Operations Day -- 152/1998 (1 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 152/1998 (June 1, 1998)
Mission Day -- 281
Orbit Number -- 98152
Pass Highlights: station AOS LOS
DSS-66 14:53:16 18:20:00
Pass Summary:
Nominal Daily support - 24 commands sent - SSR B played Back
Anomalies:
None.
Activities:
1450 BOT w/ D66
1456 SSR put in Record Operate Mode
1457 SSR put in Playback Operate Mode
1500 LOS TT bin loaded
1511 S/C commanded to Science Downlink Format
1729 SSR Playback completed
1759 S/C commanded to ADC Downlink Format
1800 Poke command sent to Active and Inactive C&DH
1804 AOS TT bins loaded
1820 EOT
BACK
Operations Day -- 153/1998 (2 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 153/1998 (June 2, 1998)
Mission Day -- 282
Orbit Number -- 98153
Pass Highlights: Station AOS LOS
DSS-16 1655 2031
Pass Summary: Routine pass with recorder dump, atttitude maneuver
and CRIS commanding
Anomalies: None
Activities:
16:55 DSS-16 AOS
17:03 SSR B put in Record Operate Mode
17:04 SSR A put in Playback Operate Mode
17:09 Cat bed heaters on
18:17 Attitude maneuver start time
18:21 Attitude maneuver end time
18:24 Cat bed heaters off
18:41 Spacecraft commanded to Science Downlink Format
19:32 CRIS instrument operations
20:07 Spacecraft commanded to ADC Downlink Format
20:31 DSS-16 LOS
BACK
Operations Day -- 154/1998 (3 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 154/1998 (June 3, 1998)
Mission Day -- 283
Orbit Number -- 98154
Pass Highlights: station AOS LOS
DSS-16 13:35:31 17:10:00
Pass Summary: Nominal pass.
Anomalies: None.
Activities:
1340 BOT w/ D16
1350 SSR A placed in RECORD mode
1351 SSR B placed in PLAYBACK mode
1352 Time Tag bins loaded for LOS
1428 S/C commanded to SCIENCE format
1601 SSR B playback completed
1646 S/C commanded to ADC format
1647 Poke commands issued to active and inactive CDH
1650 Time Tag bins loaded for next day AOS time
1710 EOT w/ D16
BACK
Operations Day -- 155/1998 (4 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 155/1998 (June 4, 1998)
Mission Day -- 284
Orbit Number -- 98155
Pass Highlights: station AOS LOS
DSS-16 1335 1710
Pass Summary: Routine pass with recorder dump. 4mm tape drive
problems caused the DPS daily backup to fail. The backup was eventually
completed when maintenance replaced the tape drive.
Anomalies: Antenna tracking problems at DSS-16 at beginning of
pass ( DR #G03806 ). TPOCC packet extractor crashed at 1451, stopping
data collection for about 8 minutes. All lost data recovered (G98-0062)
Activities:
1335 BOT w/ DSS16
1346 SSR B placed in RECORD mode
1347 SSR A placed in PLAYBACK mode
1348 Time Tag bins loaded for LOS
1404 S/C commanded to SCIENCE format
1612 SSR playback completed
1647 S/C commanded to ADC format
1647 Poke commands issued to active and inactive CDH
1650 Time Tag bins loaded for next day AOS time
1710 EOT w/ DSS16
BACK
Operations Day -- 156/1998 (5 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 156/1998 (June 5, 1998)
Mission Day -- 285
Orbit Number -- 98156
Pass Highlights: Station AOS LOS
DSS-66 11:57:00 15:10:00
Pass Summary:
Station Keeping maneuver 5 performed nominally.
During the Attitude Reorientation maneuver, FDF analysts described seeing
thrusters firing asynchronously which could cause excessive nutation. A
thruster abort was issued. The maneuver terminated on the 14th of 16 repeat
counts and was eventually determined to be successful (though terminated,
the result was near the original desired effect and with no signs of
excessive nutation). Following the thruster abort, the Attitude
Determination System (ADS) software calculated an incorrect spin rate of
3.75 instead of the nominal 4.99. Telemetry indicated that the spin rate
was 4.99.
At the time, this anomaly was determined to be a ground system anomaly
(TPOCC system lagging with page updates and ADS software computing
incorrect spin rate). On day 160 (June 9) it was thought to be a spacecraft
anomaly (see day 160 pass plan).
The spin rate is calculated using the sun pulse which the Command and Data
Handling (C&DH) system generates from sun sensor data. It was later
determined that the anomalous spin rate was due to incorrect sun pulse
generation (The C&DH processing of sun sensor data was in a frozen state).
While the FOT doesn't directly monitor this information, a valid sun pulse
is necessary to perform maneuvers and is used by science teams for tagging
data collection times and instrument cycles.
Anomalies:
G98-0063 - D66 experienced problems with the SCP - late AOS (17
min) -- DR L02166
G98-0064 - ADS system calculating incorrect spin rate.
NOTE: This anomaly became a spacecraft anomaly on day 160.
Activities:
1140 BOT w/D16
1157 Telemetry received - late AOS due to SCP problems at Site
1201 SSR A placed in RECORD mode
1202 SSR B placed in PLAYBACK mode
1203 Time Tag Bins loaded for LOS time
1205 Axial Catbed heaters enabled for SK-05
1206 Radial Catbed heaters enabled for Attitude maneuver
1315 SK-05 burn started
1321 Axial Catbed heaters disabled
1347 Attitude Maneuver Started
1350 Thruster Abort command issued due to Spin Rate discrepancy
1354 Telltale Clear issued to clear thruster abort
1431 S/C commanded to SCIENCE Format
1436 SWEPAM Ion and Electron weekly calibrations performed
1445 S/C commanded to ADC format
1446 Poke commands issued to active and inactive CDH
1451 Time Tag bins loaded for next day AOS
1510 LOS w/ D66
BACK
Operations Day -- 157/1998 (6 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 157/1998 (June 6, 1998)
Mission Day -- 286
Orbit Number -- 98157
Pass Highlights: station AOS LOS
DSS-66 1415 1752
Pass Summary: Routine pass with recorder dump and CRIS commanding
Anomalies: Attitude Determination Software unable to determine
attitude. Parameter ADS_SEP_SPIN shows value of 3.75 (correct value is
near 5).
NOTE: At the time, this was still considered to be a ground system
anomaly. See Daily report for day 156 and 160.
Activities:
1420 BOT w/ DSS66
1423 SSR B placed in RECORD mode
1423 SSR A placed in PLAYBACK mode
1425 Time Tag bins loaded for LOS
1449 S/C commanded to SCIENCE format
1555 Began CRIS commanding
1705 SSR playback completed
1729 S/C commanded to ADC format
1730 Poke commands issued to active and inactive CDH
1732 Time Tag bins loaded for next day AOS time
1752 EOT w/ DSS66
BACK
Operations Day -- 158/1998 (7 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 158/1998 (June 7, 1998)
Mission Day -- 287
Orbit Number -- 98158
Pass Highlights: station AOS LOS
DSS-16 14:00:19 17:35:00
Pass Summary:
Nominal support SSR B played back. ADS S/W still shows spin rate
of 3.75 while telemetry shows STAR Y rate = 29.82 which converts to a spin
rate of 4.97 (a nominal value).
Anomalies:
None
Activities:
1405 BOT w/ D16
1406 SSR placed in RECORD mode
1407 SSR placed in PLAYBACK mode
1408 Time Tag bins loaded for LOS
1410 ADS s/w started
1429 ADS s/w stopped
1431 S/C commanded to SCIENCE format
1637 SSR playback completed
1712 S/C commanded to ADC format
1713 Poke commands issued to active and inactive CDH
1716 Time Tag bins loaded for next day AOS time
1735 EOT w/
BACK
Operations Day -- 159/1998 (8 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 159/1998 (June 8, 1998)
Mission Day -- 288
Orbit Number -- 98159
Pass Highlights: station AOS LOS
DSS-66 12:20:00 15:50:00
Pass Summary:
Routine pass. Anomaly from day 156 is still being analyzed.
Anomalies:
None.
Activities:
12:20 BOT w/ D66
12:31 SSR B placed in RECORD mode
12:32 SSR A placed in PLAYBACK mode
12:32 Time Tag bins loaded for LOS
13:22 S/C commanded to SCIENCE format
14:38 S/C commanded to ADC format
15:01 S/C commanded to SCIENCE format
14:45 SSR A playback completed
15:35 S/C commanded to ADC format
15:36 Poke commands issued to active and inactive CDH
15:36 Time Tag bins loaded for next day AOS time
15:50 EOT w/ D66
BACK
Operations Day -- 160/1998 (9 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 160/1998 (June 9, 1998)
Mission Day -- 289
Orbit Number -- 98160
Pass Highlights: station AOS LOS
DSS-16 16:45:09 22:04:30
Pass Summary:
Continued to analyze the anomaly seen on day 156 (day of last
maneuver). Originally thought to be a ground system anomaly, it was
determined on day 159 to be a spacecraft anomaly.
Anomaly background: On day 156 a station keeping maneuver was
performed successfully. Following the SK maneuver, an attitude maneuver was
started.
During the attitude maneuver, data lead the analysts to believe
that the thrusters were not firing synchronously which would have caused
nutation. Following the issuing of a thruster abort command, the spin rate
generated by ADS was not as expected.
Upon further analysis, it was determined that the CDH component was
not processing the sun sensor data correctly. This was traced to a
potential timing problem in the CDH sun sensor processing code. Potenial
fixes are still being analyzed.
Current anlaysis of the sun sensor processing in the CDH has led to
questions regarding the validity of the sun pulse. The spin rate is
calculated using the sun pulse which the Command and Data Handling (C&DH)
system generates from sun sensor data. It was determined that the anomalous
spin rate was due to incorrect sun pulse generation (The C&DH processing of
sun sensor data was in a frozen state). While the FOT doesn't directly
monitor this information, a valid sun pulse is necessary to perform
maneuvers and is used by science teams for tagging data collection times
and instrument cycles.
Some attempts have been made to correct the problem (while avoiding
severely affecting the nominal s/c operations) without much success.
Further attempts will be made in order of increasing severity.
In the mean time, the s/c High Gain Antenna field of view is
drifting out of view. A maneuver was originally scheduled for day 161 to
bring the HGA back into view. Nominally, all attitude reorientation burns
have been executed using a valid sun pulse as the reference.
Attempts at correcting the anomaly included: cycling the data
formats, sending an unlock command, and sending a thruster abort command
and the associated telltale clear command.
In addition, initial steps were taken to allow future, more severe
steps to be accomplished. The memory location of the suspect sun sensor
processing state was dumped with the hopes that the location can be poked
later with the correct processing state.
The information in this memory location was not as expected.
Analysis is ongoing.
The Last Resort Timer is usually reset at the beginning and end of
every pass on both the active and inactive CDH's. As a last resort, this
timer will cause a CDH reset after 96 hours have expired since the last
reset.
The potential need to have the CDH reset to fix the anomaly has
resulted in the active CDH Last Resort Timer to NOT be reset. Thus a CDH
reset would occur at 15:36 on Friday, June 12 (96 hours from last reset).
This can be reset at any time during a pass.
In addition, the current method of switching data rates with s/c
time tag bins has been changed. Due to the HGA being out of view, the high
data rate cannot be supported and thus the recorder cannot be dumped again
until the HGA is back in view.
This can only be accomplished by a maneuver or by naturally
drifting back into view. Until a maneuver can be accomplished, the s/c
antenna configuration has been changed to allow view over a longer period
of time (approx. two weeks).
This antenna configuration limits the spacecraft operations to
being performed in the low data rate.
NOTE: THIS ANOMALY WAS EVENTUALLY RESOLVED ON DAY 163! SEE DAILY REPORT.
Anomalies:
Packet Extractor Crash - ACE Anomaly Report #G98-0065
DR#G03819 - Front end problem at site - ACE Anomaly Report #G98-0066
Activities:
16:45 BOT w/ DSS-16
16:52 Poke command to inactive CDH only
16:52 SSR placed in RECORD mode
16:53 SSR placed in PLAYBACK mode
N/A Time Tag bins loaded for LOS
17:27 S/C commanded to SCIENCE format
17:34 Housekeeping formats cycled to analyze anomaly
17:37 Unlock command sent to jostle CDH
17:41 Thruster Abort command sent to jostle sun sensor timing process
17:49 Telltale Clear issued to clear Fire Abort indicator
18:04 Procedure run to dump memory location of sun sensor processing state
18:30 Command issued to dump sections of memory - aborted due to tlm
dropouts
19:47 Packet Extractor Crashed - ACE Anomlay report #G98-0065
19:52 System software back up
19:52 SSR playback terminated (slices lost: 555-676)
19:55 Extended pass with DSS-16 to EOT at 20:50
20:00 SSR B segment 0 redefined to allow maximum recording time across
both recorders.
20:16 Poke command issued to inactive CDH only
20:24 S/C commanded to ADC format
N/A Time Tag bins loaded for next day AOS time
20:22 DR#G03819 - Front end problem at site - possible RFI - ACE Anomaly
Report #G98-0066
20:27 Switch to low rate RTSW
20:37 Extended pass with DSS-16 to EOT at 22:20
21:17 Cycled low rate formats between LR_HSKPG, LR_ADC, RTSW
21:32 Antenna reconfiguration - rf_act_to_mz160
21:38 Antenna reconfiguration - rf_inact_to_pz160
21:43 Return to RTSW
22:04 EOT w/ DSS-16
BACK
Operations Day -- 161/1998 (10 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 161/1998 (June 10, 1998)
Mission Day -- 290
Orbit Number -- 98161
Pass Highlights: station AOS LOS
DSS-66 1236 1720
Pass Summary: Instrument power-downs, thruster command
checkout, memory dump, and telemetry analysis in preparation for C&DH A
reset planned for Day 163. No recorder dump or recording.
Anomalies: 18-minute telemetry dropout due to SPC 60 error
at JPL. DR#N46780
Activities:
12:40 BOT w/ DSS66
12:48 Spacecraft commanded to Low Rate Housekeeping format
12:51 Spacecraft commanded to Low Rate ADC format
12:57 Telemetry dropout (DR#N46780)
13:15 Telemetry resumed
13:40 Inactive transmitter reconfigured to +Z broadbeam antenna
13:52 Active transmitter reconfigured to High Gain Antenna
13:57 Spacecraft commanded to 6944 bps medium rate Science
downlink format
14:06 Spacecraft commanded to Memory Dump format
14:09 Spacecraft commanded to medium rate ADC format
14:26 Thruster setup, abort and Telltale Clear (no thruster firing)
14:37 Spacecraft commanded to Memory Dump format and began C&DH A
memory dump
14:53 Began SEPICA power down sequence (OCR SEP_021)
15:18 Began SWIMS power down sequence (OCR SWM_003)
15:25 Began SWICS power down sequence (OCR SWX_004)
16:58 Began ULEIS high-voltage power down sequence (OCR ULEIS_005)
17:20 Active transmitter reconfigured to -Z broadbeam Antenna
17:20 Inactive transmitter reconfigured to +Z broadbeam antenna
18:05 Spacecraft commanded to Low Rate ADC downlink format
18:09 Spacecraft commanded to 434 bps RTSW format
18:20 EOT w/ DSS66
BACK
Operations Day -- 162/1998 (11 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 162/1998 (June 11, 1998)
Mission Day -- 291
Orbit Number -- 98162
Pass Highlights: station AOS LOS
DSS-24 1350 2005
Pass Summary: Memory dump and telemetry analysis in
preparation for C&DH A reset planned for Day 163. No recorder dump.
Recorder SSR A filled up overnight and SSR B automatically began recording.
Tried cycling sun sensor off/on and C&DH A to Reduced/Full Data Collection
and Disabled/enabled to "jostle" C&DH into generating correct sun pulses
(Changing the data collection to reduced causes spin clock and sun pulse
signals to be left inactive while disabling data collection causes sun
pulse signals not to be collected). This was not effective as sun pulses
were still not being generated correctly and the "stuck" telemetry bits
remained unchanged.
Anomalies: None.
Activities:
14:05 BOT w/ DSS24
14:15 Spacecraft commanded to Low Rate Housekeeping format
14:17 Spacecraft commanded to Low Rate ADC format
14:30 Spacecraft commanded to 6944 bps medium rate Science
downlink format
14:33 Telltale Clear command sent to clear flag from fired
autonomy bin
14:45 Spacecraft commanded to Memory Dump format. Memory dump begun
16:57 Spacecraft commanded to medium rate SCIENCE format
17:12 Began SWEPAM processor halt sequence (OCR SWPX-002)
17:24 Spacecraft commanded to medium rate ADC format
17:55 Data Collection cycled from full/reduced/full
18:12 Data Collection cycled from enabled/disabled/enabled
18:31 Sun Sensor A cycled OFF and ON
18:41 Spacecraft commanded to Memory Dump format and began C&DH A
memory dump
19:18 Commanding switched to inactive C&DH
19:24 Last Resort Reset Memory Poke command sent to inactive C&DH
19:25 Commanding switched to active C&DH
19:40 Spacecraft commanded to 434 bps LR_ADC format
19:32 Active transmitter reconfigured to -Z broadbeam Antenna
19:40 Inactive transmitter reconfigured to +Z broadbeam antenna
19:49 Spacecraft commanded to 434 bps RTSW format
20:05 EOT w/ DSS24
BACK
Operations Day -- 163/1998 (12 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 163/1998 (June 11, 1998)
Mission Day -- 292
Orbit Number -- 98163
Pass Highlights: station AOS LOS
DSS-66 13:51:00 17:15:00
DSS-16 17:15:00 19:30:00
Pass Summary:
Scheduled CDH reset not executed - Memory poke to EEPROM address H'EE58' on
RAM page 1 executed successfully. This poke to the C&DH memory appeared to
change the sun sensor processing state and valid sun pulses are being
generated. The Last Resort Timer was then reset about an hour before the
C&DH A reset would have taken place. An engineering burn was executed
following the receipt of valid sun pulses to make sure everything is
operating nominally. A larger maneuver was then executed to bring ACE back
into the HGA constraint. It was determined that SSR B should be placed in
RECORD and all data from SSR A should be dumped. All Data on SSR B will be
lost. Dumped SSR A data, abort bit issued and remainder of data will be
retrieved on Day 164. It was attempted to command some instruments back to
their nominal state. Returning instruments to their nominal states will be
a priority over the next week.
Anomalies: None.
Activities:
1351 AOS w/D66
1355 BOT w/D66
1413 Inactive RF reconfigured to -Z broadbeam
1427 Active RF reconfigured to HGA
1430 S/C commanded to ADC format
1436 Memory Poke command issued to a address H'EE58' ram page 1 data H'0000'
1439 Last resort timer reset to CDH A
1441 Radial catbed heaters enabled for Attitude Maneuver
1559 Abort Bit issued to SSR B - All previous data on recorder unrecoverable
1600 SSR B placed in RECORD mode
1603 SSR A placed in PLAYBACK mode
1701 Attitude maneuver of 6 pulses started
1702 Attitude maneuver completed
1715 Station Handover - AOS from D16
1745 Atttiude maneuver of 35 pulses started
1752 Attitude maneuver completed
1757 Radial catbeds disabled
1800 Station 66 LOS - Released
1807 Executed OCR# SWPX-003 for HV ramp up of SWEPAM ION and SWEPAM Electron
1825 S/C commanded to SCIENCE format
1855 Completion of OCR SWPX-003 (SWEPAM instruments HV ramped up - ION
inst. collecting RTSW
1911 S/C commanded to ADC format
1912 Poke commands issued to active and inactive CDH
1917 ABORT Bit issued to SSR A - Remainder of Data to be dumped on Day 164
1927 S/C commanded to RTSW
1930 LOS w/ D16
BACK
Operations Day -- 164/1998 (13 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 164/1998 (June 12, 1998)
Mission Day -- 293
Orbit Number -- 98164
Pass Highlights: station AOS LOS
DSS-16 14:58:00 18:30:00
Pass Summary:
Completed Playback of SSR A from day 163 (Slices 761 to 1023 plus
redumps of missing data) - Started playback of SSR B (completed 447 slices
of 582) Remainder to be played back on Day 165. Executed OCR SWM-005 and
SWX-006 for HV ops for SWICS and SWIMS
Anomalies:
None.
Activities:
1500 BOT w/ D16
1504 Time Tag bins loaded for LOS
1506 Started playback of remaining slices from SSR A (Slices 761-1023)
1622 Completed Playback of SSR A
1623 SSR A placed in RECORD mode
1627 SSR B placed in PLAYBACK mode
1631 S/C commanded to SCIENCE format
1708 Started execution of OCR SWM-005 and SWX-006 for SWICS and SWIMS HV
adjustment and ramp up
1754 Completed SWICS and SWIMS commanding
1803 S/C commanded to ADC format
1804 Poke commands issued to active and inactive CDH
1807 Time Tag bins loaded for next day AOS time
1821 Abort Bit issued to SSR B - 447 of 582 slices played back
1830 EOT w/ D16
BACK
Operations Day -- 165/1998 (14 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 165/1998 (June 13, 1998)
Mission Day -- 294
Orbit Number -- 98165
Pass Highlights: station AOS LOS
DSS-66 14:37:38 18:10:00
Pass Summary:
Completed playback of remaining slices of SSR B (slices 448 -582)
- Completed playback of SSR A - All SSR operations are now back to
nominal state. High Voltage adjustments for SWICS and SWIMS performed.
Anomalies:
Activities:
1440 BOT w/ D66
1444 Time Tag bins loaded for LOS
1446 Started playback of Remaining Slices on SSR B (slices 448 - 582)
1521 Completed playback of SSR B
1522 SSR B placed in RECORD mode
1524 SSR A placed in PLAYBACK mode
1526 S/C commanded to SCIENCE format
1559 Began execution of OCR's SWM-005 and SWX-006 for HV adjustement
and Configuration
1603 Completed SWIMS and SWICS commnanding for Day
1747 SSR playback completed
1755 S/C commanded to ADC format
1756 Poke commands issued to active and inactive CDH
1758 Time Tag bins loaded for next day AOS time
1810 EOT w/ D66
BACK
Operations Day -- 166/1998 (15 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 166/1998 (June 15, 1998)
Mission Day -- 295
Orbit Number -- 98166
Pass Highlights: station AOS: 12:50 LOS: 16:20
DSS-61
Pass Summary: Continued instrument commanding to SWICS,SWIMS and
SEPICA.
Anomalies: None.
Activities:
12:50:00 BOT
12:53:35 SSR-A placed in RECORD mode
12:54:18 SSR-B placed in PLAYBACK mode
12:55:34 Time Tag bins loaded for LOS
13:21:00 S/C commanded to SCIENCE format
15:47:00 S/C commanded to ADC format
15:47:49 Poke commands issued to active and inactive CDH
15:50:29 Time Tag bins loaded for next day AOS time
16:20:00 EOT
BACK
Operations Day -- 167/1998 (16 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 167/1998 (June 16, 1998)
Mission Day -- 296
Orbit Number -- 98167
Pass Highlights: station AOS: 14:15 LOS: 17:45
DSS-16
Pass Summary: Commanded to SWICS and ULEIS instruments.
Anomalies: NONE
Activities:
14:15:00 BOT
14:17:35 SSR-B placed in RECORD mode
14:18:20 SSR-A placed in PLAYBACK mode
14:19:40 Time Tag bins loaded for LOS
14:44:00 S/C commanded to SCIENCE format
16:53:00 SSR playback completed
17:27:45 S/C commanded to ADC format
17:26:00 Poke commands issued to active and inactive CDH
17:29:09 Time Tag bins loaded for next day AOS time
17:45:00 EOT
BACK
Operations Day -- 168/1998 (17 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 168/1998 (June 17, 1998)
Mission Day -- 297
Orbit Number -- 98168
Pass Highlights: Station AOS: 15:45 LOS: 19:15
DSS-16
Pass Summary:
Routine pass with two successful maneuvers completed.
Anomalies:
Two telemetry drops due to RFI (anomaly report #G98-0067) covered
by DSN DR G03836.
Activities:
15:45:00 BOT
15:57:00 Active and inactive C&DH's poked
16:01:31 LOS TT Bin Loaded
16:04:03 Catbed heaters on
17:12:52 Maneuver number 1 started
17:16:41 Maneuver number 1 completed
18:05:28 Maneuver number 2 started
18:09:20 Maneuver number 2 completed
18:25:00 Science downlink format
18:45:02 Active C&DH poked
18:46:11 Inactive C&DH poked
18:48:28 AOS TT Bin Loaded
19:15:00 EOT
BACK
Operations Day -- 169/1998 (18 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 169/1998 (June 18, 1998)
Mission Day -- 298
Orbit Number -- 98169
Pass Highlights: station AOS: 15:00 LOS: 18:30
DSS-16
Pass Summary: Routine pass with SSR dump from previous day
completed and successful commanding to the SWICS instrument.
Anomalies:
Activities: NONE
15:00:00 BOT
15:19:00 Redump of slices 293 to 352 on SSR-B from previous day
completed
15:21:02 SSR-B placed in RECORD mode
15:22:08 SSR-A placed in PLAYBACK mode
15:24:01 Time Tag bins loaded for LOS
15:25:39 S/C commanded to SCIENCE format
15:30:00 SWX_HV_ADJ Proc started
15:40:00 SWX_HV_ADJ Proc ended
17:30:00 SWX_HV_ADJ Proc started
17:40:00 SWX_HV_ADJ Proc ended
17:46:00 SSR playback completed
18:01:00 S/C commanded to ADC format
18:02:00 Poke commands issued to active and inactive CDH
18:04:57 Time Tag bins loaded for next day AOS time
18:30:00 EOT
BACK
Operations Day -- 170/1998 (19 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 170/1998 (June 19, 1998)
Mission Day -- 299
Orbit Number -- 98170
Pass Highlights: station AOS: 15:28 LOS: 18:30
DSS-66
Pass Summary: Nominal pass with SWEPAM calibrations
Anomalies: Station used wrong TGC software causing TPOCC to cease
correct data decommutation. Became necessary to recycle TPOCC in order to
resolve the problem. Covered under DR#L02232.
(See anomaly report G98-0068)
Activities:
15:28:00 BOT
15:31:48 SSR-A placed in RECORD mode
15:32:31 SSR-B placed in PLAYBACK mode
15:33:39 Time Tag bins loaded for LOS
15:57:52 S/C commanded to SCIENCE format
18:11:50 S/C commanded to ADC format
18:12:52 Poke commands issued to active and inactive CDH
18:13:08 Time Tag bins loaded for next day AOS time
18:30:00 EOT
BACK
Operations Day -- 171/1998 (20 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 171/1998 (June 20, 1998)
Mission Day -- 300
Orbit Number -- 98171
Pass Highlights: station AOS: 16:20 LOS: 19:50
DSS-16
Pass Summary: Nominal pass.
Anomalies: NONE
Activities:
16:20:00 BOT
16:48:52 SSR-B placed in RECORD mode
16:49:52 SSR-A placed in PLAYBACK mode
16:51:15 Time Tag bins loaded for LOS
16:51:58 S/C commanded to SCIENCE format
19:03:12 Block Bin Dump Complete
19:20:00 SSR playback completed
19:29:57 S/C commanded to ADC format
19:30:00 Poke commands issued to active and inactive CDH
19:33:10 Time Tag bins loaded for next day AOS time
19:50:00 EOT
BACK
Operations Day -- 172/1998 (21 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 172/1998 (June 21, 1998)
Mission Day -- 301
Orbit Number -- 98172
Pass Highlights: station AOS: 15:30 LOS: 18:55
DSS-66
Pass Summary: Nominal pass.
Anomalies: NONE
Activities:
15:30:00 BOT
15:32:37 SSR-A placed in RECORD mode
15:34:33 SSR-B placed in PLAYBACK mode
15:35:50 Time Tag bins loaded for LOS
15:44:33 S/C commanded to SCIENCE format
17:55:00 SSR playback completed
18:32:22 S/C commanded to ADC format
18:33:00 Poke commands issued to active and inactive CDH
18:35:43 Time Tag bins loaded for next day AOS time
18:55:00 EOT
BACK
Operations Day -- 173/1998 (22 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 173/1998 (June 22, 1998)
Mission Day -- 302
Orbit Number -- 98173
Pass Highlights: Station AOS LOS
DSS-66 1311 1640
Pass Summary: Recorder dump and two-part attitude maneuver.
Anomalies: Voice communications with DSS-66 were lost partway
through the pass.
Activities:
13:11 BOT
13:12 Active and inactive C&DH's poked
13:13 SSR-B placed in RECORD mode
13:14 SSR-A placed in PLAYBACK mode
13:16 Time Tag bins loaded for LOS
13:17 Catbed heaters on
14:29 Maneuver part 1 started
14:33 Maneuver part 1 completed
15:16 Maneuver part 2 started
15:19 Maneuver part 2 completed
15:22 Catbed heaters off
15:34 Science downlink format
16:19 Active C&DH poked
16:20 Inactive C&DH poked
16:25 AOS TT Bin Loaded
16:40 EOT
BACK
Operations Day -- 174/1998 (23 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 174/1998 (June 23, 1998)
Mission Day -- 303
Orbit Number -- 98174
Pass Highlights: station AOS LOS
DSS-66 14:35:13 18:10:00
Pass Summary:
Nominal Support - SSR B playback - Scama 272 Voice lines back
on-line.
Anomalies: Black Phone x1974-x1975 outage due to center wide phone
problems
Activities:
1440 BOT w/ D66
1443 SSR A placed in RECORD mode
1444 SSR B placed in PLAYBACK mode
1445 Time Tag bins loaded for LOS
1458 S/C commanded to SCIENCE format
1720 SSR B playback completed
1749 S/C commanded to ADC format
1750 Poke commands issued to active and inactive CDH
1752 Time Tag bins loaded for next day AOS time
1810 EOT w/ D66
BACK
Operations Day -- 175/1998 (24 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 175/1998 (June 24, 1998)
Mission Day -- 304
Orbit Number -- 98175
Pass Highlights: station AOS LOS
DSS-66 1322 1656
Pass Summary: Routine pass with recorder dump.
Anomalies: Workstation AC2WS2 in the MAR needed to have the CPU
replaced. This prevented FORMATS from delivering products.
Activities:
13:22 BOT w/ DSS66
13:26 SSR B placed in RECORD mode
13:27 SSR A placed in PLAYBACK mode
13:28 Time Tag bins loaded for LOS
13:43 S/C commanded to SCIENCE format
15:46 SSR playback completed
16:33 S/C commanded to ADC format
16:33 Poke commands issued to active and inactive CDH
16:34 Time Tag bins loaded for next day AOS time
16:56 EOT w/ DSS66
BACK
Operations Day -- 176/1998 (25 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 176/1998 (June 25, 1998)
Mission Day -- 305
Orbit Number -- 98176
Pass Highlights: station: DSS-66 AOS LOS
14:49:00 18:20:00
Pass Summary: Routine pass with packet extractor crashes due to
station sending out duplicate data.
Anomalies:
G98-0071- Station 66 sent out duplicate data from 14:50 to 15:20.
This caused TPOCC to crash. They first tried to take TGC channel 2 and put
it in record, and this didn't work. Next they disabled channel 2 and this
removed the duplicate data.
Activities:
14:50:00 BOT w/ DSS
14:50:00 Anomaly G98-0071 started - Duplicate frames seen
14:53:00 SSR A placed in RECORD mode
14:54:00 SSR B placed in PLAYBACK mode
14:55:00 Time Tag bins loaded for LOS
15:20:00 Anomaly G98-0071 resolved - Valid telemetry seen again.
15:27:00 S/C commanded to SCIENCE format
17:53:00 SSR B playback completed
18:01:00 S/C commanded to ADC format
18:02:00 Poke commands issued to active and inactive CDH
18:05:00 Time Tag bins loaded for next day AOS time
18:20:00 EOT w/ DSS
BACK
Operations Day -- 177/1998 (26 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 177/1998 (June 26, 1998)
Mission Day -- 306
Orbit Number -- 98177
Pass Highlights: Station AOS LOS
DSS-61 1333 1700
Pass Summary: Routine pass with attitude maneuver and recorder
dump and weekly SWEPAM calibrations performed.
Anomalies:
Activities:
13:33:00 BOT DSS-61
13:34:00 Active and inactive C&DH's poked
13:35:00 SSR-B placed in RECORD mode
13:36:00 SSR-A placed in PLAYBACK mode
13:38:00 Time Tag bins loaded for LOS
13:40:00 Catbed heaters on
14:44:00 Maneuver started
14:48:00 Maneuver completed
14:51:00 Catbed heaters off
15:09:00 Science downlink format
15:10:00 Weekly SWPE calibration
15:11:00 Weekly SWPI calibration
16:35:00 Active C&DH poked
16:35:00 Inactive C&DH poked
16:38:00 AOS TT Bin Loaded
17:00:00 EOT DSS-61
BACK
Operations Day -- 178/1998 (27 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 178/1998 (June 27, 1998)
Mission Day -- 307
Orbit Number -- 98178
Pass Highlights: station: DSS-61 AOS LOS
13:27:44 17:10:00
Pass Summary: Today's ACE pass was changed late yesterday due to
another spacecraft's request for emergency support to analyze their
anomaly. This resulted in the spacecraft switching to high rate 5 minutes
prior to the old pass start time (12:50) which means that for approximately
43 minutes, NOAA would not have received data as ACE was in the high data
rate. The change in pass time did not affect flight operations. There was a
packet extractor crash which caused an eight minute outage. SSR data was
recovered successfully.
Anomalies:
G98-0072 - TPOCC packet extractor crash caused telemetry outage
from 14:45 to 14:53
Activities:
12:45:00 Time tag bin fired to switch to 87648 ADC downlink format
13:40:00 BOT w/ DSS
13:49:00 SSR A placed in RECORD mode
13:50:00 SSR B placed in PLAYBACK mode
13:51:00 Time Tag bins loaded for LOS
13:53:00 ADS software started
14:02:00 ADS software terminated
14:03:00 S/C commanded to SCIENCE format
14:20:00 Active C&DH block bin dump started
14:45:00 Anomaly G98-0072
14:59:00 Active C&DH block bin dump restarted
15:17:00 VC1 drop occurred, block bin dump restarted
15:32:00 VC1 drop occurred, block bin dump aborted
15:34:00 Science format started again
16:28:00 SSR B playback completed
16:50:00 S/C commanded to ADC format
16:50:00 Poke commands issued to active and inactive CDH
16:53:00 Time Tag bins loaded for next day AOS time
17:10:00 EOT w/ DSS
BACK
Operations Day -- 179/1998 (28 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 179/1998 (June 28, 1998)
Mission Day -- 308
Orbit Number -- 98179
Pass Highlights: station: DSS-16 AOS LOS
1455 1830
Pass Summary: Routine pass with recorder dump
Anomalies: None
Activities:
14:55:00 BOT w/ DSS16
15:03:00 SSR B placed in RECORD mode
15:04:00 SSR A placed in PLAYBACK mode
15:05:00 Time Tag bins loaded for LOS
15:17:00 S/C commanded to SCIENCE format
17:39:00 SSR playback completed
18:05:00 S/C commanded to ADC format
18:06:00 Poke commands issued to active and inactive CDH
18:08:00 Time Tag bins loaded for next day AOS time
18:30:00 EOT w/ DSS16
BACK
Operations Day -- 180/1998 (29 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 180/1998 (June 29, 1998)
Mission Day -- 309
Orbit Number -- 98180
Pass Highlights: station: DSS-66 AOS LOS
13:55:18 17:30:00
Pass Summary: Nominal pass.
Anomalies:
None
Activities:
14:00:00 BOT w/ DSS 66
14:03:00 SSR A placed in RECORD mode
14:04:00 SSR B placed in PLAYBACK mode
14:04:00 Time Tag bins loaded for LOS
14:18:00 S/C commanded to SCIENCE format
16:25:00 SSR B playback completed
17:04:00 S/C commanded to ADC format
17:05:00 Poke commands issued to active and inactive CDH
17:07:00 Time Tag bins loaded for next day AOS time
17:30:00 EOT w/ DSS 66
BACK
Operations Day -- 181/1998 (30 June 98)
ACE FLIGHT OPERATIONS DAILY REPORT
Operations Day -- 181/1998 (June 30, 1998)
Mission Day -- 310
Orbit Number -- 98181
Pass Highlights: station: DSS-16 AOS LOS
15:55:20 19:30:00
Pass Summary: Nominal Support with one ground system anomaly written.
Anomalies:DR G03882, AR 98-0073 Station SCP hung, reboot cleared
problem. Five min. 7 sec recoverable data loss.
Activities:
16:00:00 BOT w/ DSS 16
16:03:37 SSR placed in RECORD mode
16:04:20 SSR placed in PLAYBACK mode
16:12:00 Time Tag bins loaded for LOS
16:20:26 S/C commanded to SCIENCE format
18:19:45 SSR playback completed
17:18:55 S/C commanded to ADC format
19:06:30 Poke commands issued to active and inactive CDH 190630 and
190646z
19:09:00 Time Tag bins loaded for next day AOS time
19:30:00 EOT w/ DSS16
BACK