT was performed on 05/23/09
• Current configuration (G3456 on 06/18/09) must be updated for VDT
» Gyro 3 16.5 Hz resonance obscures structural modes
2.3 Recommended Action
• Update gyro motor current test limits for three-gyro configuration
» Current limit (70-260.4 mamps for 3 seconds) was set for 4 gyro ops (graceful fail-down to 3 gyro)
» Restore limit to 0-299.6 mamps for 90 sec for 3-gyro operations to avoid unwarranted safemode
• Configure for G456 for VDT
• Replace G3 data with G6 high speed gyro data for the duration of the VDT to aid in potential
troubleshooting after VDT
» G3 is out of the control loop for VDT so telemetry insight for that gyro is not needed during that time
• Execute VDT (via SMS)
• Configure to final 3-gyro configuration, G345, and power off G6
June 24, 2009
P. 5
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
3.0 Supporting Documentation
¤ Related Presentations:
• SM4 Mission and SMOV Operations Activities Operation Readiness
Review, PCS Section (04/24/09)
• Gyro Motor Current Test Update and Gyro Configuration Changes
(06/11/09)
• SMOV Morning Meeting, PCS Presentation (06/12/09)
June 24, 2009
P. 6
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
4.0 Procedure Background and Validation
4.1 FSW Configuration Change Procedure
• IP-170 “Vehicle Disturbance Test (VDT) Macros for SMOV-SM4”
» Successfully tested in DASDF facility on 06/24/09
•
•
•
DCR #1451r2 – SMOV-4 Vehicle Disturbance Test (VDT) Macros
SSM486 Release Message #167
Required files: QVDTMACC0.TAB (SMOV-SM4 VDT Macro table load file)
– Already loaded on HST for the May 2009 VDT
• IP-191 “Procedure to Modify Gyro Motor Current Safemode Limits”
» Successfully tested in DASDF facility on 06/24/09
•
•
•
DCR #1488 – Modify Gyro Motor Current Test Thresholds for Post SM4
SSM486 Release Message #187 -Required files: None.
• IP-193 “FSW Telemetry Update Q4DVP3”
» Successfully tested in DASDF facility on 06/24/09
•
•
•
June 24, 2009
DCR #1493 – Visibility of Q4DVP3 during VDT only
SSM486 Release Message #189
Required files
– QDCR14930.tab (Telemetry modifications to replace Q4VDP0 with 4DVP3 during VDT
Test
– QD1493BO0.tab (Back-out Telemetry modifications restore Q4VDP0)
P. 7
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
4.0 Procedure Background and Validation
4.2 Subsystem Configuration Change Procedure
• “Configure to 4-5-6 for VDT” Procedure and “Configure to 3-4-5 for Final Fly-away
Config”
» Derived from COP 3.48 “Rate Gyro Configuration”
» Successfully tested in DASDF facility on 06/24/09
» Required loads: SAC loads
June 24, 2009
P. 8
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
5.0 Procedure
5.1 & 5.2 Initial Conditions and Operations Requests (cont’d)
• Draft OR # 676 – -V1 VDT Gyro Configuration [20 minutes]
» Initial Conditions
• SSM486 FSW is executing in VSS with programmable telemetry enabled (for limit change)
• PCS in Normal Mode under RGA control with no maneuvers; FGS in default (gyro config)
» IP-191, Section A (Motor Current Limit Change)
• Set gyro motor current error flag to “2” to indicate that the gyro motor current safemode check is
disabled
• Disable 2-gyro configuration test
• Set up TMDIAGs to monitor Gyro A motor current limit values
• Uplink New Gyro A motor current limit values
• Set up TMDIAGs to monitor Gyro B motor current limit values
• Uplink New Gyro B motor current limit values
• Set up TMDIAGs to monitor Gyro C motor current limit values
• Uplink New Gyro C motor current limit values
• Set up TMDIAGs to monitor Gyro D motor current limit values
• Uplink New Gyro D motor current limit values
• Set gyro Motor current error flag to “0” to indicate that the gyro motor current safemode check is
enabled
• Enable 2-gyro configuration test
» “Configure to 4-5-6 for VDT” Procedure
• Terminate velocity aberration/parallax correction
• Place the gyros in high mode with autonomous mode switching disabled
• Uplink the Gyro Drift Rate Bias vector for the new gyro configuration
June 24, 2009
P. 9
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
5.0 Procedure
5.1 & 5.2 Initial Conditions and Operations Requests (cont’d)
• Draft OR # 676 – -V1 VDT Gyro Configuration (cont’d)
» “Configure to 4-5-6 for VDT” Procedure [cont'd]
• Set the Failed Gyro Pointer, number of active gyros and the gyro failure flag to transition to the
3-gyro configuration scale factor alignment matrix subtable.
• Load High Mode Offset table.
• Place Gyros in Low Mode with autonomous mode switching enabled
• OR # 18551 – -V1 VDT Gains & Telemetry Configuration
» Initial Conditions
• SSM486 FSW is executing in VSS with programmable telemetry enabled
• Telemetry is commanded to H format (VDT gains)
• SAGA is OFF, default configuration (VDT gains)
» IP-193, Installation Procedure (before VDT) [5 minutes]
• Switch telemetry to P format in order to load the telemetry patch loads which contain the
updates for the H format.
• Disable BMIC for table 32 (TlmSubcomTbl).
• Load the Telemetry modifications to “TlmSubcomTbl” to replace the Q4DVP0 with Q4DVP3 in H
format table load
• Enable and re-compute BMIC for table 32 “TlmSubcomTbl”
• Switch to Telemetry to H format
June 24, 2009
P. 10
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
5.0 Procedure
5.1 & 5.2 Initial Conditions and Operations Requests (cont’d)
• OR # 18551 – -V1 VDT Gains & Telemetry Configuration (cont’d)
» IP-170, VDT Activation Procedure (Section B) [10 minutes]
•
•
•
•
•
•
Set gyros to high mode/switching disabled, if QDFHILO = Low
Terminate Velocity Aberration and Parallax processing, if QDFABPX is not already OFF
If required, load TMDIAG for verification of current (SAGA off) gain values
Activate VDT Installation Macro 1 and verify the new gains
Place gyros in low mode
If required, disable friction compensation
» IP-170, VDT Deactivation Procedure (Section C) [10 minutes]
•
•
•
•
•
Set gyros to high mode/switching disabled, if QDFHILO = Low
If required, re-load TMDIAG for verification of the VDT gain values
Activate VDT De-installation Macro to restore (SAGA off) gains
Place gyros in low mode
If necessary, disable friction compensation
» IP-193, Removal Procedure (after VDT) [5 minutes]
• Switch telemetry to P format in order to load the telemetry patch loads which contain the
updates for the H format.
• Disable BMIC for table 32 (TlmSubcomTbl).
• Load the Telemetry modifications to “TlmSubcomTbl” to restore the Q4DVP0 in H format table
load
• Enable and re-compute BMIC for table 32 “TlmSubcomTbl”
• Switch to Telemetry to H format
June 24, 2009
P. 11
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
5.0 Procedure
5.1 & 5.2 Initial Conditions and Operations Requests (cont’d)
• OR # 18552 – Load, Dump and Compare Safemode Recovery Table Load
File [4 minutes]
» Initial Conditions
• SSM486 FSW is executing in VSS with programmable telemetry enabled
» Configure to 3-4-5 for final fly-away config, Step 2
•
•
•
•
June 24, 2009
Load the Safemode Recovery Table load file
Issue TDRSS GCMR and configure DMU COM Module per DMS ROP DF-01A
Dump the SPC Table (Table 1)
Compare the Recovery Macro Table Load with the Dump
P. 12
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
5.0 Procedure
5.1 & 5.2 Initial Conditions and Operations Requests (cont’d)
• Draft OR # 677 – Post-VDT Gyro 345 Configuration & Gyro 6 Power Off [10
minutes]
» Initial Conditions
• SAC RGA table load(s) are available for uplink
• PCS in Normal Mode under RGA control with no maneuvers; FGS in default (gyro config)
» “Configure to 3-4-5 for final fly-away config” Procedure
•
•
•
•
•
Turn velocity aberration/parallax computations off
If needed, place the gyros in high mode with autonomous mode switching disabled
If needed, uplink Gyro Drift Rate Bias Vector for the new gyro configuration
Load the High Mode Offset Table
Execute the Safemode Recovery Macro (Version O, 3-gyro, D-failed) to set all gyro related
pointers and flags
• Place Gyros into Low Mode with autonomous mode switching enabled.
» “Power off Gyro 6” Procedure
• Power off Gyro(s) and Disable Control Heater(s)
June 24, 2009
P. 13
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
5.0 Procedure
5.3 Summary of SMS Observing Plans
• Not applicable
5.4 Timeline Review
• See MEGG timeline on following pages
June 24, 2009
P. 14
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
Reconfiguration to 3 Gyro 456, 2009/175
IP-191, Section A
3 Gyro MC Safemode Limits
June 24, 2009
“Configure to Gyros 456
Procedure”
Includes bias & offset loads
Extension of forward link granted; forward is actually “MA” (not SSA)P. 15
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
Reconfiguration to 3 Gyro 456, 2009/175
Backup opportunities for
motor current limit and Gyro
456 configuration
June 24, 2009
P. 16
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
-V1 VDT Execution, 2009/176
IP-193, Installation
Q4DVP3 into Q4DVP0 slot
IP-170, Section B
Gain changes & RWA friction
compensation disable
June 24, 2009
In the next 6 hours:
“Configure Gyros to 345 Procedure, Step
2”
Load, Dump, and Compare
D-failed Safemode Recovery Macro
P. 17
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
-V1 VDT Recovery, 2009/177
IP-170, Section C
Gains restoration & RWA friction
compensation re-enable
IP-193, Removal
Q4DVP3 in 0 slot ends
June 24, 2009
P. 18
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
-V1 VDT Recovery, 2009/177
Backup supports for completing
gains & telemetry recovery
June 24, 2009
P. 19
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
3 Gyro 345 Reconfiguration, 2009/177
June 24, 2009
P. 20
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
3 Gyro 345 Reconfiguration, 2009/177
“Configure Gyro to 345
Procedure”
Includes bias and offset
loads
June 24, 2009
P. 21
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
3 Gyro 345 Reconfiguration, 2009/177
G6 power off
June 24, 2009
Backup support for 3 Gyro 345
configuration and G6 power off
P. 22
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
6.0 Monitoring and System Impacts
6.1 On-Orbit Validation / Monitoring
• Real-time support during all commanding and during monitoring of the VDT
6.2 System Impacts
• PCS
» Real-time support requirements
» Post-test modal analysis and EM
» Increased jitter in fly-away 345 configuration
• DMS
» Update configuration tracking matrix
• EPS, I&C, OTA, Safing, SI, TCS
» No impact
June 24, 2009
P. 23
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
6.0 Monitoring and System Impacts
6.2 System Impacts (cont’d)
• Critical Science Considerations
» No critical science overlapping VDT on DOY 176
» Pre-VDT commanding (gyro motor current limit change and G456 config) scheduled to
prevent potential interruption WFC3 observations:
• 1142101 at 175:20:00 to 175:21:04 – First external for WFC3 and is necessary before
proceeding with focus/alignment of the two cameras
• 1142401 at 176:06:10 to 176:09:28 – Start of the WFC3/UVIS focus/alignment process
» Post-VDT commanding to G345 and power off G6 scheduled to occur after critical
science observation 1142501 at 177:15:37 to 177:17:11 which is the start of the
WFC3/IR focus/alignment process
June 24, 2009
P. 24
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
7.0 Constraints and Restrictions Review
7.1 CARD
•
Gyro reconfiguration activities are performed in compliance with governing CARD items:
»
»
»
»
»
»
»
•
RGA Mode Configuration - Inertial Pointing
RGA Mode Configuration - Low Mode
RGA Power On
RGA Power Off
Entry Rates for Vehicle Control Law
Update of RGA Biases and Table Group
Termination of Experiment
The FSW code design and this procedure properly handle all activities for installation. This
procedure complies with the following CARD paragraphs:
»
»
»
»
»
»
»
•
3.1.4.1
3.1.4.2
3.1.4.10
3.1.4.11
3.1.9.14
3.1.9.15
3.1.9.19
3.1.3.1.19 HST486 Memory Access Restrictions
3.1.9.31 DIU Address Sampling
3.1.9.36 Memory Load Using STFS Type 9 Command
3.1.9.38 Telemetry Diagnostic Address Sampling
3.1.9.41 HST 486 Flight Software Background Memory Integrity Check
3.1.9.41 HST 486 Flight Software Background Memory Integrity Check Management
3.1.9.45 HST 486 Memory Load Using STFS Type 9 Command
Specify CARD compliance and/or required violations/waivers
7.2 OLD
•
June 24, 2009
Not applicable
P. 25
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
8.0 Contingency Planning
8.1 Vehicle Contingencies
• Unexpected response following FSW installation
» All FSW IPs contain back-out procedures that may be executed during backup
commanding supports.
• Loss of communication with HST
» Stand down from commanding and proceed when commanding is restored
8.2 Ground Contingencies
• Loss of communication with HST
» Stand down commanding and proceed when commanding is restored
• CCS Crash
» Switch to alternate string and proceed when commanding is restored
June 24, 2009
P. 26
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
9.0 Engineering Support Requirements
9.1 Personnel
• Test Conductor – Pat Ramsey
• On-call personnel – Debi Knapp (NASA MOM)
• PCS SE, DMS SE, Safing SE, FSW, Sys Mgmt – Support during installation and for on-orbit
R/T monitoring and validation in SMOR
• FOT in MOR
9.2 Communications / Data
• Operations Briefing prior to installation on CCL-50 prior to pre-VDT gyro config to G456
• Circuit assignments:
» CCL-50
» CCL-56
Primary circuit for Test Conductor and FOT
SE to FC circuit
• Ops Note #1860 – Transfer FSW Telemetry Update Loads to Command Queue
• FRS Requests 1756, 1757 for bias load generation and all SAC loads delivery
• Ops Requests (OR’s)
»
»
»
»
Draft OR 676 – -V1 VDT Gyro Configuration
OR # 18551 – -V1 VDT Gains & Telemetry Configuration
OR # 18552 – Load, Dump and Compare Safemode Recovery Table Load File
Draft OR # 677 – Post-VDT Gyro 345 Configuration & Gyro 6 Power Off
• Flash Reports will be issued following pre-VDT gyro configuration to G456 and following the
post-VDT gyro configuration to G345 and G6 power off
• Ops Briefing Material is available on EDOCS web site
June 24, 2009
P. 27
Ops Briefing: Post-SM4 –V1 VDT and Gyro Reconfiguration
9.0 Engineering Support Requirements
9.3 CCS Configuration
•
•
•
•
•
June 24, 2009
Prime Ops on “F" string
Back-up Ops on “D” and “H” strings
CCS Release 5.4.7.2.14
OPS PRD O007100S
FSW Loads have been transferred in accordance with AD2-04
P. 28