COS Cycle
-
21
Calibration Phase
-
1
Last Revised:
11/01
/
13
Proposal ID:
13533
Title:
COS
NUV
MAMA
Recovery after Anomalous Shutdown
PI:
T. Wheeler
Co
-
I(s):
A. Welty
---------------------------------------------------------------------------
# Orbit
estimates are TOTAL for all of C
ycle
-
21
Total
Prime Orbits: n/a
External Parallel Orbits:
n/a
I
nternals or no
-
impact orbits: n/a
Comments on orbit estimate:
This is a contingency proposal only.
---------------------------------------------------------------------------
# This section should be written with a GO audience in mind
--
use
# Calibrat
ion plans in WFPC
-
2 handbook as a guide.
Purpose: This proposal is designed to permit the safe
and orderly recovery of
the COS/NUV
MAMA detector after an anomalous shutdown. This is accomplished
by using slower
-
than
-
normal MCP
and PC
high
-
voltage ramp
-
ups
and diagnostics.
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.
COS event flag 2 i
s
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
exec
utes the same
steps as Cycle 20 proposal 13129
.
(1) Signal processing electronics check. This reduces amplifier thresholds
to 0.28V and monitors the ORCOUNT rate. (MAMA HV is off during this
procedure)
(2)
Slow
, intermediate
voltage
HV
ramp
-
up. The
MCP and PC are
slow
-
ramped
with plateaus
to a
MCP
voltage 300V below nominal
and a PC voltage of
-
50V
.
A
dark time
-
tag exposure is taken during this partial ramp. A
second
time
-
tag
dark exposure is taken where the event coun
ter is cycled
through W, X, Y, Z, OR, EV and VE
(3)
Slow, full voltage
HV
ramp
-
up
.
The MCP and PC are slow
-
ramped with
plateaus to the full MCP and PC
operating
voltages.
As before, a dark
time
-
tag exposure is taken
during the ramp. A se
cond dark time
-
tag
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 COS
MAMA
Fold Distribution
for details
)
.
Accuracy: n/a
Comments on Accuracy:
n/a
Products:
n/a
---------------------------------------------------------------------------
# Link to c
ycle 21
Science
# Use the GO + GTO Phase 1 exposure listing and derived statistics
# posted on W
WW.
Fraction of science programs supported by this calibration: This is a
contingency procedure only.
List categories of science which can't be executed until after this proposal:
n/a
why: n/a
L
ist 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 pro
cessing electronics check, high
-
voltage ramp
-
up to
an
intermediate voltage and a h
igh
-
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 time
-
tags with diagnostics are also taken. 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 unit
s). : 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 al
low 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.)
-------------------------------------------------------------------------
**** This list of exposures should be executed ONLY in the event of ****
****
an anomalous
COS/NUV MAMA shutdown
****
-------------------------------------------------------------------------
Note (1)
Bright Object Protection Considerations during the Visit 3 and Visit 6.
(a)
This proposal uses aperture/grating/lamp combinations which are
designed to produce count rate
s of ~1,000
-
2,000 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
representati
on 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 th
e SGM thre
shold is reduced to 1
0,000 counts
in a 1.0 second interv
al, from its nominal value of 20,000 counts in a
0.1 second interval.
(c) For the reasons discussed in (b) and to prevent light from entering the
hub this test
should only be ru
n with the COS
external shutter closed.
Note (2)
Voltage ramping terms and polarity terminology.
With the COS NUV MAMA detector, the term ramp
-
up means to make the MCP or PC
more negative in applied voltage. Ramping down means heading towards 0V.
Table
of exposures (copy for each exposure as appropriate/desired):
Visit 1
, Exposure 1: Signal Processing Electronics Checkout
-
LV On
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n
: COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture : n/a
Central Wavelength : n/a
Exposure Time
: 1005s
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:
Same alignment Sequence 1
-
3
.
Switch on LV power supply
.
Set
SGM Threshold = 10
000, Integration
Period
= 0.1 secs
.
Set amplifier threshold to default (0.48V)
-
Collect a minimum of 30
telemetry points
.
S
et amplifier threshold to
0.28V
-
Collect a minimum of 30
telemetry
Points.
Special commanding: Instruction =
ELHDTLVN_1
.
Visit 1
, Exposure 2: Signal Processing Electronics Checkout
-
LV Off
Target or lamp : Dark
Type of
Acquisition : n/a
Detector for observatio
n
: COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture
: n/a
Central Wavelength
: n/a
Exposure Ti
me : 3
0s
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 Req
uirements or options :
Special commanding
Comments:
Special commanding: Instruction =
RLLVTHDN
.
Visit 1
, Exposure 3: Signal Processing E
lectronics Checkout
-
Set Flag 2
Target or lamp
: Dark
Type of Acquisition : n/a
Detector for observatio
n :
COS/NUV
Operating mode : Data
Spectral Elem
ent : n/a
Aperture
: n/a
Central Wavel
ength : n/a
Exposure Tim
e : 1
s
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 ID
s for Count Rates : n/a
Special Requirements or options : Special commanding
Comments:
Special commanding: Instruction =
ELFLAG2
.
Visit 2
, Exposure 1: Intermediate HV Checkout
-
LV On
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture : n/a
Central Wavelength
: n/a
Exposure Time
: 60
s
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 I
SR 98
-
03
ETC PID IDs for Count Rates : n/a
Special Requirements or options : Special commanding
Comments:
Sequence 1
-
6
Non
-
Int.
Must clear event flag 2
for the commanding to execute.
Switch on LV power supply.
Special
commanding: Instruction =
ELHDTLVN_2
.
Visit 2
, Exposure 2: Intermediate HV Checkout
-
Ramp HV to
-
1750V/
-
50V
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Op
erating mode : Time
-
Tag
Spectral Elemen
t : Default
Aperture
: Default
Central Wavelength : n/a
Exposure Time
: 1800
s
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 op
tions : Buffer
Time = 20
00
Special commanding
Comments:
The MCP and PC Voltage partial Ramp
-
ups will be performed in stages. The
ramp
-
up within a stage is by increments of
-
50V. The final MCP volta
ge
will be
-
1750V, 300V shy of the nominal value of
-
2050V. The final PC
Voltage will be
-
50V, rather than the nominal
-
800V setting. Use the
nominal yellow and red ramping
limits
. At the end of each stage,
reset
the SGM to a Threshold
= 100 and an Integration Period = 0.1 sec,
and
collect telemetry samples of OR Counts for 4 minutes. The COS rate is 1
TLM sample/10 secs; ~24 samples will be obtained.
Stage 1
-
MCP
ramp
-
up (0 to
-
500V)
Stage 2
-
MCP ramp
-
up
(
-
50
0V to
-
1000V)
Stage 3
-
MCP
ramp
-
up (
-
1000V to
-
1500V)
Stage 4
-
MCP
ramp
-
up (
-
1500V to
-
1750V)
Stage 5
-
PC V
oltage ramp
-
up (+20 to
-
50V)
Special commanding: Instruction =
ELHVPART2
.
Visit 2
, Exposure 3: Intermediate HV
Checkout
-
Cycle SGM
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n
: COS/NUV
Operating mode
: Time
-
T
ag
Spectral Element
:
Default
Aperture
: Default
Central Wavelength : n/a
Exposure Time
: 570
s
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 = 720
Special
commanding
Comments:
S
et SGM Threshold = 2
00
, 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 =
ELHVDARK2
.
Visit
2
, Exposure 4: Intermediate HV Check
out
-
HV Off
Target or lamp
: Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture
: n/a
Ce
ntral Wavelength : n/a
Exposure Time
: 250
s
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
Com
ments:
Ramp down detector.
Special commanding: Instruction =
ELHVTLVN_2
.
Visit 2, Exposure 5:
Intermediate HV Checkout
-
LV Off
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operating mode : Data
Spectral Element
: n/a
Aperture
: n/a
Central Wavelength : n/a
Exposure Time
: 30s
Number of Iterations : 1
BOP Predicted Local Count Rate for MAMA :
n/a
BOP Predicted
Global Count Rate for MAMA:
n/a
ETC PID IDs for Count Rates : n/a
Special Requirements or options : Special commanding
Comments:
Turn LV off
.
Special commanding: Instruction =
RLLVTHDN
.
Visit 2, Exposu
re 6: Intermediate HV
Checkout
-
Set Flag 2
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operating mode : Data
Spectral Element :
n/a
Aperture
: n/a
Central Wavelength : n/a
Exposure Time
: 1s
Number of Iterations : 1
BOP Predicted Local Count Rate for MAMA :
n/a
BOP Predicted Global Coun
t Rate for MAMA:
n/a
ETC PID IDs for Count Rates : n/a
Special Requirements or options : Special commanding
Comments:
Set Flag 2
.
Special commanding: Instruction =
ELFLAG2
.
Visit 3
, Exposure 1: Full High Voltage Test
-
LV On
Ta
rget or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n
: COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture
: n/a
Central Wavelength : n/a
Exposure Time
: 60
s
Number of Iterations : 1
BOP Predicted Local Count Rat
e for MAMA : n/a
BOP Predicted Global Count R
ate for MAMA:
n/a
ETC PID IDs for Count Rates : n/a
Special Requirements or options : Special commanding
Comments:
Sequence 1
-
6
Non
-
Int.
Switch on LV power supply
.
Must clear event flag 2
for the commanding to execute
.
S
pecial commanding: Instruction =
ELHDTLVN_3
.
Visit 3
, Exposure 2: Full High Vol
tage Test
-
Ramp HV to
-
2050V/
-
8
00V
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observ
ation :
COS/NUV
Operating mode : Time
-
Tag
Spectral Element
: Default
Aperture
: Default
Central Wavelength : n/a
Exposure Time
: 3090
s
Num
ber 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 op
tions : Buffer_Time = 33
00
Special commanding
Comments:
Special NUV HV turn on & slow full ramp up. The MCP and Field Voltage
Ramp
-
ups will be performed in stages. The ramp
-
up wit
hin a stage is by
increments of 50V. Use the nominal yellow and red limits for ramping. At
the end of each stage, reset the SGM to a Threshold = 100 and an
Integration Period = 0.1 sec, an
d collect telemetry samples of OR
Counts
for 4 m
inutes. The COS rate is 1 TLM sample/10 secs; ~24 samples will be
obtained.
Stage 1
-
MCP
ramp
-
up (0 to
-
500V)
Stage 2
-
MCP
ramp
-
up (
-
500V to
-
1000V)
Stage 3
-
MCP
ramp
-
up (
-
1000V to
-
1500V)
Stage 4
-
MCP
ramp
-
up
(
-
1500V to
-
1750V)
Stage 5
-
PC V
oltage ramp
-
up (+20 to
-
50V)
Stage 6
-
MCP
ramp
-
up (
-
1750V to
-
1850V)
Stage 7
-
MCP
ramp
-
up (
-
1850V to
-
1950V)
Stage 8
-
Fina
l MCP ramp
-
up (
-
1950V to
-
2050V)
Stage 9
-
Final PC Voltage
ramp
-
up (
-
50V t
o
-
800V)
Special commanding: Instruction =
ELHVPART3
.
Visit 3
, Exposure 3: Full High Voltage Test
-
Cycle SGM
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n
: COS/NUV
Operating mode
: Time
-
T
ag
Spectral Element
: Default
Aperture
: Default
Central Wavelength : n/a
Exposure Time
: 45
0s
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 = 720
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 =
ELHVDARK3
.
Visit
3
,
Exposure 4: Intermediate HV Checkout
-
HV Off
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operating mode : Data
Spectral Element
: n/a
Aperture
: None
Central Wavelength : n/a
Exposure Time
: 355
s
Number of Iterations : 1
BOP Predicted Local Count Rate for MAMA : Spec
ial 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,
HV off
.
Special commanding: Instruction =
ELHVTLVN_3
.
Visit
3
, Exposure 5: Intermediate HV Checkout
-
LV Off
Target or lamp : Dark
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operati
ng mode : Data
Spectral Element : n/a
Aperture : n/a
Central Wavelength : n/a
Exposure Time
: 30s
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 : Specia
l commanding
Comments:
Turn LV off
.
Special commanding:
Instruction =
RLLVTHDN
.
Visit
3
, Exposu
re 6: Intermediate HV Checkout
-
Set Flag 2
Target or lamp : Dark
Type of Acquisition : n/a
Detector for ob
servatio
n : COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture
: None
Central Wavelength : n/a
Exposure Time
: 1s
Number of Iterations : 1
BOP Predicted Local Count Rate for MAMA :
n/a
BOP Predicted Global Count Rate for MAMA:
n/a
ETC PID IDs for Count Rates : n/a
Special Requirements or options :
Special commanding
Comments:
Set Flag 2
.
Special commanding: Instruction =
ELFLAG2
.
Visit 4, Exposure 1
: Full High Voltage Test
-
Fold Test Setup
Target or lamp : Dark
Type of Acquisition : n/a
Detector
for observatio
n : COS/NUV
Operating mode : Data
Spectral Element : n/a
Aperture : n/a
Central Wavelength : n/a
Exposure Tim
e
: 2
0s
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 Requireme
nts or options
:
Special
Commanding
Comments:
Sequence 1
-
2 Same
-
Alignment.
Set SGM Threshold =
15000, Integration Period = 0.1
s
ecs.
Special commanding: Instruction =
ELFOLDSET
.
Visit 4, Exposure 2
: Full High Voltage Test
-
Fold Test
Target or lamp
: D2
-
Medium
Type of Acquisition : n/a
Detector for observatio
n : COS/NUV
Operating mode
: Time
-
Tag
Spectral Element
: G185M
Aperture
: FCA
Central Wavel
ength : 1850
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 :
Buffer Time = 2300
Special
c
ommanding
Co
mments:
Set SGM Threshold = 10
,
0
00
, Integration
Period
= 1.0
secs
(a) Collect counter samples during flat field illumination
Collect 60 sec
W
events
Collect 60 sec
X
events
Collect 60 sec
Y
events
Collect 60 sec
Z
events
Collect 60 sec
OR
events
Collect 60 sec
EV events
Collect 60 sec
VE
events
(b) Disable MAMA Folds: C2, C3, C4, C5, C6, R2, R3, R4, R5, R6
(c) Conduct fold analysis
Collect 60 sec
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: C
6, 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, R
5
(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 60 sec
events (EV) to check lamp stability
Collect 60 sec
Valid Events (VE) to check lamp stability
(f) Turn off D2
lamp
(g) Collect event counter data for detector dark count rate
Collect 60 sec W
dark events
Collect 60 sec X
dark events
Collect 60 sec Y
dark events
Collect 60 sec Z
dark events
Collect 60 sec OR
dark events
Collect 60 sec
EV dark events
Collect 60 sec VE
dark events
(h) At completion of procedure reset SGM to nominal operating level
Special commanding: Instruction =
ELFOLDTST
---------------------------------------------------------------------------
# Special needs of this proposal?
This propo
sal is run to reactivate the COS
MAMA following an anomalous
shutdown.
Scheduling: As needed
Prerequisites: (e.g., specific SMOV propo
sal; command development?)
PDB update? (Specify table name if known e.g. SIAF).
On
-
board table update? (Specify table name if known e.g. CCDBadPixelTable)
# Special Requirements:
Real time? Y
Special commanding? Y
Qu
ick Data turn
around? Y (time
-
tags
and 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: 0.4
Required turnaround on analysis (weeks): 0.2 per
test
Data volume (Mb needed for analysis): n/a
Special software needed for analysis
? (Describe): The
Engineering Team possesses special COS software used for the fold analysis
Description of analysis Plans: (1
-
2 par
agraphs)
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 val
ues from previous ground and on
-
orbit tests or
model
-
predicted values.
The
darks and
time
-
tag images are examined for unusual spatial or t
emporal
features.
Enter the password to open this PDF file:
File name:
-
File size:
-
Title:
-
Author:
-
Subject:
-
Keywords:
-
Creation Date:
-
Modification Date:
-
Creator:
-
PDF Producer:
-
PDF Version:
-
Page Count:
-
Preparing document for printing…
0%
Σχόλια 0
Συνδεθείτε για να κοινοποιήσετε σχόλιο