GE-12/15/97
E11 Science Data Losses
306-16:41 --->349-08:26; Lost TFs in brackets[.....] Changes in Bold
Time (GMT) DSS Reference RT Rcvd Events Comments Cause Pass
TFs #
Lost from
PPT
306-22:24 14 DR# 41 2 - The sta - Lost TFs A 2946
G02932 utilized the [46366 ->
-> b/u maser for 46369, 46371,
support. 46373 &
307-02:25 46374, 46385
& 46386,
46395 ->
46426] 159
RTS & 5
Priority
VCDUs
**Recovered
TFs [46385 &
46386] from
the .btd PPT
file - 8 RTS
VCDUs
307-03:01 43 DR# 11 0 - Unknown - Lost TFs U/A 2946
A01947 [46442 ->
-> 03:41 - The low 46450, 46452,
signal level 46465] 41 RTS
input to the VCDUs
array from
DSS14 may have
been a
contributing
factor to this
outage.
307-14:21 43 1 0 - Rate change - Lost TF S 2946
60-32bps [46798] 2 RTS
& 2 Priority
VCDUs
307-18:18 63 DR# 23 0 - Heavy rain - Lost TFs W 2946
L01551 [46844 ->
-> 21:16 46846, 46849
-> 46853,
46862, 46869
-> 46882] 67
RTS & 4
Priority
VCDUs
308-02:27 43 DR# 4 0 - Rate change - Lost TFs S 2947
A01954 60-120bps [46941 ->
-> 02:38 46944] 15 RTS
& 1 Priority
VCDUs
308-07:51 43 DR# 21 0 - FSR2 halted - Lost TFs S 2947
A01955 operation and [47122 ->
-> 08:25 was unable to 47141] 80 RTS
be restored. VCDUs
Also Rain may
have played a
part in the
outage as
shortly after
(1 TF time)
rain started
to degrade the
signal.
308-08:27 43 DR# 37 1 - Heavy rain - - Lost TFs W 2947
A01956 monsoon [471 43 & 471
-> 12:20 44, 471 97 ->
47223, 47265,
47273 ->
47278, 47303]
103 RTS & 3
Priority
VCDUs
**Recovered
TF [47265]
from .btd PPT
file 4 RTS
VCDUs
309-02:24 43 DR# 331 233 - Continuous - Lost TFs S 2948
A01959 GTC problems [47434 ->
-> 14:26 of a 47471, 47475
non-specific -> 47477,
nature 47481 ->
affected the 47483, 47487
entire -> 47506,
support. After 47510 ->
on GTC reload 47524, 47528
39 TFs were -> 47530,
forwarded to 47534 ->
JPL. 47536, 47540
-> 47542,
47546 ->
47548, 47552
-> 47577,
47580 ->
47582, 47586
-> 47588,
47592 ->
47594, 47595
->47803] 1179
RTS & 18
Priority
VCDUs
**Recovered
TFs [47475 ->
47477, 47481
-> 47483,
47487 ->
47506, 47510
-> 47524,
47528 ->
47530, 47534
-> 47536,
47540 ->
47542, 47546
-> 47547548,
47552 ->
47554, 47580
-> 47582,
47586 ->
47588, 47592
-> 47504,
47601, 47603,
47607, 47610,
47613 ->
47755, 47771
-> 47801]
from .btd PPT
file -- 16
Priority
VCDUs & 803
RTS VCDUs **
310-02:34 43 DR# 14 0 - The BTD hung - Lost TFs S 2949
A01965 and required a [47909 ->
-> 03:07 reboot to 47920, 47924
restore & 47925] 56
operability. RTS & 1
Priority
VCDUs
Time (GMT) DSS Reference RT Rcvd Events Comments Cause Pass
TFs #
Lost from
PPT
310-06:02 43 DR# 71 0 - The station - Lost TFs S 2949
A01966 reported low [48013 ->
-> 06:07 snr as DSS's 48015, 48039,
42 & 34 were 48060 ->
06:57 unable to 48126] 217
maintain RTS & 5
07:45 signal detect. Priority
During the VCDUs
-> 10:18 period of the
outage DSS's
42 & 34 were
removed from,
and restored
to, the array.
After restoral
to the array
of DSS42 tlm
locked up once
again,
310-06:12 43 DR# 5 1 - Rate change - Lost TF JN 2949
A01967 160-120bps [48018] 4 RTS
11:12 VCDUs
- Rate change
-> 11:22 120-80bps - Lost TFs
[48151 ->
12:16 - Rate change 48153] 12 RTS
80-60bps VCDUs
- Lost TF
[48170] 3 RTS
& 1 Priority
VCDUs
Recovered TF
[48018] from
.btd PPT file
--4 RTS VCDUs
310-13:24 43 2 0 - Rate change - Lost TFs JN 2949
60-40bps [48185 &
-> 13:36 48186] 8 RTS
VCDUs
310-14:03 43 1 0 - Rate change - Lost TF JN 2949
40-20bps [48191] 3 RTS
& 1 Priority
VCDUs
310-21:07 63 DR# 3 0 -Antenna to - Lost TFs A 2949
L01565 brake at pad # [48251 ->
-> 21:29 3. The antenna 48253] 3 RTS,
was moved past 1 Priority, &
the debris and 1 RRCC VCDUs
resumed
tracking by
21:07z.
310-21:55 14 DR# 5 0 - Unscheduled - Lost TF A 2950
N44491 mode changes [48257] 4 RTS
22:29 due to: VCDUs
311-00:46 1) DSS63 to - Lost TF
brake [48262] 4 RTS
-> 01:06 VCDUs
2)
Uncompensated - Lost TFs
uplink sweep [48282 ->
by DSS14 48284] 12 RTS
VCDUs
311-02:08 43 DR# 54 0 - A frequency - Lost TFs SPA 2950
A01970 offset was [49294 ->
-> 04:38 necessary to 48347] 160
compensate for RTS & 4
encounter Priority
dynamics. The VCDUs
correct
frequency
offset
required some
tweaking
before it was
identified.
311-05:32 43 DR# 8 0 - Rate change - Lost TFs JN 2950
A01972 120-80bps [48371 &
-> 05:39 48372] 7 RTS
- Rate change & 1 Priority
06:06 80-60bps VCDUs
-> 06:14 - Rate change - Lost TFs
60-80bps [48381 &
07:04 48382] 6 RTS
- Rate change VCDUs
-> 07:16 80-60bps
- Lost TFs
09:26 [48395 &
48395] 5 RTS
-> 09:34 VCDUs
- Lost TFs
[48435 &
48436] 6 RTS
VCDUs
311-08:18 43 DR# 6 3 - PEC angle - Lost TFs JN 2950
A01974 <.10 degrees [48415,
08:31 48419, 48425
-> 48431] 13
09:05 RTS & 1
Priority
-> 09:16 VCDUs
**Recovered
TFs [48425,
48427 &
48428] from
.btd PPT file
-- 12 RTS
VCDUs
312-06:06 43 1 0 - Rate change - Lost TF JN 2951
40-20bps [48583] 4 RTS
VCDUs
312-16:35 63 3 3 - The FCD1 - Lost TFs S 2952
never achieved [48619, 48622
18:18 lock during & 48623] 8
this support. RTS & 2
-> 18:52 The GTC merge Priority
anomaly VCDUs
probably
accounted for **Recovered
the loss of from .btd PPT
the three TFs file**
accounted for
in this entry.
The PPT may
include them.
Time (GMT) DSS Reference RT Rcvd Events Comments Cause Pass
TFs #
Lost from
PPT
313-02:06 43 1 0 - Rate change - Lost TF JN 2952
40-120bps [48678] 3 RTS
& 1 Priority
VCDUs
313-02:14 43 DR# 2 0 - PEC angle < - Lost TF JN 2952
A01978 .10 degree [48680] 4 RTS
02:23 VCDUs
- Lost TF
[48684] 4 RTS
VCDUs
314-12:33 43 1 0 - Rate change - Lost TF JN 2952
80-60bps [49063] 4 PB
VCDUs
314-13:32 43 2 0 - Rate change - Lost TF JN 2953
60-40bps [49076] 4 PB
13:47 VCDUs
- Rate change
40-20bps - Lost TF
[49078] 4 PB
- PEC angle < VCDUs
.10 degrees
315-04:52 43 1 0 - Rate change - Lost TF JN 2953
160-120bps [49280] 4 PB
VCDUs
- PEC angle <
.10 degrees
316-04:34 43 2 0 - The station - Lost TFs U 2955
was late [49621 &
-> 04:38 acquiring 49622] 6 PB &
signal detect 2 Priority
after VCDUs
completion of
the Delta DOR.
316-07:47 43 4 2 -PEC angle < - Lost TFs JN 2955
.10 degrees [49689 ->
-> 08:00 49692] 15 PB
& 1 Priority
VCDUs
**Recovered
TFs [49689 &
49692] from
the .btd PPT
file** 8 PB
VCDUs
317-08:28 43 3 0 - PEC angle < - Lost TFs JN 2956
.10 degrees [50034 &
-> 08:35 50035] 8 PB
VCDUs
08:39
- Lost TF
[50037] 4 PB
VCDUs
318-02:43 43 2 0 - Rate change - Lost TFs JN 2957
60-80bps [50257 &
-> 02:47 50258] 8 PB
VCDUs
318-09:57 43 21 6 - PEC angle - Lost TFs JN 2957
<.10 degrees [50386,
-> 13:30 50393, 50395,
50402 &
50403, 50406
& 50407,
50417 ->
50419, 50424,
50426 &
50427, 50433,
50437 ->
50434] 83 PB
& 1 Priority
VCDUs
**Recovered
TFs [50393,
50424, 50426,
50427, 50439,
& 50434] from
the .btd PPT
file. 24 PB
VCDUs
318-12:30 43 1 0 - Rate change - Lost TF JN 2957
80-60bps [50430] 4 PB
VCDUs
321-01:46 43 DR# 92 - DSS43 was - Lost TFs U 2960
A02003 unable to [51191 ->
-> 05:35 provide tlm 51282] 361 PB
throughout the & 7 Priority
entire first VCDUs
80bps period
and the entire **FSR tapes
120bps period. requested**
- The snr's
throughout the
stated time
period were
2-3 db from
predicted.
- The PEC was
~ .08 degrees
- The s/c was
in the Io
plasma torus
occultation
during that
time period.
322-11:22 43 19 0 - PEC angle < - Lost TFs JN 2961
.10 degrees [51682, 51684
-> 13:40 -> 51689,
- Io torus 51698 ->
51704,
5151710 ->
51713] 72 PB
& 3 Priority
VCDUs
322-14:03 63 2 0 - PEC angle < - Lost TFs JN 2961
.10 degrees [51716 &
-> 14:16 51717] 7 PB &
- Io torus 1 Priority
VCDUs
Time (GMT) DSS Reference RT Rcvd Events Comments Cause Pass
TFs #
Lost from
PPT
322-16:12 63 1 1 - Unknown - Lost TF U 2961
[51735] 4 PB
VCDUs
**Recovered
from .btd PPT
processing**
322-01:20 43 DR# 5 0 - CMC red - Lost TFs H 2962
A02008 therefore the [51818 ->
-> 02:06 station was 51822] 10 PB
unable to & 9 Priority
distribute VCDUs
prdx to the
pointing
assembly.
The station
was on point
by 02:01z.
322-07:54 43 5 0 - PEC angle < - Lost TFs JN 2962
.10 degrees [51923 ->
-> 08:12 51926, &
51928] 19 PB
& 1 Priority
VCDUs
324-17:14 63 DR# 1 0 - PEC angle ~ - Lost TF JN 2963
L01614 .065 degrees [52396] 4 PB
VCDUs
325-12:44 43 1 1 - PEC angle ~ - Lost TF JN 2964
.065 degrees [52707] 4 PB
VCDUs
**Recovered
in the ,btd
PPT file**
326-10:47 43 3 3 - Large number - Lost TFs JN 2965
of R/S [53022 ->
-> 10:57 corrections 53024] 12 PB
and multiple VCDUs
passes through
the R/S to **Recovered
decode in the .btd
throughout PPT file**
this time
period.
- PEC angle ~
.065 degrees
326-22:17 14 DR# 77 0 - The uplink - Lost TFs PD 2966
G03012 was LCP vice [53133 ->
-> RCP. This 53206] 288 PB
327-03:21 decreased the & 10 Priority
downlink agc VCDUs
by about
-20db.
- Two mode
changes, 1-way
& 2-way, when
the txr first
turned off and
then for the
resweep in
RCP.
326-13:16 43 1 0 - Unknown - Lost TFs U 2966
[53389] 4 PB
VCDUs
327-13:20 63 19 19 - The GTC was - Lost TFs S 2966
rebooted as no [53390, 53392
-> 16:30 tlm was being -> 53395,
output to JPL. 53397 ->
53400, 53403
-> 53405,
53408 ->
53410, 53412
-> 53415] 72
PB & 4
Priority
VCDUs
**Recovered
from the .btd
PPT file**
328-01:26 43 DR# 2 2 - Unknown - Lost TFs U 2967
A02020 53506 &
-> 01:31 - Large R/S 53507] 8 PB
corrections VCDUs
- PEC angle ~ **Recovered
.105 degrees from the .btd
PPT file**
328-13:17 63 DR# 2 0 - Heavy rains - Lost TFs W 2967
L01620 accompanied by [53738 &
-> 13:35 high SNT 53739] 7 PB &
1 Priority
VCDUs
329-12:58 63 DR# 13 0 - The station - Lost TFs A 2968
L01626 was on the Mod [54089 ->
-> 14:40 3 maser from 54101] 49 PB
BOT (1255z) & 3 Priority
until ~14:20z. VCDUs
330-05:57 43 2 0 - Heavy rains - Lost TFs W 2968
accompanied by [54309 &
-> 06:04 high SNT 54310] 8 PB
VCDUs
330-12:57 43 1 0 - Rate change - Lost TF S 2969
40-20bps [54426] 4 PB
VCDUs
330-16:38 63 DR# 2 2 - Comm lines - Lost TFs GCF 2969
N44674 down between [54456 &
-> 16:58 JPL and SPC60 54457] 8 PB
from 16:56z - VCDUs
17:10z.
**Recovered
from the .btd
PPT file**
330-20:05 14 3 3 - Unknown - Lost TFs U 2970
[54483, 54485
-> 22:31 & 54486] 2
Priority
VCDUs
**Recovered
from the .btd
PPT file**
Time (GMT) DSS Reference RT Rcvd Events Comments Cause Pass
TFs #
Lost from
PPT
331-05:22 43 1 0 - Rain and - Lost TF W 2970
high [54581] 4 PB
subsequent SNT VCDUs
331-11:14 43 DR# 23 0 - The Complex - Lost TFs F 2970
A02027 master timing 54685 ->
-> 13:10 reference 54707] 89 PB
failed. No & 3 Priority
restoral prior VCDUs
to scheduled
EOT.
333-09:47 43 4 0 -Rain and - Lost TFs W 2972
subsequent [55367 ->
-> 10:01 high SNT 55370] 16 PB
VCDUs
335-17:50 63 DR# 1 0 - The station - Lost TF A 2974
L01637 utilized the [56141] 4 PB
Mod3 maser in VCDUs
place of the
prime. Less
gain less
data.
336-00:54 43 DR# 6 0 - The FSC core - Lost TFs S 2975
A02045 task failed to [56218 ->
-> 01:09 initialize 56223] 24 PB
properly. The VCDUs
entire DGT was
rebooted to
restore.
336-15:36 63 DR# 2 0 -Rate change - Lost TFs S 2975
L01639 40-60bps [56494 &
16:40 56506] 8 PB A
- The station VCDUs
utilized the
Mod3 maser in
place of the
prime. Less
gain less
data.
337-00:45 14 FR# 09203 46 46 - The TIS, - Lost TFs I 2976
43 and, or GIF [56601 ->
-> 02:30 halted and 56646] 141 PB
required a & 4 Priority
reboot to VCDUs
restore
operability. **Recovered
from the .fcd
PPT file**
338-12:25 63 FR# 8910 4 4 - The BCS task - Lost TFs I 2977
halted and [57211 ->
-> 13:12 needed to be 57217] 15 PB
restarted to & 1 Priority
restore VCDUs
dataflow.
**Recovered
from .fcd PPT
file**
338-19:57 14 DR# 2 0 - The antenna - Lost TFs A 2978
G03061 was off-point [57275 &
-> 20:16 due to 57276] 8 PB
unspecified VCDUs
reasons.
Probably
related to DR#
G03060.
338-21:54 14 DR# 2 0 - Late 2-way - Lost TFs A 2978
G03060 mode change as [57291 &
-> 22:08 the station 57292] 6 PB &
was unable to 1 Priority
complete txr VCDUs
calibration
without the
pre-cal time.
339-05:24 43 DR# 1 0 - The FSC was - Lost TF S 2978
A02059 unable to [57436] 4 PB
correlate this VCDUs
frame for an
unknown
reason.
339-10:33 43 DR# 18 1 - These TFs - Lost TFs LM 2978
A02061 may have been [57572 ->
-> 10:45 lost due to 57576, 57578
low link -> 57584,
10:47 margin and 57603 ->
associated 57608] 73 PB
-> 11:03 high datarate & 1 Priority
of 120bps. The VCDUs
12:04 SNR's averaged
-6.6db **Recovered
-> 12:26 throughout TF [57576] 4
this period. PB VCDUs from
.btd PPT
- Also the R/S file**
decoder was
laboring
through 3-4
passes during
this time to
produce a
valid TF.
340-04:09 43 DR# 3 0 - DSS14 had a - Lost TFs A 2979
G03068 bad module [57854 ->
-> 04:16 within the 57856] 12 PB
downconverter VCDUs
which caused
loss of usable
array ininput.
340-12:25 63 DR# 6 0 - The - Lost TFs A 2979
L01653 subreflector [57999 ->
-> 13:20 was 58004, 58017]
incorrectly 23 PB & 1
14:42 positioned. Priority
VCDUs
- The u/l had
to be reswept
due to
incorrect
subreflector
positioning
340-19:30 14 2 0 - Unknown - Lost TFs U 2980
[58060 &
-> 19:49 58061] 8 PB
VCDUs
Time (GMT) DSS Reference RT Rcvd Events Comments Cause Pass
TFs #
Lost from
PPT
342-00:48 43 1 0 - Unknown - Lost TF U 2981
[58511] 4 PB
VCDUs
344-03:32 43 2 0 - The station - Lost TFs U 2983
was acquiring [59329 &
-> 03:37 the downlink 59330] 3 PB &
after 2 Priority
completing the VCDUs
Delta DOR
activity.
344-09:26 43 FR #90471 26 - The BCS - Lost TFs I 2983
function [59441 ->
-> 10:58 halted and it 59466] 100
was restarted PB, 2 RTS & 2
to restore Priority
operability. VCDUs
346-12:11 63 1 - Unknown - Lost TF U 2985
[60252] 2 PB
&1 Priority
VCDUs
348-06:09 43 DR# 3 - Heavy rain - Lost TFs W 2987
A02088 and subsequent [60717, 60722
-> 06:32 high SNT & 60723] 12
PB VCDUs
TOTAL 1087 333
Total Science 12233.25
Frames:
Total Frames 14716
(including
Fill):
PP - Procedural (Project) Transfer Frames #s lost in brackets [.........]
PD - Procedural (DSN)
H - H/W Related/Failure
A - Antenna Problem
S - DGT S/W Related; Error or understood idiosyncracy/workaround/constraint
UPA - Unscheduled project action
SPA - Scheduled Project activity
GCF- GCF hardware/software anomaly
F - Facility problem (e.g. power failure)
U - Unknown
W - Weather (e.g. Parkes stow due to high winds)
I - Internal JPL AMMOS anomaly
JN - Jupiter Hot Body Noise
LM - Link Margin