Monthly Observatory Report
for
August 1994
COSTAR:
Adjustments were made to the FOC X-Tilt and Focus mechanism positions to compensate for a degradation of the FOC image quality. Operation of the COSTAR was nominal.
WFPCII:
WFPCII continues to operate nominally throughout the month of August. The UV Calibration system remained Off during this period.
The decontamination on day 239 restored UV to nominal values (~1 normalized).
Science and Calibration observations continue to proceed successfully.
FOC:
FOC is continuing the normal science program with GO and GTO cycle 4 proposals using the f/96 relay without problems. for a picture of the faint object camera click here. On day 221 (9-AUG-94) the COSTAR DOB was moved by -12 steps for a fine adjustment of FOC focus. The actual move was executed as -27 steps followed by +15 steps to minimize hysteresis effects. As a consequence of the DOB move the FOC PSF has been restored to near optimum.
FOS:
The FOS continued to execute a variety of GO, GTO, and CAL proposals during the month of August.
GHRS:
Both side 1 and side 2 of the GHRS are running without problems.
1.2 Summary of major problems
COSTAR:
Since SMOV, the quality of the FOC image had degraded to the point where slight adjustments to the COSTAR optics were required. Two mechanism moves were requested.
To remove a slight degree of coma which had developed, a -1 step motion of the FOC X-Tilt mechanism was requested. Since the preferred direction of this mechanism is positive, a negitive overshoot was required. Also, the target position is within the mechanism dead zone, so the overshoot needed to be large enough to clear the dead zone before reversing direction. A -46 step followed by +45 step adjustment was uplinked. This sequence resulted in a position change from 64.10 arcsec to 52.80 arcsec. A telemetry plot of this change can be seen in figure costar-f1.
After the coma was successfully removed, a slight focus adjustment was needed. A -12 step change in the DOB position was commanded. Again, we were moving against the preferred direction so an overshoot was required. A -27 step followed by a +15 step position adjustment was commanded which resulted in a position change from 0.707 mm to 0.453 mm. A telemetry plot of this activity can be seen in figure costar-f2.
FOC:
In general: No major problems with FOC operations during the reporting period. Electrical and thermal monitors of the Instrument continue to show nominal values after the Servicing Mission.
Due to a scheduling problem FOC proposal 5138 "Color-Magnitude Array of NGC6397" was executed at a wrong roll angle.
No HSTAR were filed against the Instrument hardware or its operational software.
FOS:
On day 94.235 during FOS proposal 5531, a series of Exec 20 Status Buffer messages occurred. This error message is issued when a PIT slew request is rejected by the DF224. A review of what was occurring at the time of the errors showed that the FOS was executing a new Target Acquisition Peakup Algorithm which was implemented in stored commanding and build 5.3 of the NSSC-I flight software. Analysis of the associated science data, engineering telemetry and commanding has shown that an error in the DF224 management of the Take-data flag can result in a timing error in the stored commanding. A fix to the DF224 software in being developed.
During the past month the FOS experienced several microprocessor speed check errors. This is an error which is seen occasionally when the microprocessor is under a heavy load. No other FOS errors were caused by the speed check errors.
GHRS:
1.2.1 Monitoring of GHRS carrousel reset activity is continuing. During the month of August there was one reset event for 203 commanded positions.
1.2.2 A fix for the GHRS observation timeout flight software error has been developed. Testing of this fix will proceed at a low priority with delivery expected by the end of the year.
1.2.3 On day 94236, 24-Aug-94, an error was reported when the calibration lamp did not turn on for series of internal GHRS exposures. The proposal running at the time was 5598 - GHRS Side 2 Aperture Offsets. This error was caused by a proposal error and did not reflect any problem with the hardware. For each exposure, the large science aperture was specified instead of the calibration lamp.
WFPCII:
The thermal math model for the UV lamp window and diffuser has been completed. A 30 to 60 minutes of VIS (incandescent) lamps usage is predicted to raise the UV window temperature by 4.7 to 9.0 degrees C, and the diffuser by 2 to 3 degrees C. The proposed idea of preheating the UV window has been dropped due to new contamination information. The RTV seal (Corning 6-1104) around the UV window has recently been identified as a likely source of UV contamination. Preheating with the VIS lamps (prior to turning the UV lamp On) would increase the contamination emission rate from the RTV. This would result in a higher UV polymerization rate of the contamination onto the UV window when the UV lamp is turned On. The recommended procedure is to turn the UV lamp On only when the optical path is clear of volatized material i.e. when the calibration system temperature is at equilibrium (~10 C). The UV lamp will be treated as a limited life item, and its operation will be incorporated into a new Constraint and Restriction Document (CARD). The UV lamp will be turned On on day 295 (last activation was on day 163) following the monthly decontamination. The UV internal flats in the 160, 170, 218, 255 and 336 nm will determine the current UV throughput levels. The results will also indicate whether the UV decline is a function of lamp On time or total time on orbit.
On day 215 at 04:28 UT the CU/SDF sent an error message indicating that the CU/SDF disabled the WFPCII SDF interface. The problem was due to a conflict between the EUBLADE instruction to preposition the shutter blades during a readout, and the fact that this interruption caused the WFPCII firmware logic to delay the succeeding readout by 1MF (OLD 2.4.6.13). As a result the following readout began when the STR was 2 seconds from the end of its allocated time (total 62s). At 17:50 to 18:03 several real time PROCs were uplinked to reset the AP control, SDF, and clear the WFPCII microprocessor/logic flags. The SDF and SDFI were successfully reset and configured. A similar procedure was used for the same proposal on day 217. A second problem occurred in which the EUBLADE qesiparm in the PMDB was incorrectly populated. This caused the exposures to be treated as externals instead of internals. The VIS lamps would not have been turned On, and the shutters would have responded to TDF. The EUBLADE command instruction was corrected via OPR 27159. wfpcii-rpt1 gives a full description of the problem.
The WFPCII radiator temperature has cooled to -72 C on five separate occasions including one in August (day 220). In the event the radiator should reach -75 C the TECs would be turned Off to prevent damage to the TECs due to the possible freezing of the ammonia in the heat pipes. A thermal model is being developed to predict the temperature effects for long cold orientations.
11 out of 19 of degraded guide star acquisitions were on the same pair of guide stars. The other 8 involved 6 different pairs of guide stars.
On day 94.235, FGS servo 1B torque error saturated at -10V at 23:01:13, shortly after the beginning of a type 3 slew. This anomaly resulted in a loss of lock. When the type 3 slew was over, a reacquisition of the guide stars failed because the FGS1 was not at the commanded position. This servo torque anomaly and similar ones are still under investigation.
The angular separation between the dominant FGS (#3) and roll FGS (#1) during the CVZ observation from 230:06:10 to 231:04:41 had a continuous drift of 40 milli-arcseconds while the star selector temperatures were 0.1 and 0.3 deg_C higher than the upper limits for FGS #1 and FGS #3, respectively. This separation drift is believed to be due to the selector temperature violation. A detail memo analyzing this anomaly will be issued in the near future.
The sky distribution of pointings in this month is shown in Fig. 2.1. Fig. 2.2 shows the monthly average pointing miss for primary guide start acquisitions and reacquisitions. The pointing miss is measured from the location of the guide star found during search compared to the predicted position (start of the search). table 2.1 describes the statistics of guide star acquisitions. It takes into account both primary acquisitions and reacquisitions. "No lock" means that coarse track cannot be established or maintained. "Degraded mode" refers to the cases where the guiding mode falls back to coarse track when the commanded mode of the find lock cannot be established or maintained. "Search rad exc" refers to cases where the guide stars are not found.
The distribution of guiding modes by Science Instrument during scheduled exposures is given in table 2.2. for each scheduled exposure, the actual guiding mode is obtained from the engineering telemetry. The scheduled exposure time is subsequently summed up by guding mode for each SI to produce the distribution.
The full-width at half-max (FWHM) of jitter during observations are plotted as a function of the magnitude of the dominant guide stars in Fig. 2.4. the jitter is obtained from the motion of the dominant guide stars in the FGS. The rms of jitter along V2 and V3 axes is also calculated for each observation. The average of FWHM and rms of jitter over all observations in each month is given in Fig. 2.3 and shows no obvious trend.
For each observation, the PMT sensitivity is calculated for each FGS in fine lock based on the PMT count rates and magnitude of the guide stars. The sensitivity is expressed in total counts of the 4 PMTs per 25 milli-seconds normalized for a 13th magnitude star with the FGS filter in pupil position. Fig. 2.5 shows the average sensitivities of each month since Janurary, 1991. The is no obvious trend. The variation of the sensitivities appears compatible to the error of the guide star magnitude.
2.2 Observations
The temperature fluctuations of critical spacecraft components are shown in Figure 3.1. All temperatures are nominal.
3.2 Costar:
the costar trending program is being developed. Table costar-t1 has been included to document current mechanism positions associated with the costar mirrors.
3.3 WFPCII:
tables wfpc-ii t1, t2, t3 and Figures WFPC-II F3-F9 show the August instrument statistics and profiles for cycle usage, power and temperature. All values are nominal and within limits unless otherwise noted.
table t1 shows the cycles of various mechanisms and power supplies.
table t2 shows the lvps, mechanism, and tec voltage and current outputs.
table t3 shows the bays, optical bench, Bulkheads, Cold and Hot junctions, Camera Heads, Attach points, AFM, and Radiator temperature values.
Figure f3 shows the frequency for various shutter close/open and open/close flight times.
Figure f4 shows the cold and hot junctions, Camera Head, and Radiator temperatures. The -72C reached by the radiator may be attributed to a cold HST pointing (with respect to -V3 axis).
Figure f5 shows the bays, optical bench and Cal Module temperatures.
Figure f6 shows the mechanism, tec and 22 lvps voltages and current.
Figure f7 shows the lvps, camera head, and UV Output Monitor voltages.
Figure f8 and Figure f9 shows the afm voltages and current
3.4 FOC:
The f/96 relay of the Instrument continues to operate without problems after the installation of COSTAR: Evaluation of Error Logs show all voltages, currents, and temperatures within their nominal limits.
Serveral plots of selected monitor points critical to the performance of the Instrument are an integral part of this report:
Four critical temperatures are shown foc-p1:foc thermal plots reflecting the thermal profile during the reporting period. The unsusual high sink temperature on day 231 is a result of a spacecraft attitude with a sun angle that warms up the section of the aftshroud in which the FOC is mounted.
A set of three plots foc-p2:foc high voltage monitors illustrate the profile of the output voltages of the critical High Voltage Power Supplies for the FOC detectors. For a picture of the FOC Dectectors click here.
foc-p3:foc vpu noise and sds error log Both plots are focused on the health and safety of the Instrument. The Video Processing Unit (VPU) Noise level indicator summarizes the input signal as detected by the VPU. The peaks typically indicate passages throught the South Atlantic Anomaly (SAA).
foc-p4:foc mode and observation profile shows the usage of the camera over the reporting period. A reading of the Thermal Control Table Number of "2" flags the time the FOC has been in the High Voltage Mode using the f/96 relay. The value of "1" indicates a reactivation of the F/48 Camera section.
Several Tables are inserted to keep track of operational statistics in particular of limited lifetime items: Table foc-t1 illustrates the statistics of the HV cycles and the hours the FOC was operated in the High Voltage Operate Mode. The same table foc-t1 shows the MIN/MAX/AVERAGE values grouped into the different operational modes: Safemode, Hold, and the High Voltage Operate Mode.
the foc-t2: mechanism cycle/usage table summarizes the usage of the mechanism during the reporting period and adds up the total number of cycles during Ground Testing and In-Orbit use.
A statistic on FOC f/96 Observations is given in Table
For a picture of the optical path and the FOC mechanism click
here.
3.5 FOS:
Table
fos-t1
shows the Cycle, Voltage and Miscellaneous summaries for the
FOS for the month of August. There were no health and safety of operational
limit violations for the month. No additional diodes were disabled during
the month.
Table
fos-t2
shows the thermal summary for the month. There were no health
and safety or operational limit violations for the month.
Figure
fos-f1
is the standard plot of Collimator (predicted and actual)
temperature (Y302) as a function of time. The predicted temperatures are
based on algorithms for both the Operate (LVON) state and the Hold (LVOFF)
states as a function of FOS aft shroud sink temperatures. The optical
bench reacts in such a way as to be within +/- 1 deg C of equilibrium 24
hours after a transition. This plot suggests nominal thermal behavior for
the detector as a whole even during the periods of continuous LVON.
Figure
fos-f2
shows a nominal optical bench gradient temperature for the
month.
Figures
fos-f3 and f4
show the Red and Blue detector dark count data for
the month. These plots are a representation of the Overlite counts from
the FOS at all times that the detector is in Operate mode. Overlite is
an engineering telemetry monitor of the total counts on the active detector
array for the last 60 seconds. The data represented here occured after HV
stabilization, after dead/noisy diode disabling, outside the SAA, with the
FOS aperture door shut, and all lamps off. The data are therefore total
dark counts in a 60 second period for all enabled diodes.
Figures
fos-f5 and f6
show the comparison of August's dark count data to
July's. August's dark count data represent nominal performance.
3.6 GHRS:
All trended monitors appeared normal for this reporting period. The following
tables and figures summarize activity of selected areas of the instrument.
Table
ghrs-t1
is a cycle and use summary of the instrument mechanisms as well as
a statistical analysis of main bus voltages and currents.
Table
ghrs-t2
is a statistical summary of key instrument temperatures. All
temperatures are within their normal range.
Figure
ghrs-f1
contains plots of the detector temperatures and voltages for the
month, as well as plots of the optical bench and MEB 1 temperatures.
Figure
ghrs-f2
contains monthly power profiles for each side of the instrument
as well as historical summaries of hours spent in OPERATE mode and carrousel
commanding and reset activity.
This is an account of the events that took place which were related to the
problematic WFII EUBLADE commanding on the 213 sms.
Proposal 5569, which is an internal flat calibration proposal, was scheduled on
the 213 sms. To implement this proposal, new commanding was written that would
precondition the shutter blades before the internal exposure to allow the
different reflection patterns of the two shutter blades to be calibrated. A
pmdb change request was needed to populate the QESIPARM 'blade', with the value
A or B, depending on the shutter blade selected. The problems with the
commanding of these exposures was twofold. One problem was inherent in the
commanding itself, and the other was related to the improper implementation of
the pmdb change request.
The instruction EUBLADE was in violation of the OLD item 2.4.6.13 WFPC-II Move
Shutter/Fail-Safe Command transmitting, which basically says that you can't
command the shutter while other WFII scheduled events (i.e. prepare/readout,
infrequent, expose) are taking place, at the risk of science data loss (an
understatement). The instruction was written so that the shutter prepositioning
could take place during the previous exposure's readout. It turns out that if
the previous exposure is done as a parallel, the extra minute allocated for the
readout (a total of 2 minutes) negates the error condition, since the readout
activity has finished before the shutters are commanded to move.
When the shutter commanding executed, the firmware code's logic caused the
subsequent readout to be delayed by one major frame, or 1 minute. This is a
remnant from WFPC-1. In fact, the code keeps track of what activity type is
being interrupted, and sets a flag that delays the next activity of the same
type by one minute. So when the WFII started the readout after the shutter
motion, filter prepping, and exposing, the readout was delayed 1 minute into an
activity which was supposed to take 1:02. Thus, after approximately 2 seconds
of data transmission, a cease command from the NSSC-1 caused the SDF to stop
transfering any more data.
MF MF MF
| | |
|--------------------|
tape activity |==================|
readout
^^
||
|cease command
|
2 seconds overlap
This caused the first status buffer message to be sent at 215:04:28. It was a
CU/SDF error message, code 13(decimal). The result was that the SDF disabled
the WFII SD interface. Since the WFII SD interface was disabled, subsequent
WFII exposures did not get status buffer messages posted after the first one
for the rest of the exposures in that obset, nor did any more WFII science data
come across the SDF.
Around 11:23, the WFII, which had been commanded down to Standby, was commanded
back up to Ready. The upward transition brought the Science Data Interface up.
There was and OKSEND command at the tail end of the tape commanding that was a
fossil from an old HRS test, and this caused a line of latched data in the WFII
to come across. This hosed the SDF, and caused another CU/SDF error message,
code 22.
These status buffer messages were followed by six errors, message # 31,
parameter 30, which are "CU/SDF failed to respond to an ""NSSC-1 has SD to
output"" request", for the exposures taken after the SDF had been hosed.
A first attempt to recover the WFII/SDF interface was made in the window
215:14:00-14:30. This didn't solve the problem because the SDF was hung
already. The actions were as follows:
S,UCLRFLGS(90)
S,SDISIIF(5,1)
A second, different attempt was made during the window 215:17:50-18:03. The
actions were as follows:
S,MAPCTRL(6,2)
S,RESETSDF
S,RSENCODE(1)
S,PNENCODE(1)
S,MSDFMTLD
S,SDFINPUT(1)
S,UCLRFLGS(90)
S,SDSIIF(5,1)
S,MAPCTRL(6,6)
S,MAPCTRL(6,3)
This procedure corrected the problems on the spacecraft. The erroneous
instruction (non-parallel) was scheduled to execute again on day 217, so a
'clean-up' procedure was prepared for the first available window after the WFII
SD interface would hose up. The window was 217:11:05-11:25. The following
actions were taken and the interface was successfully recovered:
S,UCLRFLGS(90)
S,SDISIIF(5,1)
Glenn Schneider and Mike Hinds looked at various data to verify that the
readout was indeed delayed by 1 minute. From the .pkt, we looked at the spacing
between packets, and also verified that only approximately 2 seconds of real
data came across for the first delayed readout. Also the telemetry reporting
(the echo back of the UEXPORT1 and URDUTPT2 commanding in the MF after the
commands were actually executed) was inspected, and the 1 minute delay was
present where we expected it to be.
The other problem with this proposal was a procedural error in SPSS. The change
request was not processed correctly. The EUBLADE QESIPARM population was
requested, but some other entities on the database were deleted by mistake when
this request was implemented. This caused the exposures to take on the default
value of type EXTERNAL when they were supposed to be internal. This propagated
through to commanding by having the shutter AP take control and command the
shutters open for the exposure, when they should have been internals using the
lamps with no shutter motion. But the TDF was down for the first exposures, so
that when the shutters were opened by the AP, they were immediately closed
again. So the data should have been similar to darks for these, had they been
read out properly.
Additional information:
It was determined by looking at the .pkt data that the intra-line R/O in
progress was not affected by the blade motion. This was not predicted by
looking at the firmware code. A 110 ms delay during shutter motion was
expected.
In the WF/PC Flight Microcomputer Controller's Firmware Design Document, the
flow diagram for the Move Shutter state processing subroutine is incomplete
and must be updated. It makes no mention of the delay next similar activity
flags being set.
There was a procedural problem at MOSES in that a Stat Buff error which was
not on the benign list went unreported.
There was a procedural error in commanding in that a first-time execution of
special commanding on an SMS went unreviewed.
OPR #27159 for EUBLADE was opened to bullet-proof it against the same type of
failure occuring again.
Table 2.1 - Guide star acquisition statistics ============================================= Total number of CT acquisitions 0 Total number of FL acquisitions 447 Total number of acquisitions 447 Non acquisit. due to vehicle safe 0 Failures due to Search Rad Exc 1 Failures due to No Lock 0 Total number of Degraded mode 19 Percentage of failed acq. 0.22 Total number of LOL during observ 8 Total observ time lost to LOL (s) 2184
Table 2.2 The distribution of guiding modes (hours)
===================================================
SI IN EC GY CT FL Total
WFP 20.719 3.608 6.164 3.084 130.349 163.924
FOC 0.833 0.000 0.000 0.000 24.186 25.020
FOS 3.542 0.000 0.000 0.000 43.859 47.401
HRS 9.007 0.000 0.014 5.183 8.271 22.476
FGS 0.000 0.000 0.000 0.011 0.084 0.095
Total 34.102 3.608 6.178 8.279 206.750 258.916
% 13.171 1.393 2.386 3.197 79.852 100.000
-----------------------
SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
% = Percentage
Table COSTAR-T1:
Status of COSTAR Mechanism Positions:
Dead Zone Preferred Date of
Mechanism Position (arc sec) Direction Last Move
-----------------------------------------------------------------------
FOC Focus | 0.453 mm | n/a | pos | 8/ 9/94
-----------------------------------------------------------------------
FOC X-Tilt | 52.80 arc sec | -108.08 to 56.20 | pos | 8/ 3/94
-----------------------------------------------------------------------
FOC Y-Tilt | 144.71 arc sec | 923.00 to 1079.20 | neg | 1/ 6/94
-----------------------------------------------------------------------
FOS Focus | -0.10 mm | n/a | neg | 2/22/94
-----------------------------------------------------------------------
FOS X-Tilt | -65.45 arc sec | n/a | neg | 2/22/94
-----------------------------------------------------------------------
FOS Y-Tilt | 51.44 arc sec | n/a | neg | 2/22/94
-----------------------------------------------------------------------
GHRS Focus | 0.06 mm | n/a | neg | 2/15/94
-----------------------------------------------------------------------
GHRS X-Tilt | 53.24 arc sec | 998.16 to 1247.70 | neg | 2/15/94
-----------------------------------------------------------------------
GHRS Y-Tilt | 127.80 arc sec | n/a | neg | 2/15/94
-----------------------------------------------------------------------
WFPCII Cycle/Usage Report for: 94213_031
Start date:94.213 End date:94.243
--------------------------------------------------------------------------------
Cycles Time (hrs)
This Period Total This Period Total
---------------------------- -----------------------------
LVPS 0.0 1.0 740.0 6283.4
Mech PS 1.0 9.0 725.0 6039.3
TEC PS 1.0 8.0 723.4 5805.9
AFM PS 0.0 1.0 740.0 6156.4
Replacement Htrs 218.5 5007.0 246.8 2100.6
Heatpipe Htrs 2.0 18.0 15.0 244.1
Cal VIS usage 20.0 155.0 22.2 113.6
Cal UV usage 0.0 39.0 0.0 22.1
Cal mirror moves 40.0 372.0 n/a n/a
Shutter A moves 1243.0 8094.0 n/a n/a
Shutter B moves 1199.0 7712.0 n/a n/a
SOFA Wheel 1 33.0 352.5 n/a n/a
SOFA Wheel 2 6.0 48.5 n/a n/a
SOFA Wheel 3 33.0 286.5 n/a n/a
SOFA Wheel 4 38.0 238.5 n/a n/a
SOFA Wheel 5 55.0 435.5 n/a n/a
SOFA Wheel 6 19.0 228.5 n/a n/a
SOFA Wheel 7 27.0 222.5 n/a n/a
SOFA Wheel 8 13.5 257.0 n/a n/a
SOFA Wheel 9 201.0 689.5 n/a n/a
SOFA Wheel 10 231.5 794.5 n/a n/a
SOFA Wheel 11 46.0 405.5 n/a n/a
SOFA Wheel 12 5.0 41.5 n/a n/a
WFPCII Voltage Report for: 94213_031
Start date:94.213 End date:94.243
--------------------------------------------------------------------------------
LVPS: (Hold mode or above) Operating time this reporting period 740.0 hrs
Lowlim Min Avg Max St.Dev. Hilim
UCHVLTS 0.0 34.5 34.6 34.7 0.1 0.0
UP15VANA 0.0 14.8 14.8 14.9 0.1 0.0
UP15VADC 0.0 14.8 14.9 14.9 0.0 0.0
UP10VLGC 0.0 10.0 10.0 10.0 0.0 0.0
UP5VADC 0.0 4.9 4.9 4.9 0.0 0.0
UP5VLGC 0.0 4.9 4.9 4.9 0.0 0.0
Negative values not converted (DN):
UN15VADC 0.0 125.0 125.0 125.0 0.0 0.0
UN15VANA 0.0 124.0 124.0 125.0 0.0 0.0
UN5VMON 0.0 68.0 68.0 68.0 0.0 0.0
MECH: (Standby or above) Operating time this reporting period 725.0 hrs
UMECVOLT 0.0 34.0 36.5 38.9 1.4 0.0
UP22VMON 0.0 21.8 22.0 22.2 0.0 0.0
TEC: (Standby or above) Operating time this reporting period 723.4 hrs
UTECVOLT 0.0 0.0 16.9 21.4 1.7 0.0
UTECCUR 0.0 0.0 771.6 901.6 56.1 0.0
WFPCII Thermal Report for: 94213_031
Start date:94.213 End date:94.243
SAFEMODE: 0.02 hr HOLDMODE: 14.98 hr STBY or above: 723.98 hr
------------------------------------------------------------------------------------------------------------------------------------
Electronics Lowlim Min Avg Max St.Dev. Hilim Lowlim Min Avg Max St.Dev. Min Avg Max St.Dev. Hilim
UBAY1TMP 0.0 13.6 13.6 13.6 0.0 0.0 0.0 10.9 12.4 14.9 1.0 10.9 12.6 14.9 1.1 0.0
UBAY2TMP 0.0 13.6 13.6 13.6 0.0 0.0 0.0 12.2 12.9 13.9 0.4 11.9 12.9 13.9 0.5 0.0
UBAY3TMP 0.0 15.6 16.0 15.6 0.0 0.0 0.0 13.2 15.3 20.2 2.1 12.9 15.5 20.2 2.2 0.0
UBAY4TMP 0.0 16.0 16.0 16.0 0.0 0.0 0.0 12.9 15.7 21.4 2.6 12.9 15.9 21.4 2.8 0.0
UBAY5TMP 0.0 6.6 6.3 6.6 0.0 0.0 0.0 -16.9 -11.1 6.3 5.5 -15.0 9.0 14.6 2.1 0.0
UCMODTMP 0.0 10.0 10.0 10.0 0.0 0.0 0.0 9.7 9.9 10.3 0.1 9.7 10.4 34.1 1.2 0.0
URIUATMP 0.0 17.4 39.2 39.2 0.0 0.0 0.0 16.4 17.0 20.5 0.3 16.1 17.0 20.5 0.3 0.0
URIUBTMP 0.0 17.1 215.1 215.1 0.0 0.0 0.0 -60.4 16.6 17.1 0.2 -60.4 16.5 32.8 0.3 0.0
UAFMRIUT 0.0 16.4 16.4 16.4 0.0 0.0 0.0 16.1 16.4 16.4 0.0 15.8 16.3 33.7 0.2 0.0
UAFMELT1 0.0 11.9 11.9 11.9 0.0 0.0 0.0 11.9 12.1 12.2 0.2 11.6 12.0 12.9 0.2 0.0
Opt. Bench Lowlim Min Avg Max St.Dev. Hilim Lowlim Min Avg Max St.Dev. Min Avg Max St.Dev. Hilim
UCHBHTMP n/a n/a n/a n/a n/a n/a 0.0 12.3 12.5 12.6 0.1 12.2 12.4 12.6 0.1 0.0
UFMBHTMP n/a n/a n/a n/a n/a n/a 0.0 12.4 12.4 12.5 0.0 12.4 12.5 13.0 0.1 0.0
UPYRMDTM 0.0 12.2 12.2 12.2 0.0 0.0 0.0 11.9 11.9 12.2 0.1 11.9 12.0 12.6 0.2 0.0
Detectors Lowlim Min Avg Max St.Dev. Hilim Lowlim Min Avg Max St.Dev. Min Avg Max St.Dev. Hilim
UCH1ELTM n/a n/a n/a n/a n/a n/a 0.0 13.1 14.4 15.9 0.7 12.5 13.8 15.9 0.7 0.0
UCH2ELTM n/a n/a n/a n/a n/a n/a 0.0 13.4 14.8 16.4 0.8 12.7 14.2 16.4 0.8 0.0
UCH3ELTM n/a n/a n/a n/a n/a n/a 0.0 13.7 15.1 16.8 0.8 12.9 14.5 16.8 0.8 0.0
UCH4ELTM n/a n/a n/a n/a n/a n/a 0.0 15.7 17.1 18.6 0.7 14.8 16.4 18.5 0.8 0.0
UCH1HJTM 0.0 -40.8 -42.0 -40.8 0.0 0.0 0.0 -42.0 -25.7 -17.7 4.6 -47.3 -35.2 52.5 4.7 0.0
UCH2HJTM n/a n/a n/a n/a n/a n/a 0.0 -36.3 -22.0 -13.6 4.6 -40.4 -30.4 -16.9 4.1 0.0
UCH3HJTM n/a n/a n/a n/a n/a n/a 0.0 -48.0 -29.7 -21.5 4.9 -54.0 -40.4 -24.8 4.4 0.0
UCH4HJTM n/a n/a n/a n/a n/a n/a 0.0 -51.3 -31.9 -21.9 5.5 -56.4 -42.5 -25.7 5.0 0.0
UCH1CJTM n/a n/a n/a n/a n/a n/a 0.0 -88.3 18.7 22.1 9.1 -88.6 -88.2 22.1 3.8 0.0
UCH2CJTM n/a n/a n/a n/a n/a n/a 0.0 -88.8 17.8 21.5 9.6 -89.0 -88.6 16.0 3.7 0.0
UCH3CJTM n/a n/a n/a n/a n/a n/a 0.0 -88.4 19.1 22.3 8.7 -88.5 -88.2 22.3 3.8 0.0
UCH4CJTM n/a n/a n/a n/a n/a n/a 0.0 -88.9 17.6 21.3 9.5 -89.1 -88.7 15.9 3.7 0.0
Mechanisms Lowlim Min Avg Max St.Dev. Hilim Lowlim Min Avg Max St.Dev. Min Avg Max St.Dev. Hilim
UMNTPTMP 0.0 2.7 2.7 2.7 0.0 0.0 0.0 2.7 11.6 11.9 0.1 2.7 11.9 13.2 0.2 0.0
UPOMTEMP 0.0 14.5 14.5 14.5 0.0 0.0 0.0 14.3 14.4 14.5 0.1 14.0 14.4 14.7 0.1 0.0
URADNTMP 0.0 -63.4 -18.1 -63.4 0.0 0.0 0.0 -60.6 -38.9 -18.1 6.0 -72.0 -54.3 -13.1 5.4 0.0
URADPTMP 0.0 -82.9 -82.9 -82.9 0.0 0.0 0.0 -82.9 -38.5 -27.0 6.3 -82.9 -53.9 -12.8 5.6 0.0
UATPATMP 0.0 12.2 12.2 12.2 0.0 0.0 0.0 11.9 12.0 12.2 0.2 11.9 12.2 12.9 0.2 0.0
UATPBTMP 0.0 11.3 11.3 11.3 0.0 0.0 0.0 10.9 11.1 11.6 0.2 10.9 11.2 11.9 0.2 0.0
UATPCTMP 0.0 12.2 12.2 12.2 0.0 0.0 0.0 11.6 12.0 12.2 0.1 11.3 11.9 12.6 0.2 0.0
Statistics of FOC Analog Monitors (F/96)
Start date: 94213 End date: 94243 SAFE HOLD HV MSID MIN AVG MAX STD MIN AVG MAX STD LowLim MIN AVG MAX STD HighLim Temperatures: X112******** ******** ******** ******** 16.82 16.85 17.42 0.07 16.25 16.82 17.17 17.42 0.20 17.74 X124******** ******** ******** ******** -28.26 -23.22 -15.31 1.15 -41.37 -26.96 -20.60 -14.59 2.23 -8.53 X128******** ******** ******** ******** 5.30 7.56 17.17 1.62 -15.31 -1.71 4.76 14.34 2.86 20.00 X110******** ******** ******** ******** -9.72 -7.52 1.84 1.35 -25.65 -9.72 -3.97 1.84 3.08 13.85 X106******** ******** ******** ******** -2.40 -1.55 3.37 0.70 -10.00 -2.62 -1.33 4.78 1.42 20.00 X720******** ******** ******** ******** ******** ******** ******** ******** -99.00 -6.18 11.39 16.57 3.99 26.43 EBA Units HK Voltages: X134******** ******** ******** ******** 0.00 0.02 0.02 0.00 1.46 2.04 2.07 2.08 0.01 2.50 X140******** ******** ******** ******** 0.00 0.00 0.00 0.00 1.62 2.48 2.51 2.52 0.01 3.52 X144******** ******** ******** ******** 0.00 0.00 0.04 0.00 4.34 4.46 4.50 4.52 0.00 4.88 X148******** ******** ******** ******** 4.46 4.48 4.48 0.00 4.36 4.46 4.48 4.48 0.00 4.60 X150******** ******** ******** ******** 3.88 3.90 4.00 0.00 3.76 3.92 4.03 4.18 0.01 4.68 Detector Power Control Unit (PCU) X154******** ******** ******** ******** 0.15 0.15 0.18 0.00 2.20 2.20 2.55 3.37 0.03 5.06 X156******** ******** ******** ******** 23.52 24.38 27.58 0.05 26.32 27.44 27.80 28.00 0.05 29.40 X726******** ******** ******** ******** 0.00 0.00 0.56 0.00 0.00 0.00 0.18 1.76 0.03 6.00 Detector Power Supplies: X162******** ******** ******** ******** 0.00 0.00 0.03 0.00 4.90 5.15 5.18 5.18 0.00 5.53 X164******** ******** ******** ******** 0.00 0.00 0.00 0.00 14.36 15.06 15.10 15.12 0.01 15.56 X166******** ******** ******** ******** -99.90 -99.90 -99.90 0.00 -15.48 -14.95 -14.95 -14.95 0.00 -14.43 X168******** ******** ******** ******** 0.00 0.00 0.00 0.00 27.06 27.73 27.84 27.84 0.00 99.99 X172******** ******** ******** ******** -9.99 -9.99 -9.99 0.00 1.50 1.58 1.68 1.89 0.01 2.09 High Voltage P/S: X800******** ******** ******** ******** -9.99 -9.99 -9.99 0.00 10.18 10.47 10.47 10.49 0.00 10.59 X808******** ******** ******** ******** -9.99 -9.99 -9.99 0.00 38.23 36.13 36.35 36.35 0.00 38.84 X812******** ******** ******** ******** -9.99 -9.99 -9.99 0.00 10.00 10.76 10.84 10.84 0.00 11.00 Detector Focus Parameter: X736******** ******** ******** ******** -99.90 -99.90 -99.90 0.00 67.18 70.16 72.55 74.99 0.03 76.86 X738******** ******** ******** ******** 0.00 0.00 145.06 0.01 131.40 141.91 143.47 145.06 0.01 161.10 X742******** ******** ******** ******** 9.99 9.99 9.99 0.00 -47.10 -47.06 -43.99 -43.67 0.01 -42.40 X748******** ******** ******** ******** 0.00 0.02 618.83 0.05 697.00 909.77 921.77 946.71 3.14 1011.00 X750******** ******** ******** ******** 0.00 0.00 24.54 0.00 117.30 158.18 161.08 172.72 0.11 182.70 X752******** ******** ******** ******** 0.00 0.00 0.00 0.00 6.76 7.12 7.17 7.22 0.00 8.00 Contamination Monitoring: X158******** ******** ******** ******** 0.00 0.00 0.02 0.00 0.00 0.00 0.02 0.38 0.01 3.00 X160******** ******** ******** ******** 0.16 0.18 0.20 0.00 0.00 0.18 4.50 4.52 0.00 5.20 SAFE 0.0 cycles 0.0 hrs F48 lifetime 129.7% HOLD F48 3.0 cycles 101.81 hrs HV F48 1.0 cycles 583.0 total cycles 0.30 hrs 2593.51 total hrs F96 lifetime 327.1% HOLD F96 8.5 cycles 531.18 hrs HV F96 6.5 cycles 931.5 total cycles 109.26 hrs 6541.17 total hrs
FOC-T1: Engineering Trending and HV statistics
FOC Mechanism Cycle/Usage Report (F/96)
Start date: 94213 End date: 94243 F/96 Mechanisms Predicted Cycles Ground Testing In-Orbit This period Total Lifetime Shutter 10000 IN/OUT movements 1234 3026.00 73.00 4333.00 43.33 FW-1 10000 full revolutions 105 256.84 8.66 370.50 3.70 FW-2 10000 full revolutions 228 540.83 7.67 776.50 7.76 FW-3 10000 full revolutions 107 246.57 8.66 362.23 3.62 FW-4 10000 full revolutions 50 129.31 0.50 179.81 1.80 Refoc 10000 full strokes (16mm) 106 259.67 1.90 367.57 3.68 FOC-T2 Mechanism Cycle/Usage Statistics
FOC Observation Statistics
Start date: 94213 End date: 94243 Type of Obs. Number of Observations Exposure Time Loss of Lock this period total total in Min Number Sec EXTERNAL 75 2869 1451.2 0 0 INTFLAT 5 528 50.0 N/A N/A DARK 0 304 0.0 N/A N/A FOC-T3: Observation Statistics
Monthly FOS Trending Report: Day 94.213:00:00 - 94.240:23:59 Cycle Summary This Period Total Since Launch Design Lifetime Cycles Hours Cycles Hours Cycles Hours SAFE 0 0.00 30 1954.11 n/a n/a HOLD n/a 287.18 n/a 19268.48 n/a n/a Red LV 11 128.53 559 5153.89 ~ ~ Blue LV 11 256.29 588 7089.91 ~ ~ Red HV 15 60.67 668 3261.67 ~ ~ Blue HV 16 88.09 782 3845.00 ~ ~ Cal lamp A 38 0.39 587 21.95 ~ 500 hours Cal lamp B 36 0.41 1482 20.74 ~ 500 hours Taled/Ion 3 0.23 603 205.44 ~ ~ Ent Door 174 n/a 7945 n/a 20000 n/a Apt Wheel 132 n/a 3906 n/a 30k(90) n/a FGW 168 n/a 5656 n/a 54k (90) n/a Pol Wheel 68 n/a 2296 n/a 100k(22.5) n/a Red anomolous uP resets 0 n/a 1 n/a n/a n/a Blue spurious uP resets 0 n/a 47 n/a n/a n/a Blue anomolous uP resets 0 n/a 1 n/a n/a n/a Voltage and Current Summary (This Period) Low Lim Minimum Average Maximum High Lim Red side Logic Supply (Volts) 4.83 4.90 4.93 5.00 5.03 Red side Quiet Supply (Volts) 7.80 7.89 7.99 8.05 8.20 Red side High Voltage (KVolts) ~ 21.47 21.86 21.86 ~ Red side High Voltage Cur (uAmps) ~ 22.45 23.19 23.53 ~ Red Discriminator Voltage (Volts) ~ 4.08 4.11 4.86 ~ Blue side Logic Supply (Volts) 4.87 4.93 4.96 5.00 5.07 Blue side Quiet Supply (Volts) 7.80 7.95 8.04 8.11 8.20 Blue side High Voltage (KVolts) ~ 21.37 22.76 22.84 ~ Blue side High Voltage Cur (uAmps) ~ 21.27 22.67 23.24 ~ Blue Discriminator Voltage (Volts) ~ 3.98 4.23 4.86 ~ Calibration lamp A voltage (volts) ~ 210.34 210.51 212.32 ~ Calibration lamp A current (uAmps) 8.00 10.41 10.41 10.41 12.00 Calibration lamp B voltage (Volts) ~ 208.35 208.60 212.32 ~ Calibration lamp B current (uAmps) 8.00 10.41 10.41 10.41 12.00 Miscellaneous Summary This Period Since Launch^ Max Total Max Total Max Limit Total Limit Red Total Accumulated Counts 3.53E+07 5.26E+08 4.03E+08 5.10E+10 1.20E+08 1.00E+15 Blue Total Accumulated Counts 2.04E+07 3.33E+08 5.12E+07 5.34E+10 1.20E+08 1.00E+15 Overlite Red SAA 2.99E+07 4.11E+07 2.69E+08 1.35E+09 1.20E+08 n/a Overlite Blue SAA 1.71E+07 3.76E+07 3.61E+07 1.03E+14 1.20E+08 n/a Detector Dark Count Summary (This Period) Max (Cnts) Avg (Cnts) Std. Dev. Time (hrs) New Bad Chnls Tot Bad Chnls Red Dark Counts 1.98E+03 3.34E+02 171.63 17.13 0 15 Blue Dark Counts 1.94E+03 2.42E+02 127.42 20.98 0 26 Limits defined as nominal operating limits, not action or health and safety limits. ~ Engineering Data Analysis not fully defined at this time.: n/a Not Applicable Total hours since Nov 1,1990 only : ^ Total since April 1, 1991 only. Table FOS-T1: August 1994 Cycle and Voltage Summary
Monthly FOS Trending Report: Day 94.213:00:00 - 94.240:23:59 All Temperatures in C HOLD Operate RED Operate BLUE Low Lim Min. Avg. Max. Hi Lim Low Lim Min. Avg. Max. Min. Avg. Max. Hi Lim Detectors A Side Photocathode -32.0 -18.3 -14.4 -8.7 33.0 ~ -17.1 -13.4 -8.7 -17.1 -12.2 -8.7 -7.0 A Side Charge Amplifier -35.0 -15.9 -12.0 -1.7 33.0 ~ -15.9 -5.5 -1.2 -13.8 -6.7 -2.7 2.0 A Side Permanent Magnet Focus -25.0 -8.7 -6.4 -1.2 23.0 ~ -9.5 -4.9 -1.2 -8.0 -4.4 -1.2 4.0 B Side Photocathode -32.0 -17.1 -13.7 -8.7 23.0 ~ -17.1 -13.1 -8.7 -15.9 -11.1 -7.3 -7.0 B Side Charge Amplifier -32.0 -15.9 -11.5 -3.2 33.0 ~ -14.8 -8.5 -4.3 -13.8 -4.0 -0.7 2.0 B Side Permanent Magnet Focus -32.0 -8.7 -6.1 -1.2 23.0 ~ -8.7 -5.8 -1.7 -8.0 -3.3 -0.7 4.0 Electronics RIU A -32.0 -14.4 -9.6 1.0 33.0 ~ -14.4 -4.8 1.0 -13.8 -4.0 1.0 7.0 RIU B -32.0 -15.1 -10.0 3.3 33.0 ~ -15.1 -6.2 1.0 -13.1 -1.4 3.7 7.0 Central Electronics Assembly -35.0 -12.8 -8.1 17.3 33.0 ~ -12.8 9.2 16.3 -10.2 12.0 17.3 21.0 Central Power Supply -23.0 -14.8 -10.2 12.2 33.0 ~ -14.8 2.8 9.1 -13.8 6.5 12.2 16.0 High Voltage Power Supply -35.0 -15.9 -11.5 3.7 33.0 ~ -15.9 -6.6 -0.2 -13.8 -2.4 3.7 6.0 Analog Signal Processor -35.0 -17.1 -12.2 3.7 33.0 ~ -15.9 -3.8 1.8 -14.8 -0.8 3.7 12.0 XY Deflection Coil Drivers -36.0 -13.8 -8.9 11.1 40.0 ~ -12.8 3.7 10.1 -12.8 6.1 11.7 16.0 Optical Bench Grazing Mirror -2.0 10.1 11.5 13.7 33.0 ~ 10.1 12.1 13.2 10.6 13.2 14.2 18.0 Collimator -2.0 9.1 10.5 12.7 33.0 ~ 9.1 10.8 12.2 9.6 11.9 12.7 17.0 A Side Detector fitting -2.0 8.1 9.3 11.7 33.0 ~ 8.1 9.8 11.7 8.6 10.7 11.7 14.0 B Side Detector fitting -2.0 9.1 10.3 12.7 33.0 ~ 9.1 10.6 12.2 9.1 11.6 12.7 14.0 A Side Internal fitting -35.0 3.7 5.4 9.1 31.0 ~ 3.2 6.4 8.6 4.2 8.0 9.6 12.0 B Side Internal fitting -35.0 -2.7 -1.0 2.2 31.0 ~ -2.7 -0.7 1.3 -2.2 0.6 1.8 7.0 Gradient* -15.0 5.3 7.0 8.8 5.8 7.4 8.3 15.0 Mechanisms Entrance Port -15.0 4.7 6.6 10.6 37.0 ~ 5.1 7.4 10.1 5.6 8.7 10.6 13.0 Entrance Aperture -15.0 8.1 9.9 13.2 37.0 ~ 8.1 10.9 21.9 8.6 11.6 16.3 18.0 Polarizer Wheel -15.0 9.6 11.0 13.7 37.0 ~ 9.6 11.5 17.3 10.1 12.4 17.3 20.0 FGWH motor A -9.0 11.1 12.4 14.8 31.0 ~ 11.1 12.9 14.2 11.7 13.3 14.2 22.0 FGWH motor B -9.0 11.1 12.5 18.9 31.0 ~ 11.1 13.2 19.9 11.7 13.6 20.9 22.0 Limits defined as operational limits, hold mode limits based on action values, operate limits based on FOS thermal control tutorial. ~ Engineering Data Analysis not fully defined at this time. Table FOS-T2: August 1994 Thermal Summary
Table GHRS-T1
August GHRS Trending Report: Day 94213 - 94240
Cycle Summary
This period Total to Date * Est. life
cycles hours cycles hours# hours
Low Voltage Side 1 Power 8 109.9 197 1258 --
Low Voltage Side 2 Power 0 672 254 25209.1 --
High Voltage Side 1 Power 8 109.6 91 1196.3 --
High Voltage Side 2 Power 6 102.7 315 7023.8 --
DEB Side 1 Power 22 34 303 784.2 --
DEB Side 2 Power 19 35.4 1206 4250.4 --
Carrousel Power 40 69.2 1233 4645.7 --
Spectral Cal Lamp 1 0 0 668# 241.1 1500
Spectral Cal Lamp 2 56 5 3171# 403.5 1500
Flat Field Lamp 1 1 0 144# 75.8 1000
Flat Field Lamp 2 0 0 245# 87.1 1000
Shutter 177 -- 6344 -- --
Carrousel 203 -- 13855 -- --
*Total from Nov.1, 1990
#Prelaunch totals included
Target Acquisition Summary (This Period)
Commanded Successful No Target GS Acq Failed Other
Mode-I 0 0 0 0 0
Mode-II 12 11 0 1 0
Peakup 7 7 0 0 0
Image 4 4 0 0 0
Voltage and Current Summary (This Period)
Minimum Average Maximum
Photocath 1 Voltage (-kV) 21.6 21.6 21.8
Photocath 2 Voltage (-kV) 21.9 22.0 22.0
HVPS 1 Current - PCC1 (mA) 74.6 77.8 80.8
HVPS 2 Current - PCC2 (mA) 78.2 81.4 84.0
LV 1 Regulator Voltage (V) 21.2 21.8 22.1
LV 2 Regulator Voltage (V) 22.0 22.6 23.0
Standby 1 Regulator Voltage (V) 19.8 20.2 20.3
Standby 2 Regulator Voltage (V) 19.7 20.2 20.3
Power Summary (This Period)
Minimum Average Maximum
Side 1 (W) 20.8 28.2 132.0
Side 2 (W) 40.4 60.1 176.1
Time Spent In Each Mode
Side 1 Side 2
(hours) (hours)
Safe 0.0 0.0
Hold 562.1 0.0
Standby 0.0 0.0
Ready 75.6 67.6
Operate 34.0 35.1
LV Ready 0.2 569.0
LV Operate 0.0 0.3
Table GHRS-T2
August GHRS Trending Report: Day 94213 - 94240
Thermal Summary (deg C) (This Period)
Monthly Hold Operate
yel yel Side 1 Side 2
low min avg max high avg min avg max min avg max
RIU A -20 6.5 10.7 24.7 35 9.3 7.3 12.1 18.5 6.9 13.7 20
RIU B -20 6.9 11 24.7 35 9.6 7.7 12.2 18.5 7.3 15.1 21.7
DEB Front -28 -8.9 -1.8 37.5 45 -4.6 -8.9 1.9 13.8 -7.8 15.9 31.2
DEB Rear -28 -8.9 -1.1 38 45 -3.8 -6.7 3 15 -7.4 17 32.5
Detector 1 -5 9 11 19.6 28 10.5 9.3 10.9 12.8 9.3 11 14.1
Detector 2 -5 8.3 10.4 16.1 28 10.1 9 10.1 12.8 9 11.9 15.7
Digicon
Radiator -18 -2.2 0.4 6 14 0 -1.5 0.2 2.3 -1.5 1.1 4.3
Optical Bench
Bulkhead 6 16.4 17.8 22.5 30 17.5 16.8 17.7 19.3 16.8 18 20.4
Pre-amp 1 3 14.7 17.4 44.4 48 16.1 14.7 23.2 32.1 14.7 16.9 30.4
Pre-amp 2 3 14.7 17.5 39.5 48 17.8 15 16.7 23.2 15 31 39.5
MEB 1 -25 6 11.5 36.5 38 9.6 7.7 21.8 30.8 7 17.1 23.9
MEB 2 -25 5 9.3 23.2 38 7.7 6 11.4 23.9 5.7 12.8 19.3
Carrousel
Stator 5 16.1 17.8 23.2 31 17.5 16.4 17.6 20 16.4 18.4 21.4
Fixture I/F A -16 0.3 2.8 9 18 2.7 1 2.3 5.7 1 3.4 7.7
Fixture I/F B -19 -1.5 0.6 3 11 0.4 -0.7 0.5 1.7 -1.1 0.6 2.7
Fixture I/F C -24 -5.9 -2.7 6.3 16 -3.1 -4.8 -3.2 0.7 -5.2 -0.9 4.3