Ocean Acoustic Observatory Data Acess
Although data is no longer flowing, the Naval Postgraduate School maintains a
data archive of the acoustic data collected from 1997-2000. Access
requests must be submitted to NPS, outlining project information and amount of
data requested (dates, times, durations, ...). Requests will then be
forwarded to the US Navy office, which still maintains access approval for the
data coming from the Navy array. Access approval is necessary for both the
multi-phone (classified) data, as well as the single phone (unclassified) data
sets.
 Unclassified Data Archive (1997-2000)
| 1997 Data Availability |
| YearDay |
Time (UTC) |
Note |
| 346 |
19:51 -348 09:54 |
Continuous collection, Dec. 11-13 |
| 348-350 |
09:54-23:51 |
Data gap due to power outage |
| 350 |
23:51 -365 24:00 |
Continuous collection, Dec. 15-31 |
NOTES:
• Data sampling rate = 1000 Hz 1997
• Timing is based on System time setup, and GPS triggering only, some drift may be evident if absolute timing is needed further investigation is necessary.
| 1998 Data Availability |
| Data Outage (day/time) |
Length |
Reason for Outage |
| 1998 YearDay 8-120 |
008 00:15- 120 22:40 |
2710.416 hrs |
El Nino floods - lost all utililties |
| 1998 YearDay 195-204 |
195 10:36 - 204 23:50 |
229.23 hrs |
missing archive data tape |
| 1998 YearDay 225-226 |
225 13:45 - 226 17:25 |
27.6 hrs |
loss of building power, no auto-restart |
| 1998 YearDay 226-231 |
226 17:25 - 231 16:45 |
119.3 hrs |
loss of building power, no auto-restart |
| 1998 YearDay 263 |
00:00 - 00:26 |
0.433 hrs |
System maintenance |
| 1998 YearDay 281-282 |
281 22:11 - 282 00:10 |
1.98 hrs |
System maintenance |
| 1998 YearDay 284-286 |
284 13:22 - 286 06:17 |
40.92 hrs |
|
| 1998 YearDay 306-307 |
306 04:24 - 307 07:19 |
26.9 hrs |
disk storage 100% full |
| 1998 YearDay 318-321 |
318 00:07 - 321 01:01 |
? hrs |
disk storage 100% full |
| 1998 YearDay 336 |
19:03 - 23:26 |
3.023 hrs |
Distribution amplifier installation |
| 1998 YearDay 364-365 |
4:10 - 19:29 |
39.3 hrs |
data link broken, unable to remote backup files |
NOTES: 1998 Data documentation and review is currently underway, known
outages are shown above
• 1998 YD 042 Power restored to Terminal Building
• 1998 YD 064-075 Telephone lines down
• 1998 YD 078 Single phone collection system reset & restarted
• 1998 YD 96-99 Telephone lines down
• 1998 YD 156 - computer register error, rebooted & restarted data collection
• 1998 YD 242 01:43 UTC - sample rate changed from 1000Hz to 2000Hz
• 1998 YD 287 Digitizer input voltage range changed from +/- 2V to +/- 5Volts
in an attempt to identify the cause of signal clipping
• 1998 YD 336 High Gain Amplifier attenuation set to -75 dB from -65 dB to
reduce signal levels at the input stages (providing full dynamic range).
• Data reviewed from 1998 YD 175
| 1999 Data Availability |
| Data Outage (day/time) |
Length |
Reason for Outage |
| 1999 YearDay 12 |
20:01-20:45 |
44 minutes |
digitizer waiting for trigger signal |
| 1999 YearDay 29-36 |
17:08 - 23:34 |
9026 minutes |
Archive tape failure |
| 1999 YearDay 39 |
10:47 - 22:37 |
710 minutes |
Power Outage (rain) |
| 1999 YearDay 40-42 |
12:42 - 19:30 |
3,288 minutes |
Power Outage (rain) |
| 1999 YearDay 53 |
20:44 - 22:16 |
92 minutes |
Data disk 100% full |
| 1999 Year Day 56-104 |
15:07-20:28 |
69,814 min. |
Hydrophone failure, rewired to alternate |
| 1999 Year Day 116 |
19:15 - 22:22 |
187 min. |
System Maintenance |
| 1999 Year Day 117 |
06:53-20:20 |
807 min. |
|
| 1999 YearDay 137 |
14:00-18:37 |
277 min. |
System maintenance |
| 1999 YearDay 153-154 |
11:38-20:07 |
1949 min. |
Power outage |
| 1999 YearDay 155 |
17:50-18:10 |
20 min. |
System Maintenance |
| 1999 YearDay 164 22:12-165 00:02 |
110 min. |
System maintenance |
| 1999 YearDay 166 |
19:36-20:41 |
65 min. |
System maintenance |
| 1999 YearDay 190 |
08:19-19:32 |
673 min. |
|
| 1999 YearDay 196 |
08:47-17:40 |
533 min. |
System lockup - Filter initialization failure |
| 1999 YearDay 197-198 |
17:40-00:02 |
322 min. |
Defective Filter unit - replaced |
| 1999 YearDay 242 11:10-243 19:21 |
1931 min. |
Power Outage - Big Sur fire |
| 1999 YearDay 251 ~22:53-297 ~23:30 |
66,273 min. |
Power Transformer damaged - Electrical Storm/Fires 1999 YD 251 |
| 1999 YearDay 338 08:17-344 23:46 |
9,569 min. |
Power Outage - blown breaker in building |
NOTES:
• TOTAL OUTAGES: 2,760.4 hours -
68.5% data availability for 1999
• Data analysis and review currently underway, above times note major events only
• 1999 Sample rate = 2000 Hz
• 1999 YD 12 ~2200 GMT - Telephone cable cut during construction, accurate timing lost
• 1999 YD 55-104 - Severe 60 Hz contamination to single phone data as hydrophone failed.
• 1999 YD 104 - Single phone data rewired to working hydrophone
• 1999 YD 147 - Local Network Time Server (NTP) clock installed, accurate timing resumed
• 1999 YD 198 - Anti-Alias filter replaced
• 1999 YD 251 - Power transformer damaged during electrical storm
• 1999 YD 297 - New transformers installed - power restored to building
• 1999 YD 347 - All telephone lines switched over to new burried telephone cable
| 2000 Data Availability |
| Data Outage (day/time) |
Length |
Reason for Outage |
| 2000 YearDay 10-11 |
18:56-20:56 |
26 hours |
data disk 100% full |
| 2000 YearDay 17-18 |
19:12-06:18 |
11.1 hours |
tar error in tape archive file |
| 2000 YearDay 22-23 |
11:28-08:37 |
21.15 hours |
Data disk 100% full |
| 2000 YearDay 33 |
04:55-23:32 |
18.6166 hours |
?? |
| 2000 YearDay 37 |
14:09-18:45 |
4.6 hours |
data disk 100% full |
| 2000 YearDay 51-53 |
21:07-22:21 |
49.233 hours |
power outage - winter storm |
| 2000 YearDay 75-76 |
05:23-23:59 |
42.6 hours |
data disk 100% full |
| 2000 YearDay 89 |
14:52-19:30 |
4.633 hours |
data disk 100% full |
| 2000 YearDay 100-102 |
16:55-17:20 |
48.42 hours |
data disk 100% full |
| 2000 YearDay 108-111 |
04:47-19:40 |
86.88 hours |
Power Outage (storm) |
| 2000 YearDay 256-366 |
|
|
System Failure |
XX.X% data availability |
NOTES:
• Data analysis and review currently underway, above times note major events only
• 2000 YD 001 Sample rate = 2000 Hz
• 2000 YD 035 Sample rate = 5000 Hz (starting at 18:29 UTC)
• Evident 60 Hz contamination starting ~YD 60
• Continued Array failure at seaward fault
• 2000 YD 216 Sample rate = 2000 Hz, ingain=100, 5V range for archive
• 2000 YD 256 Complete system failure of Unclassified archive computer.
• All remaining single phone data to be extracted from Classified Archive
This is an Information Service of the
Ocean Acoustic Observatory,
Naval Postgraduate School,
833 Dyer Road, Room 328, Monterey, CA 93943.
POC: OAO Webmaster
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