Albrecht, Sebastian

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 01.11.2010, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 1 MSM 16/2 processing log Sediment echosounder data (Atlas Parasound) a) Surveys The objective of all Parasound surveys during this cruise was the detection and mapping of gas flares in the Håkon Mosby Mud Volcano area. Therefore 20 fixed parallel survey profiles were arranged in the area with a line spacing of ~70 m in east-west direction. All profile names in the further data and data processing correspond with these profiles, also shown in the following map figure 1.   Figure 1: Planned survey profiles for gas flare survey   The following Atlas Parasound surveys have been performed during this cruise. All surveys were run with a vessel speed of ~1 knot.  Survey Begin End Profile MSM16-2_816-1 27.09.2010 02:40 27.09.2010 03:08 Profile01  27.09.2010 03:18 27.09.2010 03:48 Profile02  27.09.2010 03:53 27.09.2010 04:21 Profile03  27.09.2010 04:33 27.09.2010 05:02 Profile04  27.09.2010 05:09 27.09.2010 05:41 Profile05  27.09.2010 05:46 27.09.2010 06:22 Profile06  27.09.2010 06:26 27.09.2010 07:00 Profile07  01.11.2010, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 2 MSM16-2_816-2 28.09.2010 02:30 28.09.2010 03:00 Profile08  28.09.2010 03:09 28.09.2010 03:48 Profile09  28.09.2010 03:59 28.09.2010 04:31 Profile10  28.09.2010 04:36 28.09.2010 05:08 Profile11  28.09.2010 05:19 28.09.2010 05:49 Profile12  28.09.2010 05:57 28.09.2010 06:30 Profile13  28.09.2010 06:43 28.09.2010 07:13 Profile14 MSM16-2_816-3 29.09.2010 00:10 29.09.2010 00:59 Profile14  29.09.2010 01:05 29.09.2010 01:53 Profile15  29.09.2010 01:57 29.09.2010 03:06 Profile16  29.09.2010 03:17 29.09.2010 03:47 Profile17  29.09.2010 03:58 29.09.2010 04:38 Profile18  29.09.2010 04:53 29.09.2010 05:25 Profile19 MSM16-2_816-4 29.09.2010 23:00 29.09.2010 23:52 Profile20 MSM16-2_834-1 30.09.2010 01:13 30.09.2010 01:56 Profile01  30.09.2010 02:14 30.09.2010 02:59 Profile02  30.09.2010 03:15 30.09.2010 04:02 Profile03  30.09.2010 04:15 30.09.2010 05:17 Profile04  30.09.2010 05:32 30.09.2010 05:55 Profile05a  01.10.2010 05:48 01.10.2010 06:32 Profile05b  01.10.2010 06:37 01.10.2010 07:21 Profile06  01.10.2010 07:31 01.10.2010 08:14 Profile07a  02.10.2010 05:08 02.10.2010 05:38 Profile07b  02.10.2010 05:42 02.10.2010 05:55 Profile08a  03.10.2010 09:29 03.10.2010 10:17 Profile08b  03.10.2010 10:24 03.10.2010 11:09 Profile09  04.10.2010 19:15 04.10.2010 19:57 Profile10 MSM16-2_859-1 04.10.2010 20:18 04.10.2010 21:04 Profile05a  04.10.2010 21:09 04.10.2010 21:51 Profile06a  04.10.2010 22:00 04.10.2010 22:41 Profile07a  04.10.2010 22:54 04.10.2010 23:36 Profile08a  04.10.2010 23:46 05.10.2010 00:31 Profile09a  05.10.2010 00:39 05.10.2010 01:22 Profile10a  05.10.2010 01:49 05.10.2010 02:32 Profile05b  05.10.2010 02:43 05.10.2010 03:31 Profile06b  05.10.2010 03:35 05.10.2010 04:27 Profile07b  05.10.2010 04:32 05.10.2010 05:18 Profile08b  05.10.2010 05:24 05.10.2010 06:08 Profile09b  05.10.2010 06:14 05.10.2010 06:57 Profile10b MSM16-2_865-1 05.10.2010 20:42 05.10.2010 22:01 Profile04  05.10.2010 22:08 05.10.2010 22:56 Profile05  05.10.2010 23:05 05.10.2010 23:48 Profile06  05.10.2010 23:58 06.10.2010 00:44 Profile07  06.10.2010 00:51 06.10.2010 01:38 Profile08  06.10.2010 01:48 06.10.2010 02:29 Profile09  06.10.2010 02:34 06.10.2010 04:05 Profile10  06.10.2010 04:10 06.10.2010 04:53 Profile11  b) Original data The following Atlas Parasound data types were recorded: - PHF (primary high frequency, ~20 KHz) in ASD/PS3/SGY formats at a window range from seafloor to approx. 1000 m above (for gas flare observation) - SLF (secondary low frequency, ~4 KHz) for the sediment layer in ASD/PS3/SGY formats   01.11.2010, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 3 c) Processing The file headers of Atlas Parasound ASD- and PS3-files contain the original navigation recorded at expedition time. No further navigation processing was made. The ASD, PS3 and SGY files are published as TAR archives each containing the data for one survey profile.  d) Data visualization with SeNT SeNT (Se suite for Windows NT, from Universität Bremen, Hanno Keil) was used to create plots of the Parasound PS3 data. The data of each survey and each frequency (PHF, SLF) was plotted by distance (100 m per cm) and saved as PNG image file. See example plots below.   Figure 2: Sample plot of profile 10, high frequency 20 kHz  Figure 3: Sample plot of profile 10, low frequency 4 kHz 

MSM 16/2 processing log, sediment echosounder data (Atlas Parasound)

   11.08.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 1 PS43/3 processing log  a) Original data  Original Parasound data were held on hard disk drive. A file structure of several “ANTXX” directories was given which contained PS3 files indicating a raw copy of original Parasound tapes.  b) Processing  • Sorting:  Resulting PS3 files were archived 4-hour-wise in TAR archives. • Meta navigation table for PANGAEA:  A navigation table was created using a 10 minute interval navigation extracted from the DShip 10-minute-database (dship.awi.de). Afterwards all TAR archives were referenced to the navigation table accordingly. Navigation rows without references to TAR archives were removed.  Some PS3 files contain wrong date/time headers and wrong latitude/longitude values. Their correction was not covered by this processing.  c) Statistics  Data volume:     15.9 GB  Total number of files checked:    12857 Total number of headers checked:   1358699 Total number of files with invalid date/time:  20 (0.16 %) Total number of invalid date/time headers:  673 (0.05 %) Total number of files with wrong lat/longs:  43 (0.33 %) Total number of wrong lat/long headers:  223 (0.02 %)      11.08.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 2 d) Navigation overview  Figure 1: Navigation data as derived from meta navigation table.                                       

ANT-XIV/3 processing log, sediment echosounder data (Atlas Parasound)

   28.06.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 1 ARK-XVIII/2 processing log  a) Original data  Original Parasound data were held on hard disk drive. A file structure of several “CDXX” directories was given which contained pre-sorted folders for track/seismic profile, corrupt and zero data PS3 files.   b) Processing  • Sorting:  The pre-sorted PS3 data directories with given track or seismic profile names were used as the basis for creating TAR archives.  • Meta navigation table for PANGAEA:  A navigation table was created using a 10 minute interval navigation extracted from the DShip 10-minute-database (dship.awi.de). All TAR archives were referenced to the navigation table accordingly.  Some PS3 files contain wrong date/time headers and wrong latitude/longitude values. Their correction was not covered by this processing.  c) Statistics  Data volume:    14 GB  Total number of files checked:  5897 Total number of headers checked:  1055926 Total number of files with invalid date/time: 71 ( 1.20 percent ) Total number of invalid date/time headers: 179 ( 0.02 percent ) Total number of files with wrong lat/long: 2133 ( 36.17 percent ) Total number of wrong lat/long headers: 18894 ( 1.79 percent )  d) Profiles  PS3 files are sorted based on the following profile/track table given in the original data:  Start  End  Profile name Date Time Date Time  30.08.2002 05:53 30.08.2002 09:08 Track 001  30.08.2002 09:18 30.08.2002 22:44 Seismic profile 20020300a  30.08.2002 22:52 31.08.2002 11:20 Seismic profile 20020300b  31.08.2002 11:29 31.08.2002 20:33 Seismic profile 20020300c  31.08.2002 20:43 01.09.2002 05:46 Seismic profile 20020310 01.09.2002 05:55 01.09.2002 15:03 Seismic profile 20020320 01.09.2002 15:13 01.09.2002 15:50 Track 002   02.09.2002 13:25 03.09.2002 05:55 Track 003   03.09.2002 12:30 03.09.2002 13:37 Track 004   03.09.2002 13:42 03.09.2002 21:10 Seismic profile 20020330 03.09.2002 21:31 04.09.2002 14:51 Seismic profile 20020340 04.09.2002 14:56 04.09.2002 17:15 Seismic profile 20020345 04.09.2002 17:20 05.09.2002 12:28 Seismic profile 20020350 05.09.2002 12:34 05.09.2002 15:47 Track 005  05.09.2002 19:56 05.09.2002 22:43 Track 006   05.09.2002 22:48 06.09.2002 07:24 Seismic profile 20020355 06.09.2002 07:39 06.09.2002 10:15 Seismic profile 20020360 06.09.2002 10:19 06.09.2002 20:04 Seismic profile 20020365 06.09.2002 20:09 06.09.2002 21:35 Seismic profile 20020370 06.09.2002 21:40 07.09.2002 05:22 Seismic profile 20020375 07.09.2002 05:26 07.09.2002 07:31 Seismic profile 20020380 07.09.2002 07:36 07.09.2002 13:45 Seismic profile 20020385 07.09.2002 13:50 07.09.2002 19:46 Seismic profile 20020386 07.09.2002 19:51 08.09.2002 02:21 Seismic profile 20020387    28.06.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 2 08.09.2002 02:31 08.09.2002 08:46 Seismic profile 20020388 08.09.2002 08:53 08.09.2002 18:18 Seismic profile 20020390 08.09.2002 18:28 09.09.2002 03:50 Track 007  10.09.2002 18:48 10.09.2002 19:20 Track 008 10.09.2002 19:25 11.09.2002 04:26 Seismic profile 20020400 11.09.2002 04:31 11.09.2002 07:32 Seismic profile 20020405 11.09.2002 07:37 11.09.2002 09:53 Seismic profile 20020410 11.09.2002 09:58 11.09.2002 17:27 Seismic profile 20020415 11.09.2002 17:32 11.09.2002 19:48 Seismic profile 20020420 11.09.2002 19:53 12.09.2002 00:15 Seismic profile 20020425 12.09.2002 00:20 12.09.2002 02:17 Seismic profile 20020430 12.09.2002 02:23 12.09.2002 09:36 Seismic profile 20020435 12.09.2002 09:41 12.09.2002 22:48 Track 009 12.09.2002 22:53 13.09.2002 06:02 Seismic profile 20020440 13.09.2002 06:07 13.09.2002 11:28 Track 010 13.09.2002 11:33 13.09.2002 18:03 Seismic profile 20020445 13.09.2002 18:08 13.09.2002 21:39 Track 011 13.09.2002 23:59 14.09.2002 06:31 Track 012 14.09.2002 06:36 15.09.2002 07:26 Seismic profile 20020500 15.09.2002 07:36 15.09.2002 11:47 Seismic profile 20020501 15.09.2002 11:52 15.09.2002 20:20 Seismic profile 20020505 15.09.2002 20:25 15.09.2002 23:53 Seismic profile 20020510 15.09.2002 23:58 16.09.2002 12:28 Seismic profile 20020515 16.09.2002 12:43 16.09.2002 16:19 Seismic profile 20020520 16.09.2002 16:24 17.09.2002 05:57 Seismic profile 20020525 17.09.2002 06:02 17.09.2002 14:00 Seismic profile 20020530 17.09.2002 14:05 17.09.2002 20:28 Track 013 17.09.2002 20:33 18.09.2002 11:23 Seismic profile 20020540 18.09.2002 11:28 18.09.2002 14:50 Seismic profile 20020545 18.09.2002 14:55 18.09.2002 21:38 Seismic profile 20020550 18.09.2002 21:43 19.09.2002 01:26 Seismic profile 20020560 19.09.2002 01:31 19.09.2002 15:31 Seismic profile 20020565 19.09.2002 15:36 19.09.2002 19:27 Seismic profile 20020570 19.09.2002 19:32 20.09.2002 10:20 Seismic profile 20020575 20.09.2002 10:30 20.09.2002 12:20 Seismic profile 20020580 20.09.2002 12:30 21.09.2002 01:20 Seismic profile 20020585 21.09.2002 01:30 21.09.2002 06:34 Seismic profile 20020590 21.09.2002 06:44 21.09.2002 16:26 Seismic profile 20020595 23.09.2002 06:10 24.09.2002 02:50 Seismic profile 20020600 24.09.2002 03:00 24.09.2002 05:29 Seismic profile 20020605 24.09.2002 05:38 25.09.2002 04:50 Seismic profile 20020610 25.09.2002 05:00 25.09.2002 08:20 Seismic profile 20020615 25.09.2002 08:30 26.09.2002 04:16 Seismic profile 20020620 26.09.2002 04:25 26.09.2002 08:25 Seismic profile 20020625 26.09.2002 08:34 27.09.2002 01:28 Seismic profile 20020630 27.09.2002 01:38 27.09.2002 05:30 Seismic profile 20020640 27.09.2002 05:39 27.09.2002 21:52 Seismic profile 20020645 27.09.2002 22:00 28.09.2002 01:35 Seismic profile 20020650 28.09.2002 01:47 28.09.2002 16:28 Seismic profile 20020655 28.09.2002 16:37 28.09.2002 19:52 Seismic profile 20020660 28.09.2002 20:12 29.09.2002 11:11 Seismic profile 20020665 29.09.2002 11:21 29.09.2002 14:25 Seismic profile 20020670 29.09.2002 14:33 30.09.2002 06:05 Seismic profile 20020675 30.09.2002 06:15 30.09.2002 15:49 Track 014 03.10.2002 12:28 04.10.2002 15:03 Seismic profile 20020700a 04.10.2002 15:13 05.10.2002 07:29 Seismic profile 20020700b     28.06.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 3 e) Navigation overview  Figure 1: Navigational data as derived from navigation of meta table.                                       

ARK-XVIII/2 processing log, sediment echosounder data (Atlas Parasound)

   11.08.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 1 PS28/2 processing log  a) Original data  Original Parasound data were held on hard disk drive. A file structure of several “TXX” directories was given which contained PS3 files indicating a raw copy of Parasound tapes.  b) Processing  • Sorting:  Resulting PS3 files were archived 4-hour-wise in TAR archives. • Meta navigation table for PANGAEA:  A navigation table was created using a 10 minute interval navigation extracted from the DShip 10-minute-database (dship.awi.de). Due to missing navigation data from DShip in the time 28.12.1993 00:10 until 01.01.1994 00:00 navigation data from PS3 headers was used instead. Afterwards all TAR archives were referenced to the navigation table accordingly. Navigation rows without references to TAR archives were removed.  Some PS3 files contain wrong date/time headers and wrong latitude/longitude values. Their correction was not covered by this processing.  c) Statistics  Data volume:     2.12 GB  Total number of files checked:    2265 Total number of headers checked:   138311 Total number of files with invalid date/time:  2 (0.09 %) Total number of invalid date/time headers:  2 (0.00 %) Total number of files with wrong lat/longs:  43 (1.90 %) Total number of wrong lat/long headers:  79 (0.06 %)      11.08.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 2 d) Navigation overview  Figure 1: Navigation data as derived from meta navigation table.                                       

ANT-XI/2 processing log, sediment echosounder data (Atlas Parasound)

   28.06.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 1 ARK-XVI/2 processing log  a) Original data  Original Parasound data were held on hard disk drive. A file structure of several “TapeXX” directories was given which contained PS3 files.   b) Processing  • Renaming:  PS3 files from tape directories were moved to one folder. Thereby wrong PS3 file names which were given by the data acquisition software during date changes were corrected manually. • Corrupted files:  PS3 files from 08041052.ps3 to 08041422.ps3 (74 in total, 97 MB) are corrupt and therefore removed. • Year 2000 and leap year problem:  Year values in all headers from each PS3 files have been changed from 1900 to 00. Otherwise programs like SeNT would not be able to read the PS3 file. Due to a leap year problem of Parasound’s data acquisition software all PS3 files from year 2000 which were recorded after February, 28th have a wrong date (1 day further than true). All PS3 files and all contained headers were corrected. • Sorting:  Resulting PS3 files were archived 4-hour-wise in TAR archives. • Meta navigation table for PANGAEA:  A navigation table was created using a 10 minute interval navigation extracted from the DShip 10-minute-database (dship.awi.de). Due to missing navigation data from DShip in the time 19.08.2011 11:10-15:10 navigation data from PS3 headers was used instead.  Afterwards all TAR archives were referenced to the navigation table accordingly. Navigation rows without references to TAR archives were removed.  Some PS3 files contain wrong date/time headers and wrong latitude/longitude values. Their correction was not covered by this processing.  c) Statistics  Data volume:    2.8 GB  Total number of files checked:  2384 Total number of headers checked:  132821 Total number of files with invalid date/time: 18 ( 0.76 percent ) Total number of invalid date/time headers: 149  ( 0.11 percent ) Total number of files with wrong lat/longs: 8 ( 0.34 percent ) Total number of wrong lat/long headers: 160 ( 0.12 percent )     28.06.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 2  Figure 1: Navigational data as derived from navigation of meta table.                                       

ARK-XVI/2 processing log, sediment echosounder data (Atlas Parasound)

   11.08.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 1 PS47/2 processing log  a) Original data  Original Parasound data were held on hard disk drive. A file structure of several “TXX” directories was given which contained PS3 files indicating a raw copy of Parasound tapes.  b) Processing  • Sorting:  Resulting PS3 files were archived 4-hour-wise in TAR archives. • Meta navigation table for PANGAEA:  A navigation table was created using a 10 minute interval navigation extracted from the DShip 10-minute-database (dship.awi.de). Afterwards all TAR archives were referenced to the navigation table accordingly. Navigation rows without references to TAR archives were removed.  Some PS3 files contain wrong date/time headers and wrong latitude/longitude values. Their correction was not covered by this processing.  c) Statistics  Data volume:     28.0 GB  Total number of files checked:    21457 Total number of headers checked:   1397929 Total number of files with invalid date/time:  7 (0.54 %) Total number of invalid date/time headers:  193 (0.01 %) Total number of files with wrong lat/longs:  45 (0.21 %) Total number of wrong lat/long headers:  357 (0.02 %)      11.08.2011, Sebastian Albrecht, FIELAX Gesellschaft für wissenschaftliche Datenverarbeitung mbH 2 d) Navigation overview  Figure 1: Navigation data as derived from meta navigation table.                                       

ANT-XV/2 processing log, sediment echosounder data (Atlas Parasound)

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