STIS Cycle-19 Calibration Phase-1
Last Revised:
Proposal ID:
Title:
PI:
Co-I(s):
7/25/11
12779
STIS/MAMA Recovery from Anomalous Shutdown
T. Wheeler
A. Welty
--------------------------------------------------------------------------# Orbit estimates are TOTAL for all of Cycle-19
Total Prime Orbits:
External Parallel Orbits:
Internals or no-impact orbits:
Comments on orbit estimate:
n/a
n/a
n/a
This is a contingency procedure.
--------------------------------------------------------------------------# This section should be written with a GO audience in mind -- use
# Calibration plans in WFPC-2 handbook as a guide.
Purpose: This proposal is designed to permit a safe and orderly recovery of
the FUV- or NUV-MAMA detector after an anomalous shutdown. This is
accomplished by using slower-than-normal MCP high-voltage rampings and
diagnostics.
Anomalous shutdowns can occur because of bright object violations, which
trigger the Bright Scene Detection or Software Global Monitors. Anomalous
shutdowns can also occur because of MAMA hardware problems.
Description: Anomalous shutdowns can occur because of bright object
violations, which trigger the Global Hardware Monitor or the Global Software
Monitor. Anomalous shutdowns can also occur because of MAMA hardware
anomalies or failures. The cause of the shutdown should be thoroughly
investigated and understood prior to recovery. Twenty-four hour wait
intervals are required after each test for MCP gas desorption and data
analysis. Event flags are used to prevent inadvertent MAMA usage.
The recovery procedure consists of three separate tests (i.e. visits) to
check the MAMA’s health after an anomalous shutdown. Each must be
successfully completed before proceeding onto the next. This proposal
executes the same steps as Cycle 18 proposal 12429.
(1) Signal processing electronics check. The amplifier threshold voltage is
reduced from 0.48V to 0.28V; ORCOUNTS rates are monitored (MAMA HV is
off during this procedure).
(2) Slow, intermediate voltage high-voltage ramp-up. The MCP HV is slowramped to a voltage 300V below nominal. A dark time-tag exposure is
taken during this partial ramp. A second dark accum exposure is taken
where the event counter is cycled through W, X, Y, Z, OR, EV and VE.
(3) Ramp-up to full operating voltage. As before, a dark time-tag exposure
is taken during this ramp-up. A second dark accum exposure is taken
where the event counter is cycled through W, X, Y, Z, OR, EV and VE.
This is followed by and fold analysis test (See STIS ISR 98-02R) .
Accuracy:
Comments on Accuracy:
n/a
n/a
Products:
n/a
--------------------------------------------------------------------------# Link to Cycle 19 Science
# Use the GO + GTO Phase 1 exposure listing and derived statistics
# posted on WWW.
Fraction of science programs supported by this calibration: 47% of STIS total
exposure time. This is a contingency procedure only.
List categories of science which can't be executed until after this proposal:
n/a
why:
n/a
List categories of science which are best performed contemporaneous with this
proposal:
n/a
why:
--------------------------------------------------------------------------# THE REST OF THIS FORM IS FOR INTERNAL USE
--------------------------------------------------------------------------Observation summary: The recovery from an anomalous shutdown consists of
three tests: a signal processing electronics check, high voltage ramp-up to
an intermediate voltage and a high voltage ramp-up to the full operating
voltage followed by a fold distribution test. During each of the two high
voltage ramp-ups, time-tag exposures are taken and diagnostics are performed.
Post-ramp dark accums with diagnostics follow. The final, full ramp is
followed by a fold distribution test.
# Target information (copy for each target)
Target Name.
: n/a
RA.
: n/a
Dec.
: n/a
Flux (and units).
: n/a
Visibility window (if known or relevant): n/a
Comment on choice of target
: n/a
#
#
#
#
#
#
Exposure list plan at the Phase I level. Be as complete as reasonable.
If possible information should be complete enough to allow easy
submission of a Phase 2 from this form. However, if you have to leave
some of the fields blank below, or want to provide the information
in another format, that is acceptable. (Make sure you do the BOP checking
though, as this is a phase-1 issue.)
Table of exposures (copy for each exposure as appropriate/desired):
------------------------------------------------------------------------**** This list of exposures should be executed ONLY in the event of ****
****
an anomalous FUV MAMA shutdown.
****
------------------------------------------------------------------------Note (1)
Bright Object Protection Considerations during.
(a) This proposal uses lamp/aperture/mirror combinations which are designed
to produce count rates of ~100,000-200,000 count/sec. They should not
be changed without consultation with the P.I.
(b) During the execution of the fold analysis some anode folds are
disabled. Consequently, the OR counter does not provide a true
representation of the OR count and so the Software Global Monitor (SGM)
does not trigger until the enabled folds provide enough counts to the
OR counter to trigger the SGM's threshold. To compensate, while the
fold analysis is running the SGM threshold is reduced to 150,000 counts
(130,000 counts are used due to ground system restrictions) in a 1.0
second interval, from its nominal value of 77,000 counts in a 0.1
second interval.
(c) For the reasons discussed in (b) and to prevent light from entering the
hub area, this test should only be run with the STIS external shutter
closed.
Visit 1, Exposure 1: Signal Processing Electronics Checkout - LV On
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 3600s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Sequence 1-3 Non-Int.
Switch on LV power supply.
Set SGM Threshold = 77000, Integration Period = 0.1 secs.
Set amplifier threshold to default (0.48V)- Collect a minimum of 30
telemetry points.
Set amplifier threshold to 0.28V - Collect a minimum of 300 telemetry
Points.
Special commanding: Instruction = EOHDTLV1_1.
Visit 1, Exposure 2: Signal Processing Electronics Checkout - LV Off
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 50s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Special commanding: Instruction = ROLVTHDM1.
Visit 1, Exposure 3: Signal Processing Electronics Checkout - Set Flag 2
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 10s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Special commanding: Instruction = EOFLAG2.
Visit 2, Exposure 1: Intermediate HV Checkout - Low Voltage On
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
:120s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Sequence 1-4 Non-Int.
Must clear event flag 2 for the commanding to execute
Switch on LV power supply.
Special commanding: Instruction = EOHDTLV1_2.
Visit 2 Exposure 2: Intermediate HV Checkout - Ramp HV to -1950V/-100V
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Time-Tag
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 1840s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Buffer_Time = 1800
Special Commanding
Comments:
Incrementally ramp up the detector up to 300 V below its nominal MCP
operating voltage.
A -100 volt ramp-up of the filed voltage (FV) voltage is also required
for the detection of photons.
Set SGM to Threshold = 100, Integration Period = 0.1 secs.
Collect minimum of 5 telemetry samples at each voltage.
Special commanding: Instruction = EOHV1PART2.
Visit 2, Exposure 3: Intermediate HV Checkout - Cycle SGM
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Accum
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 480s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Set SGM to Threshold = 200, Integration Period = 0.1 secs.
Collect minimum 5 samples W events.
Collect minimum 5 samples X events.
Collect minimum 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.
Special commanding: Instruction = EOHVDARK1_2.
Visit 2, Exposure 4: Intermediate HV Checkout - HV Off, LV Off, Set Flag 2
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 480s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Ramp down detector.
Set event flag 2 to prevent visit 3 from turning on the detector without
human approval.
Special commanding: Instruction = EOHV1DOWN2.
Visit 3, Exposure 1: Full High Voltage Test - Low Voltage On
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 120s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Sequence 1-7 Non-Int.
Switch on LV power supply.
Must clear event flag 2 for the commanding to execute.
Special commanding: Instruction = EOHDTLV1_3.
Visit 3, Exposure 2: Full High Voltage Test - Ramp to -2250V/-1500V
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Time-Tag
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 3350s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Buffer_Time = 1800
Special commanding
Comments:
Incrementally ramp up the detector up to its full operating
voltage.
Set SGM Threshold = 100, Integration Period = 0.1 secs.
Collect minimum of 5 telemetry samples at each voltage.
For requirements refer to TIR STIS 98-03.
Special commanding: Instruction = EOHV1PART3.
Visit 3, Exposure 3: Full High Voltage Test – Cycle SGM
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Accum
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 480s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Set SGM Threshold = 200, 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 samples Z dark events.
Collect 5 samples OR dark events.
Collect 5 samples EV dark events.
Collect 5 samples VE dark events.
Special commanding: Instruction = EOHVDARK1_3.
Visit 3, Exposure 4: Full High Voltage Test - Fold Test Setup
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 240s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
Set SGM Threshold = 15000, Integration Period = 0.1 secs.
Configure Mechanisms.
Turn on HITM2 lamp at 10mA current.
Special commanding: Instruction = EOFOLDSET1.
Visit 3, Exposure 5: Full High Voltage Test - Accum
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Accum
Spectral Element
: MIRROR
Aperture
: F25ND3
Central Wavelength
: NONE
Exposure Time
: 300s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
This image is a flat field exposure with the HITM2 using special
commanding so that the lamp remains on after the exposure.
Visit 3, Exposure 6: Full High Voltage Test - Fold Test
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: MIRROR
Aperture
: F25ND3
Central Wavelength
: n/a
Exposure Time
: 2300s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
Set SGM Threshold = 130000, Integration Period = 1.0 secs.
(a) Collect counter samples during flat field illumination
Collect 5 samples X events
Collect 5 samples Y events
(b)
(c)
(d)
(e)
(f)
(g)
(h)
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
Disable MAMA Folds: C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
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
Enable MAMA folds C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
at completion of exposure.
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 stability
Turn off HITM2 lamp
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
At completion of procedure reset SGM to nominal operating level
Special commanding: Instruction = EOFOLDTST1
Visit 3, Exposure 7: Full High Voltage Test - FUV to LV
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M1)
Operating mode
: Data
Spectral Element
: MIRROR
Aperture
: F25ND3
Central Wavelength
: n/a
Exposure Time
: 480s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
Ramp down detector.
Special commanding: Instruction = EOHV1DOWN3
------------------------------------------------------------------------**** This list of exposures should be executed ONLY in the event of ****
****
an anomalous NUV MAMA shutdown.
****
------------------------------------------------------------------------Visit 4, Exposure 1: Signal Processing Electronics Checkout - LV On
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 3600s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Sequence 1-3 Non-Int.
Switch on LV power supply.
Set SGM Threshold = 77000, Integration Period = 0.1 secs.
Set amplifier threshold to default (0.48V)- Collect a minimum of 30
telemetry points.
Set amplifier threshold to 0.28V- Collect a minimum of 300 telemetry
Points.
Special commanding: Instruction = EOHDTLV2_1
Visit 4, Exposure 2: Signal Processing Electronics Checkout - LV Off
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 50s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Special commanding: Instruction = ROLVTHDM2
Visit 4, Exposure 3: Signal Processing Electronics Checkout - Set Flag 3
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 10s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Special commanding: Instruction = EOFLAG3
Visit 5, Exposure 1: Intermediate HV Checkout - LV On
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 120s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Sequence 1-4 Non-Int.
Must clear event flag 3 for the commanding to execute.
Switch on LV power supply.
Special commanding: Instruction = EOHDTLV2_2.
Visit 5, Exposure 2: Intermediate HV Checkout - Ramp HV to -1750V/-50V
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Time-Tag
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 2070s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Buffer_Time = 1800
Special commanding
Comments:
Incrementally ramp up the detector up to 300 V below its nominal MCP
operating voltage.
A -50 volt ramp-up of the photocathode (PC) voltage is also required for
the detection of photons.
Set SGM Threshold = 1000, Integration Period = 0.1 secs.
Collect minimum of 4 telemetry samples at each voltage.
Special commanding: Instruction = EOHV2PART2
Visit 5, Exposure 3: Intermediate HV Checkout - Cycle SGM
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Accum
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 480s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Set SGM Threshold = 1000, Integration Period = 0.1 secs.
Collect minimum 5 samples W events.
Collect minimum 5 samples X events.
Collect minimum 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.
Special commanding: Instruction = EOHVDARK2_2.
Visit 5, Exposure 4: Intermediate HV Checkout - HV Off, LV Off, Set Flag 3
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 420s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Ramp down detector.
Set event flag 3 to prevent visit 4 from turning on the detector without
human approval.
Special commanding: Instruction = EOHV2DOWN2.
Visit 6, Exposure 1: Full High Voltage Test - LV On
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M2)
Operating mode
: Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Time
: 120s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : n/a, no detector HV
BOP Predicted Global Count Rate for MAMA: n/a, no detector HV
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Sequence 1-7 Non-Int.
Switch on LV power supply.
Must clear event flag 3 for the commanding to execute.
Special commanding: Instruction = EOHDTLV2_3.
Visit 6, Exposure 2: Full High Voltage Test - Ramp HV to -2050V/-700V
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Time-Tag
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 3110s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Buffer_Time = 1800
Special commanding
Comments:
Incrementally ramp up the detector up to its full operating voltage.
Set SGM Threshold = 1000, Integration Period = 0.1 secs.
Collect minimum of 4 telemetry samples at each voltage.
Special commanding: Instruction = EOHV2PART3.
Visit 6, Exposure 3: Full High Voltage Test - Cycle SGM
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: FUV MAMA (M2)
Operating mode
: Accum
Spectral Element
: DEFAULT
Aperture
: DEFAULT
Central Wavelength
: n/a
Exposure Time
: 480s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Special monitoring per ISR 98-03
BOP Predicted Global Count Rate for MAMA: Special monitoring per ISR 98-03
ETC PID IDs for Count Rates
: n/a
Special Requirements or options
: Special commanding
Comments:
Set SGM Threshold = 1000, 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 samples Z dark events.
Collect 5 samples OR dark events.
Collect 5 samples EV dark events.
Collect 5 samples VE dark events.
Special commanding: Instruction = EOHVDARK2_3.
Visit 6, Exposure 4: Full High Voltage Test - Fold Test Setup
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
:
Spectral Element
:
Aperture
:
Central Wavelength
:
Exposure Time
:
Number of Iterations
:
BOP Predicted Local Count Rate for MAMA :
BOP Predicted Global Count Rate for MAMA:
ETC PID IDs for Count Rates
:
Special Requirements or options
:
Data
n/a
n/a
n/a
240s
1
Note (1)
Note (1)
SEQ 1-3 NON-INT
Special Commanding
Comments:
Sequence 1-3 Non-Int.
Set SGM Threshold = 15000, Integration Period = 0.1 secs.
Configure Mechanisms.
Turn on HITM1 lamp at 3.8mA current.
Special commanding: Instruction = EOFOLDSET2.
Visit 6, Exposure 5: Full High Voltage Test - Accum
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Accum
Spectral Element
: MIRROR
Aperture
: F25ND3
Central Wavelength
: NONE
Exposure Time
: 120s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
This image is a flat field exposure with the HITM1 using special
commanding so that the lamp remains on after the exposure.
Visit 6, Exposure 6: Full High Voltage Test - Fold Test
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: MIRROR
Aperture
: F25ND3
Central Wavelength
: n/a
Exposure Time
: 2300s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
Set 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.
(b)
(c)
(d)
(e)
(f)
(g)
(h)
Collect 5 samples VE events.
Collect 5 samples EV events.
Collect 5 samples OR events.
Disable MAMA Folds: C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
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
Enable MAMA folds C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
at completion of exposure.
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 stability
Turn off HITM1 lamp
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
At completion of procedure reset SGM to nominal operating level
Special commanding: Instruction = EOFOLDTST2
Visit 6, Exposure 7: Full High Voltage Test - NUV to LV
Target or lamp
: Dark
Type of Acquisition
: n/a
Detector for observation
: NUV MAMA (M2)
Operating mode
: Data
Spectral Element
: MIRROR
Aperture
: F25ND3
Central Wavelength
: n/a
Exposure Time
: 360s
Number of Iterations
: 1
BOP Predicted Local Count Rate for MAMA : Note (1)
BOP Predicted Global Count Rate for MAMA: Note (1)
ETC PID IDs for Count Rates
:
Special Requirements or options
: Special Commanding
Comments:
Ramp down detector.
Special commanding: Instruction = EOHV2DOWN3
--------------------------------------------------------------------------# Special needs of this proposal?
This proposal is run to reactivate the FUV or NUV MAMA following an anomalous
shutdown.
Scheduling: As needed
Prerequisites: (e.g., specific SMOV proposal; command development?)
PDB update?
On-board table update?
(Specify table name if known e.g. SIAF).
(Specify table name if known e.g. CCDBadPixelTable)
# Special Requirements:
Real time?
Y
Special commanding?
Y
Quick Data turnaround?
Y (Engineering telemetry)
Special timing required?
N
Other?
N
Describe (& justify) special requirements: The engineering telemetry for
each step is required to evaluate the safety for proceeding.
------------------------------------------------------------------------# Analysis Plan per Anomalous Shutdown
Expected FTE weeks for analysis:
Required turnaround on analysis (weeks):
Data volume (Mb needed for analysis):
Special software needed for analysis? (Describe):
0.4
0.2 per step
n/a
none
Description of analysis Plans: (1-2 paragraphs)
Analysis is carried out by the Engineering Team within 24 hours of each test
in the checkout. The engineering telemetry data is examined (voltages,
currents, temperatures, relay position, status, and event counts) for
agreement with predicted values from previous ground and on-orbit tests or
model-predicted values.
The time-tag images are examined for unusual spatial or temporal features.
Dark and accum images are examined for unusual features, blemishes, and
defects.