Proposal 11350 (STScI Edit Number: 2, Created: Friday, September 26, 2008 8:01:06 PM EST) - Overview
Cycle: 17, Proposal Category: SM4/STIS
(Availability Mode: RESTRICTED)
INVESTIGATORS
Name
Mr. Thomas Wheeler (PI)
Dr. Ronald Pitts (CoI)
Dr. Charles R. Proffitt (CoI)
Dr. Alan D. Welty (CoI)
Dr. Olivia Lupie (CoI)
Dr. Bruce E. Woodgate (CoI)
VISITS
Visit Targets used in Visit
01 DARK
02 DARK
03 DARK
04 DARK
Institution
Space Telescope Science Institute
Space Telescope Science Institute
Computer Sciences Corporation
Space Telescope Science Institute
Space Telescope Science Institute
NASA Goddard Space Flight Center
Configurations used in Visit
S/C
S/C
STIS/FUV-MAMA
S/C
STIS/FUV-MAMA
S/C
STIS/FUV-MAMA
E-Mail pitts@stsci.edu
proffitt@stsci.edu
welty@stsci.edu
lupie@stsci.edu
Bruce.E.Woodgate@nasa.gov
Orbits Used Last Orbit Planner Run
1
1
26-Sep-2008 21:00:52.0
26-Sep-2008 21:00:56.0
2
2
26-Sep-2008 21:01:00.0
26-Sep-2008 21:01:03.0
OP Current with Visit?
yes yes yes yes
6 Total Orbits Used

Proposal 11350 (STScI Edit Number: 2, Created: Friday, September 26, 2008 8:01:06 PM EST) - Overview
ABSTRACT
This proposal addresses the concerns over Cesium migration from the FUV-MAMA photocathode into the pores of the microchannel plate and lays out the procedures necessary to permit a safe and controlled recovery of the FUV-MAMA detector to science. This procedure should only be used during the SMOV4 high voltage recommissioning phase for the FUV-MAMA. After that, the normal ramping procedure should be used. This proposal is loosly based on proposal 10036, STIS MAMA Anomalous Recovery, with the differences summarized below:
(1) additional plateaus during voltage commanding,
(2) longer dwells after each 50 V step,
(3) intermediate ramp re-structured into 2 parts,
(4) change in yellow and red limits and the MCP Hi limit, setting new values for the next plateau, and
(5) adding a fold test at 300V below the nominal MCP voltage.
The recovery consists of four separate and unique procedures (visits) and they must be completed successfully and in order.
They are:
(1) a signal processing electronics check,
(2) 1st high voltage ramp-up to an intermediate MCP voltage of -1500 V with limits modifications and voltage plateaus,
(3) 2nd high voltage ramp-up to an intermediate MCP voltage of -1950 V (300 V below the nominal MCP voltage) with limits modifications and voltage plateaus followed by a fold distribution test, and
(4) the final high voltage ramp-up to the full operating voltage, again with limits modifications and voltage plateaus, followed by a fold distribution test.
During the 1st high voltage ramp-up, diagnostics are performed followed by a dark exposure. During the 2nd and 3rd high voltage ramp-ups, diagnostics are performed followed by a dark, flat field ACCUMs, and a fold analysis test.
All required parameters are defined in 07-248 FUV and NUV SMOV Ramp-up Parameters Excel workbook.
2

Proposal 11350 (STScI Edit Number: 2, Created: Friday, September 26, 2008 8:01:06 PM EST) - Overview
Supports Activity STIS-17
OBSERVING DESCRIPTION
The procedure for the SMOV4 FUV-MAMA initial high voltage rampings consists of four procedures which are enabled for execution when the appropriate event flag has been set:
(1) Signal processing electronics check- reduce amplifier thresholds to 0.28V and monitor ORCOUNT rates [MAMA HV is off during this procedure].
(2) First intermediate high voltage ramp-up: FUV-MAMA is ramped to an MCP voltage of -1500 V; 480 sec FUV-MAMA ACCUM dark frame during which W, X, Y, Z, OR, EV and VE counters are sampled.
(3) Second intermediate high voltage ramp-up: FUV-MAMA is ramped to an MCP voltage 300 V below the nominal operating value; 480 sec for the
FUV-MAMA ACCUM dark frame during which W, X, Y, Z, OR, EV and VE counters are sampled; immediately followed by the fold analysis test.
(4) Full high voltage ramp-up; the FUV-MAMA is ramped to the nominal MCP voltage: 480 sec for the FUV-MAMA ACCUM dark frame is obtained during which events counter is cycled through W, X, Y , Z, OR, EV, VE; immediately followed by the fold analysis test.
For all of the above procedures, the STIS external shutter must be closed.
ADDITIONAL COMMENTS
Prerequisites: Successful execution of proposals 11348 and 11349.
Must not be executed until 4 D after release AND 3 D after MAMA LV cycling for SAA has started.
Visits 01 to 04 are for the SMOV4 HV recovery of the FUV-MAMA.
3

Proposal 11350 - Visit 01 - FUV MAMA HV Recovery
Proposal 11350, Visit 01, scheduling
Diagnostic Status: No Diagnostics
Scientific Instruments: S/C
Special Requirements: GYRO MODE 3GOBAD
Comments: FUV-MAMA signal processing electronics checkout procedure. Refer to ISR STIS 98-03. Must clear event flag 2 for the commanding to execute.
# Label Target Config,Mode,Aperture Spectral Els.
Opt. Params.
Special Reqs.
Groups
1 FUV ChgA mp 0.28V
DARK S/C, DATA, NONE SAA CONTOUR 25; Same Alignment
SPEC COM INSTR
EOCHAMP28V1;
QASISTATES STIS
SI OPERATE OPER
ATE;
QASISTATES STIS
MA1 HOLD HOLD;
QASISTATES STIS
MA2 HOLD HOLD;
QASISTATES OMC
E SI HOLD HOLD
Comments: Set charge amplifier threshold to 0.28V. Collect a minimum of 300 telemetry points.
2 FUV ChgA mp 0.48V
DARK S/C, DATA, NONE SAA CONTOUR 25;
SPEC COM INSTR
EOCHAMP48V1
Same Alignment
Comments: Set the charge amplifier threshold to 0.48 Volts. (Transition to nominal low voltage state.)
3 Set STIS fla g 2
DARK S/C, DATA, NONE SAA CONTOUR 25;
SPEC COM INSTR
EOFLAG2
Same Alignment
Comments: Set event flag 2 to prevent visit 2 from turning on the detector without approval.
25.0 Secs
[==>]
1.0 Secs
[==>]
Sat Sep 27 01:01:06 GMT 2008
Exp. Time/[Actual Dur.]
3025.0 Secs
[==>]
Orbit
[1]
[1]
[1]
4

Proposal 11350 - Visit 01 - FUV MAMA HV Recovery
5

Proposal 11350 - Visit 02 - FUV MAMA HV Recovery
Proposal 11350, Visit 02, scheduling
Diagnostic Status: No Diagnostics
Scientific Instruments: STIS/FUV-MAMA, S/C
Special Requirements: GYRO MODE 3GOBAD; AFTER 01 BY 24.0 H TO 36.0 H
Sat Sep 27 01:01:07 GMT 2008
Comments: Minimum wait of 24 hours following signal processing test (Visit 01). Must clear event flag 2 for the commanding to execute. Exposures 1-3: FUV-MAMA 1st intermediate voltage to -1500 V checkout procedure. Goal: 1) Ramp FUV-MAMA to 1st intermediate MCP voltage 2) obtain dark count telemetry. Refer to ISR STIS 98-03.
Data to PI within 20 hours of visit completion.
# Label
1 FUV Ramp
1 to -1500
Target
DARK
Config,Mode,Aperture
STIS/FUV-MAMA, TIME-TAG,
DEF
Spectral Els.
DEF
Opt. Params.
BUFFER-TIME=24
00
Special Reqs.
SPEC COM INSTR
EOLVTHV1_2;
Groups Exp. Time/[Actual Dur.]
2050.0 Secs
Orbit
[==>]
QASISTATES STIS
MA1 HOLD HVON
[1]
Comments: See 07-248 FUV and NUV SMOV Ramp-up Parameters Excel workbook for all parameter values. Install memory monitors for CS limit checking (addresses in the Parameters workbook). Use memory moni tors 5H for MCP voltage and 6H for MCP current. Set the CS limit checking MCP voltage and MCP current values (see Parameters workbook for values ) for each plateau of -500 V, -1000 V, and -1500 V prior to ra mping to that plateau. Incrementally ramp up the detector in 50 V steps to each plateau (see Parameters workbook for ramping parameter values). At each plateau, set Software Global Monitor to the appropiate count s/sec for that plateau (see Parameters workbook for SGM values). Collect minimum of 5 telemetry samples at each plateau. For additional information refer to ISR STIS 98-03.
2 FUV Ramp
1 telemetry
3 FUV to LVo n
DARK STIS/FUV-MAMA, ACCUM, DEF DEF SPEC COM INSTR
EOHVDARK1_2
SAA CONTOUR 25; Same Alignment
[1]
Comments: During the accum: Set Software Global monitor (SGM) SGM Threshold = 2000 SGM Integration period = 0.1 secs Collect minimum 5 samples W events Collect minimum 5 samples X events Collect minim um 5 samples Y events Collect minimum 5 samples Z events Collect minimum 5 samples OR events Collect minimum 5 samples EV events Collect minimum 5 samples VE events.
DARK S/C, DATA, NONE
SPEC COM INSTR
EOHVTLV1_2;
480.0 Secs
[==>]
300.0 Secs
[==>]
;
NEW ALIGNMENT
QASISTATES STIS
SI OBSERVE OBSE
RVE;
QASISTATES STIS
MA1 HVON HOLD;
QASISTATES OMC
E SI HOLD HOLD
[1]
Comments: Ramp down detector voltage. This procedure uses special commanding.
ISQL will be needed to reset the STIS MA1 qasi_states to HOLD/HOLD for the HOME alignment at the end of this obset.
4 Set STIS fla g 2
DARK S/C, DATA, NONE SPEC COM INSTR
EOFLAG2
Same Alignment
Comments: Set event flag 2 to prevent visit 3 from turning on the detector without approval.
1.0 Secs
[==>] [1]
6

Proposal 11350 - Visit 02 - FUV MAMA HV Recovery
7

Proposal 11350 - Visit 03 - FUV MAMA HV Recovery
Proposal 11350, Visit 03, scheduling
Diagnostic Status: No Diagnostics
Scientific Instruments: STIS/FUV-MAMA, S/C
Special Requirements: GYRO MODE 3GOBAD; AFTER 02 BY 36.0 H TO 48.0 H
Sat Sep 27 01:01:08 GMT 2008
Comments: Minimum wait of 36 hours following the 1st intermediate voltage ramp (Visit 02). Must clear event flag 2 for the commanding to execute. Exposures 1-3: FUV-MAMA 2nd intermediate ramp-up + checkout procedure. Goal: 1) Ramp FUV-MAMA to 2nd intermediate MCP voltage 2) obtain dark count telemetry. Exposures 4-6: FUV-MAMA fold analysis.
Data to PI within 20 hours of visit completion.
# Label
1 FUV Ramp
2 to -1950
Target
DARK
Config,Mode,Aperture
STIS/FUV-MAMA, TIME-TAG,
DEF
Spectral Els.
DEF
Opt. Params.
BUFFER-TIME=36
00
Special Reqs.
SPEC COM INSTR
EOLVTHV1_3;
Groups Exp. Time/[Actual Dur.]
3600.0 Secs
Orbit
[==>]
QASISTATES STIS
MA1 HOLD HVON
[1]
Comments: See 07-248 FUV and NUV SMOV Ramp-up Parameters Excel workbook for all parameter values. Install memory monitors for CS limit checking (addresses in Parameters workbook). Use memory monitors
5H for MCP voltage and 6H for MCP current. Set the CS limit checking MCP voltage and MCP current values (from Parameters workbook) for each plateau of -500 V, -1000 V, -1500 V, and -1950 V (300 V below no minal) prior to ramping to that plateau. Incrementally ramp up the detector in 50 V steps to each plateau (see Parameters workbook for ramping parameter values). At each plateau, set Software Global Monitor to the appropiate counts/sec for that plateau (again, see Parameters workbook for SGM values). Collect minimum of 5 telemetry samples at each plateau. Ramp the Field Voltage to the plateaus of -100 V and -1500 V incre mentally in 50 V steps (see Parameters workbook for Field Voltage ramping values). At each Field Voltage plateau, set Software Global Monitor to the appropiate counts/sec for that plateau (see Parameters workboo k for SGM values). For additional information refer to ISR STIS 98-03.
2 FUV Ramp
2 telemetry
3 FUV Fold T est Setup
DARK
DARK
STIS/FUV-MAMA, ACCUM, DEF
S/C, DATA, NONE
DEF SPEC COM INSTR
EOHVDARK1_3
SPEC COM INSTR
EOFOLDSET1
Same Alignment
480.0 Secs
[==>]
Comments: Set Software Global monitor (SGM) SGM Threshold = 200 SGM Integration period = 0.1 secs. Collect 5 samples W dark events Collect 5 samples X dark events Collect 5 samples Y dark events Collect 5 s amples Z dark events Collect 5 samples OR dark events Collect 5 samples EV dark events Collect 5 samples VE dark events. This exposure should be followed by immediately a fold analysis.
240.0 Secs
[==>]
[1]
[1]
Comments: Set Software Global monitor (SGM) SGM Threshold = 15000 SGM Integration period = 0.1 secs Configure mechanisms. Turn on HITM2 lamp at 10 mA current.
4 ACCUM DARK STIS/FUV-MAMA, ACCUM, DEF DEF Same Alignment 300.0 Secs
[==>]
Comments: The HITM2 lamp is on throughout this exposure activity, and stays on for the Fold Test that follows.
[1]
8

Proposal 11350 - Visit 03 - FUV MAMA HV Recovery
# Label
5 FUV Fold T est
Target
DARK
Config,Mode,Aperture
S/C, DATA, NONE
Spectral Els.
Opt. Params.
Special Reqs.
SPEC COM INSTR
EOFOLDTST1
Groups
Same Alignment
Comments: Flat field details Aperture F25ND3 Sp_Element MIRROR Set Software Global monitor (SGM SGM Threshold = 130000 SGM Integration period = 1.0 secs
(a) Collect counter samples during flat field illumination
Collect 5 samples X events
Collect 5 samples Y events
Collect 5 samples Z events
Collect 5 samples W events
Collect 5 samples VE events
Collect 5 samples EV events
Collect 5 samples OR events
(b) Disable MAMA Folds: C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
(c) Conduct fold analysis
Collect 5 samples VE for following 19 combinations of MAMA folds:
(1) Enabled: C2, R2; Disabled: C3, C4, C5, C6, R3, R4, R5, R6
(2) Enabled: C2, R3; Disabled: C3, C4, C5, C6, R2, R4, R5, R6
(3) Enabled: C3, R2; Disabled: C2, C4, C5, C6, R3, R4, R5, R6
(4) Enabled: C2, R4; Disabled: C3, C4, C5, C6, R2, R3, R5, R6
(5) Enabled: C3, R3; Disabled: C2, C4, C5, C6, R2, R4, R5, R6
(6) Enabled: C4, R2; Disabled: C2, C3, C5, C6, R3, R4, R5, R6
(7) Enabled: C3, R4; Disabled: C2, C4, C5, C6, R2, R3, R5, R6
(8) Enabled: C4, R3; Disabled: C2, C3, C5, C6, R2, R4, R5, R6
(9) Enabled: C3, R5; Disabled: C2, C4, C5, C6, R2, R3, R4, R6
(10) Enabled: C4, R4; Disabled: C2, C3, C5, C6, R2, R3, R5, R6
(11) Enabled: C5, R3; Disabled: C2, C3, C4, C6, R2, R4, R5, R6
(12) Enabled: C4, R5; Disabled: C2, C3, C5, C6, R2, R3, R4, R6
(13) Enabled: C5, R4; Disabled: C2, C3, C4, C6, R2, R3, R5, R6
(14) Enabled: C4, R6; Disabled: C2, C3, C5, C6, R2, R3, R4, R5
(15) Enabled: C5, R5; Disabled: C2, C3, C4, C6, R2, R3, R4, R6
(16) Enabled: C6, R4; Disabled: C2, C3, C4, C5, R2, R3, R5, R6
(17) Enabled: C5, R6; Disabled: C2, C3, C4, C6, R2, R3, R4, R5
(18) Enabled: C6, R5; Disabled: C2, C3, C4, C5, R2, R3, R4, R6
(19) Enabled: C6, R6; Disabled: C2, C3, C4, C5, R2, R3, R4, R5
(d) Enable MAMA folds C2, C3, C4, C5, C6, R2, R3, R4, R5, R6 at completion of exposure.
(e) Check lamp stability by checking EV and VE
Collect 5 samples events (EV) to check lamp stability
Collect 5 samples Valid Events (VE) to check lamp s tability
(f) Turn off HITM2 lamp
(g) Collect event counter data for detector dark count rate
Collect 5 samples X dark events
Collect 5 samples Y dark events
Collect 5 samples Z dark events
Collect 5 samples W dark events
Collect 5 samples VE dark events
Collect 5 samples EV dark events
Collect 5 samples OR dark events
(h) At completion of procedure reset SGM to nominal operating level.
Exp. Time/[Actual Dur.]
2300.0 Secs
[==>]
Orbit
[1]
9

Proposal 11350 - Visit 03 - FUV MAMA HV Recovery
# Label
6 FUV to LVo n
Target
DARK
Config,Mode,Aperture
S/C, DATA, NONE
Spectral Els.
Opt. Params.
Special Reqs.
Groups
SAA CONTOUR 25; Same Alignment
SPEC COM INSTR
EOHVTLV1_3;
;
NEW ALIGNMENT
QASISTATES STIS
SI OBSERVE OBSE
RVE;
QASISTATES STIS
MA1 HVON HOLD;
QASISTATES OMC
E SI HOLD HOLD
Comments: Ramp down detector voltages. This procedure uses special commanding.
ISQL will be needed to reset the STIS MA1 qasi_states to HOLD/HOLD for the DUMP and HOME alignments at the end of this obset.
7 Set STIS fla g 2
DARK S/C, DATA, NONE SPEC COM INSTR
EOFLAG2
Same Alignment
Comments: Set event flag 2 to prevent visit 4 from turning on the detector without approval.
Exp. Time/[Actual Dur.]
480.0 Secs
[==>]
1.0 Secs
[==>]
Orbit
[2]
[2]
10

Proposal 11350 - Visit 03 - FUV MAMA HV Recovery
11

Proposal 11350 - Visit 04 - FUV MAMA HV Recovery
Proposal 11350, Visit 04, scheduling
Diagnostic Status: No Diagnostics
Scientific Instruments: STIS/FUV-MAMA, S/C
Special Requirements: GYRO MODE 3GOBAD; AFTER 03 BY 36.0 H TO 48.0 H
Sat Sep 27 01:01:08 GMT 2008
Comments: Minimum wait of 36 hours following the 2nd intermediate voltage ramp (Visit 03). Must clear event flag 2 for the commanding to execute. Exposures 1-3: FUV full HV ramp-up + checkout procedure.
Goal: 1) Ramp FUV-MAMA to full MCP voltage 2) obtain dark count telemetry. Exposures 4-6: FUV-MAMA fold analysis. Refer to ISR STIS 98-03. These exposures leave flag 2 CLEAR.
To allow time for analysis of the fold data,
NO OTHER FUV MAMA OBSERVATIONS SHOULD BE SHCEDULED WITHIN 24 HOURS AFTER THIS PROGRAM.
Data to PI within 20 hours of visit completion.
# Label Target
1 FUV Ramp t o -2250
DARK
Config,Mode,Aperture
STIS/FUV-MAMA, TIME-TAG,
DEF
Spectral Els.
DEF
Opt. Params.
BUFFER-TIME=45
00
Special Reqs.
SPEC COM INSTR
EOLVTHV1_4;
Groups Exp. Time/[Actual Dur.]
4200.0 Secs
Orbit
[==>]
QASISTATES STIS
MA1 HOLD HVON
[1]
Comments: See 07-248 FUV SMOV Ramp-up Parameters Excel workbook for all parameter values. Install memory monitors for CS limit checking (addresses in the Parameters workbook). Use memory monitors 5H fo r MCP voltage and 6H for MCP current. Set the CS limit checking MCP voltage and MCP current values (from Parameters workbook) for each plateau of -500 V, -1000 V, -1500 V, and -2050 V prior to ramping to th at plateau. Incrementally ramp up the detector in 50 V steps to each plateau (see Parameters workbook for ramping values). At each plateau, set Software Global Monitor to the appropiate counts/sec for that plateau
(see Parameters workbook for SGM values). Collect minimum of 5 telemetry samples at each plateau. Ramp the Field Voltage to plateau of -100 V incrementally in 50 V steps (see Paramaters workbook for ramping v alues). Set the Software Global Monitor to the appropiate counts/sec for that plateau (see Parameters workbook for SGM values). Next, finish ramping the MCP. Set the CS limit checking MCP voltage and MCP curre nt values (from Parameters workbook) for each plateau of -2150 V and -2250 V prior to ramping to that plateau. Incrementally ramp up the detector in 50 V steps to each plateau (see Parameters workbook for rampi ng values). At each plateau, set Software Global Monitor to the appropiate counts/sec for that plateau (see Parameters workbook for SGM values). Collect minimum of 5 telemetry samples at each plateau. Finally, fini sh ramping the Field Voltage to -1500V using the Parameters workbook ramping parameters. Set the Software Global Monitor to the appropiate counts/sec for that plateau (see the Parameters workbook for SGM val ues). Collect minimum of 5 telemetry samples at each plateau. For additional information refer to ISR STIS 98-03.
2 FUV Ramp t elemetry
3 FUV Fold T est Setup
DARK
DARK
STIS/FUV-MAMA, ACCUM, DEF
S/C, DATA, NONE
DEF SPEC COM INSTR
EOHVDARK1_4
SPEC COM INSTR
EOFOLDSET1
Same Alignment
480.0 Secs
[==>]
Comments: Set Software Global monitor (SGM) SGM Threshold = 200 SGM Integration period = 0.1 secs Collect 5 samples W dark events Collect 5 samples X dark events Collect 5 samples Y dark events Collect 5 sa mples Z dark events Collect 5 samples OR dark events Collect 5 samples EV dark events Collect 5 samples VE dark events. This exposure should be followed by immediately a fold analysis.
240.0 Secs
[==>]
[1]
[1]
Comments: Set Software Global monitor (SGM) SGM Threshold = 15000 SGM Integration period = 0.1 secs Configure mechanisms Turn on HITM2 lamp at 10 mA current.
4 ACCUM DARK STIS/FUV-MAMA, ACCUM, DEF DEF Same Alignment 300.0 Secs
[==>]
Comments: The HITM2 lamp is on throughout this exposure activity, and stays on for the Fold Test that follows.
[1]
12

Proposal 11350 - Visit 04 - FUV MAMA HV Recovery
# Label
5 FUV Fold T est
Target
DARK
Config,Mode,Aperture
S/C, DATA, NONE
Spectral Els.
Opt. Params.
Special Reqs.
SPEC COM INSTR
EOFOLDTST1
Groups
Same Alignment
Comments: Flat field details Aperture F25ND3 Sp_Element MIRROR Set Software Global monitor (SGM SGM Threshold = 130000 SGM Integration period = 1.0 secs
(a) Collect counter samples during flat field illumination
Collect 5 samples X events
Collect 5 samples Y events
Collect 5 samples Z events
Collect 5 samples W events
Collect 5 samples VE events
Collect 5 samples EV events
Collect 5 samples OR events
(b) Disable MAMA Folds: C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
(c) Conduct fold analysis
Collect 5 samples VE for following 19 combinations of MAMA folds:
(1) Enabled: C2, R2; Disabled: C3, C4, C5, C6, R3, R4, R5, R6
(2) Enabled: C2, R3; Disabled: C3, C4, C5, C6, R2, R4, R5, R6
(3) Enabled: C3, R2; Disabled: C2, C4, C5, C6, R3, R4, R5, R6
(4) Enabled: C2, R4; Disabled: C3, C4, C5, C6, R2, R3, R5, R6
(5) Enabled: C3, R3; Disabled: C2, C4, C5, C6, R2, R4, R5, R6
(6) Enabled: C4, R2; Disabled: C2, C3, C5, C6, R3, R4, R5, R6
(7) Enabled: C3, R4; Disabled: C2, C4, C5, C6, R2, R3, R5, R6
(8) Enabled: C4, R3; Disabled: C2, C3, C5, C6, R2, R4, R5, R6
(9) Enabled: C3, R5; Disabled: C2, C4, C5, C6, R2, R3, R4, R6
(10) Enabled: C4, R4; Disabled: C2, C3, C5, C6, R2, R3, R5, R6
(11) Enabled: C5, R3; Disabled: C2, C3, C4, C6, R2, R4, R5, R6
(12) Enabled: C4, R5; Disabled: C2, C3, C5, C6, R2, R3, R4, R6
(13) Enabled: C5, R4; Disabled: C2, C3, C4, C6, R2, R3, R5, R6
(14) Enabled: C4, R6; Disabled: C2, C3, C5, C6, R2, R3, R4, R5
(15) Enabled: C5, R5; Disabled: C2, C3, C4, C6, R2, R3, R4, R6
(16) Enabled: C6, R4; Disabled: C2, C3, C4, C5, R2, R3, R5, R6
(17) Enabled: C5, R6; Disabled: C2, C3, C4, C6, R2, R3, R4, R5
(18) Enabled: C6, R5; Disabled: C2, C3, C4, C5, R2, R3, R4, R6
(19) Enabled: C6, R6; Disabled: C2, C3, C4, C5, R2, R3, R4, R5
(d) Enable MAMA folds C2, C3, C4, C5, C6, R2, R3, R4, R5, R6 at completion of exposure.
(e) Check lamp stability by checking EV and VE
Collect 5 samples events (EV) to check lamp stability
Collect 5 samples Valid Events (VE) to check lamp s tability
(f) Turn off HITM2 lamp
(g) Collect event counter data for detector dark count rate
Collect 5 samples X dark events
Collect 5 samples Y dark events
Collect 5 samples Z dark events
Collect 5 samples W dark events
Collect 5 samples VE dark events
Collect 5 samples EV dark events
Collect 5 samples OR dark events
(h) At completion of procedure reset SGM to nominal operating level.
Exp. Time/[Actual Dur.]
2300.0 Secs
[==>]
Orbit
[1]
13

Proposal 11350 - Visit 04 - FUV MAMA HV Recovery
# Label
6 FUV to LVo n
Target
DARK
Config,Mode,Aperture
S/C, DATA, NONE
Spectral Els.
Opt. Params.
Special Reqs.
SAA CONTOUR 25;
Groups
SPEC COM INSTR
EOHVTLV1_4;
;
NEW ALIGNMENT
QASISTATES STIS
SI OBSERVE OBSE
RVE;
QASISTATES STIS
MA1 HVON HOLD;
QASISTATES OMC
E SI HOLD HOLD
Comments: Ramp down detector voltages. This procedure uses special commanding.
ISQL will be needed to reset the STIS MA1 qasi_states to HOLD/HOLD for the DUMP and HOME alignments at the end of this obset.
Exp. Time/[Actual Dur.]
480 Secs
[==>]
Orbit
[2]
14

Proposal 11350 - Visit 04 - FUV MAMA HV Recovery
15