Multibeam (SeaBeam2000) Bathymetric Data Submitted to NGDC in September 2002 ============================================================================ Documented by Stuart M. Smith (SIO Geological Data Center, retired) Date: 18 September 2002 This document contains the following sections: 1. Data Set Overview 2. Data Set Structure 3. List of Cruise Legs 4. Metadata Files (Cruise-leg and Data Info files) 5. Multibeam Data files 6. Data Quality (type of scientific program) 7. SeaBeam2000 System Specifications 8. SIO Swath_Bathy Data Format (MBSYSTEM format #32) 9. Processing Paths and Programs (SIO Swath_Bathy and MBSYSTEM) 10. 60-beam Ping to 120-beam Ping Conversions 11. Sound Velocity Profiles 12. SIO Geological Data Center Contact 13. Acknowledgments Table 1: R/V Melville SeaBeam cruise legs, 1992 - 1999 Table 2: Cruise-leg Metadata File Example Table 3: Data-file Info File Example 1. Data Set Overview -------------------- This data set contains multibeam bathymetry collected with a SeaBeam 2000 echosounder system during 63 cruise legs on research ship R/V Melville, operated by the Scripps Institution of Oceanography (SIO). These cruises took place between July 1992, when the SeaBeam2000 system was installed, and the end of 1999. With the exception of 8 legs in the Indian Ocean, all of these data were collected in the Pacific. The multibeam data files are in the SIO Swath_Bathy format, readable with the MBSYSTEM package of programs as MB Format 32. Most files contain data from one ship-day, starting a few minutes before GMT midnight. A "Cruise-leg" metadata file is present for each cruise leg and a "Data-file Info" file accompanies each data file with the same name. Navigation control, using the WGS-84 datum, was GPS for all cruises: the C/A code until September 1995 and the higher accuracy P-code thereafter. Sound velocity profiles, calculated from daily XBT drops and Carter depth correction tables, were used to make beam refraction corrections but the depths are reported in uncorrected meters (assumed sound velocity of 1500meters/second). Depths have been corrected for ship draft but there are no tidal corrections applied. Acoustic intensity (sidescan) data were logged at the same time as the bathymetric data. These acoustic data are not included in this dataset. Contact the SIO Geological Data Center (see section 12) for availability. 2. Data Set Structure --------------------- Bathymetric data and other information for each leg are located in separate directories identified by the cruise identifier. The identifiers consist of a four character cruise abbreviation, two character leg number, and two character ship ID, e.g. PHNX03MV. The following files are in each directory (file names): * General Information File - this file (AA.README.SBtoNGDCnotes) [ASC] * SIO Swath_bathy Format Description (swath_bathy_doc.rtf) [RTF] * Cruise-leg metadata file (metadata.) [ASC] * Trackplot, page-size plot file (.sumplot.ps) [PS] * Multibeam data files (SB.) [BIN] * Data-file Info files (SB..inf) [ASC] Modes: [ASC] = ASCII, end-of-line delimited by newline character [RTF] = Rich Text Format [BIN] = Binary, high-endian byte order [PS] = PostScript 3. Cruise-legs with Multibeam (SeaBeam2000) Bathymetry Collected on ------------------------------------------------------------------- R/V Melville, 1992 - 1999, Submitted to NGDC in August 2002 ----------------------------------------------------------- Listed in cronological order. Numbers in parentheses are "data quality estimates" (see Section 6). See Table 1 for dates and geographical boundaries. PHNX02MV (3) PHNX03MV (5) PHNX04MV (1) GLOR00MV (1) GLOR02MV (3) GLOR03MV (5) GLOR04MV (5) GLOR05MV (3) GLOR06MV (3) GLOR07MV (5) GLOR08MV (3) REM-01MV (2) REM-02MV (2) WEST00MV (1) WEST01MV (5) WEST03MV (3) WEST04MV (2) WEST05MV (2) WEST06MV (3) WEST08MV (3) WEST09MV (5) WEST10MV (5) WEST11MV (2) WEST12MV (2) WEST13MV (2) WEST15MV (3) BMRG01MV (4) BMRG02MV (4) BMRG03MV (3) BMRG04MV (2) BMRG05MV (4) BMRG06MV (5) BMRG07MV (2) BMRG08MV (5) BMRG09MV (4) SOJN01MV (5) SOJN02MV (3) SOJN04MV (2) SOJN05MV (4) SOJN06MV (2) SOJN07MV (5) SOJN08MV (2) SOJN09MV (2) NV9704MV (1) RSCN01MV (5) PANR01MV (5) PANR04MV (3) PANR05MV (4) NPAL98MV (3) PACS03MV (2) AVON01MV (4) AVON02MV (3) AVON05MV (2) AVON06MV (5) AVON07MV (3) AVON08MV (3) AVON09MV (3) AVON10MV (3) AVON11MV (3) AVON12MV (2) LWAD99MV (2) MOCE05MV (2) CORE01MV (1) Per the policy of the SIO Geological Data Center Steering Committee, a chief scientist may place a proprietary hold on data, nominally for a two-year period after the end of a cruise leg. This period may be extended to permit a student to finish his or her thesis, because of later follow up work in the same region or for other reasons. For the current status of cruise-legs on proprietary hold, contact the SIO Geological Data Center (Section 12). Multibeam data from the following cruise legs on R/V Melville from 1992 through 1999 are on proprietary hold and are *not* included in this data set: GLOR01MV (4) GLOR09MV (4) WEST02MV (4) WEST07MV (4) WEST14MV (4) PANR02MV (4) PANR03MV (4) AVON03MV (3) AVON04MV (5) OXMZ01MV (5) Systematic errors are present in data from the following cruises and they are not being sent to NGDC at this time: PHNX00MV (1) PHNX01MV (5) PANR06MV (4) PANR07MV (3) PANR08MV (2) 4. Metadata Files ----------------- Each directory contains a Cruise-leg metadata file as well as Info Data files for each of the multibeam data files. The Cruise-leg metadata file is named "metadata." and is in a format being developed by the SIO Geological Data Center. It contains metadata records in the form of: parameter_name,parameter_value,narrative_label e.g. "bathymetric sensor",bathy_sensor,"SEABEAM 2000 w/sidescan" An example of a Cruise-leg metadata file is in Table 2 at the end of this document. A "Data-file Info" file accompanies each data file with the same name. It contains the output of the MBSYSTEM 'mbinfo' program, listing information such as beginning and end times and positions, ping statistics, programs used to modify the file, etc. This file also contains file pedigree information added by the SIO Swath_Bathy package. The Data-file Info files were created with the MBSYSTEM program 'mbinfo', version 5.0beta18 with the -C and -G options. (The -C option lists all the comments, such as programs that modified the data, in inverse chronological order. The -G option ignores "bad" navigation in determining the data file's geographical boundaries.) The info files have the same name as their data file with an added ".inf" suffix. See Table 3 for an example. 5. Multibeam Data Files ----------------------- The data files are in the SIO Swath_Bathy format, readable with the MBSYSTEM package of programs as MB Format 32. Most files contain data from one ship-day, starting a few minutes before GMT midnight. File names are in the form of SB., where varies depending on how the file was processed and , which is the date when the file ends. If there are more than one file in a day the additional files will have ".1", ".2", etc appended to the file name. If the file was editted with the 'mbinfo' program, an additional ".ed" suffix will be present. e.g. SBfixavg.94dec10 SBfixavg.94dec10.1 SBunflagfix.99may01.ed SBunflagfix.99may01.1.ed The following file prefixes will be found in the data set: SBmrg SBdespike SBfix SBavg SBfixavg SBedit SBunflagfix SBunflagfixavg SBunflagfxvg SBunflgfxavg These names reflect what processing has been done on the file as listed in the corresponding Data-file Info file for each data file. See Section 9 for a brief description of each program used in the processing. 6.Data Quality -------------- It has been SIO policy to maximize the collection of multibeam bathymetric data whenever and whereever possible with the result that multibeam data have been collected on nearly all R/V Melville cruise legs since 1992. Automatic data logging has been done in unattended mode on transit and other non-geological/ geophysical legs in addition to those on which multibeam surveying was an important component or the main scientific activity. This policy has produced a substantial amount of data, but of varying quality. The SIO Shipboard Computer Group technicians monitor the multibeam echosounding and data logging systems on board and check that the sequence of daily auto-processing tasks completes successfully. They are able to to repair some data problems, as are the onshore staff of the Geological Data Center which, during this period, did the final processing and archiving of the data. However it is the responsibility of the scientific party to maintain an underway watch, alert the onboard tech if there are problems, fine tune the settings of the echounder and other systems and ping-edit the data. Therefore a rough measure of the operational quality of data collection on a cruise leg can be made by examining what type of scientific operations were the main emphasis and the nature of the scientific party: On a quality scale of 1 (lowest) to 5 (highest): 1 = Test trip. Generally only a day or two in length, usually near San Diego, California. Data may be incomplete and have glitches due to testing and non-standard instrument settings. No data editing. Sound velocity profiles(SVP) may not be updated frequently. 2 = Transit or scientific program with no underway geophysical component. Continuous underway watch not maintained. Instruments set to generic settings and may be adjusted from time to time by techs. No data editing. SVP may not be updated daily. 3 = Geological/geophysical program with multibeam surveying as an ancillary component. U/W watch usually kept but watchstanders may not be experienced in adjusting instruments. Daily SVP updating. Data editing may, or may not, be done. 4 = Multibeam survey is primary function. Continuous U/W watch, SVP updates and instrument monitoring. Data editing often done by scientific party, especially for part of leg in science area. 5 = Multibeam survey is primary function. Instruments continually monitored by watchstanders supervised by experienced scientist. SVP updates daily. SIO tech or scientific party member with equivalent experience assigned to daily data editing and processing. Quality estimates for each cruise leg are included in the cruise list in Section 3 above. 7. SB2000 system specifications ------------------------------- Specifications for the SeaBeam2000 system received from the manufacturers, SeaBeam Inc., in January 2002: Number of beams (shallow mode) 60 Number of beams (intermed. & deep modes) 120 Individual beam width fore/aft: 2deg athwartships: 2deg (w/ 1deg overlap) Depth Range 10-11,000 meters Swath width (surface to 4600m) 120deg Swath width (4600m to 11,000m) 90deg Transmit Beams (for full swath) 1 Transmit Beamwidth (athwartship, 0.3dB) 100deg (athwartship, 0.8db) 120deg Receive beamwidth (fore & aft) 15deg Pulse length 2 to 20 msec Fequency 12 kHz Source level @ +/-30deg 234dBuPA/m Maximum Pitch +/- 7.5deg Maximum Roll +/- 10deg 8. SIO Swath_bathy Data Format (MBSYSTEM format #32) ---------------------------------------------------- The data files are in the SIO Swath_Bathy format designed by James S. Charters of the SIO Shipboard Computer Group for multibeam data collected by SIO. It can handle data from the first "Classic" 16-beam SeaBeam system that was on the R/V Thomas Washington as well as these SeaBeam2000 data from R/V Melville. The format description is contained in the file "Swath_Bathy_Format_Description.rtf" which is in Rich Text Format. This data format can be read by MBSYSTEM, a package of programs written by David Caress and Dale Chayes, Lamont-Doherty Earth Observatory (website: www.ldeo.columbia.edu/MB-System/MB-System.intro.html) as MBSYSTEM Format 32. 9. Processing Paths and Programs (Swath_Bathy and MBSYSTEM) ----------------------------------------------------------- The following SIO Swath_Bathy programs were used in processing the multibeam data. Look at the Data-file Info (.inf) file for each data file to see which programs were used on that file. Names in parentheses are prefixes of files modified by that program. Standard Processing: ------------------- sb2k_convert - convert SeaBeam vendor format log file (sb2000) to Swath_Bathy file (SBraw) swath_merge - merge SBraw file with navigation (navbin) to make SBmrg file swath_fix - despiker, removes spikes and pits (SBmrg to SBfix file) swath_boxavg - 9-beam box average (SBfix to SBfixavg file) sb2k_mbsysfix - convert 60-beam pings to 120-beam pings swath_unflag - unflags beams flagged as bad by SBI software, (creates SBunflag file) Data Repair: ----------- swath_navadj - adjust navigation: used on BMRG08MV;GLOR03MV; SOJN01MV; WEST{01,09,10}MV swath_rmhits - remove beams (or pings?): used only on GLOR01MV swath_rmping - remove pings: used only on PHNX01MV swath_unrollbias - replace roll bias: used on AVON03MV; PANR01MV; West{00,01}MV Special Purpose: --------------- swath_2_truedepth - convert uncorrected to true depth: used only on BMRG01MV swath_boxavg_u - variation of swath_boxavg: used only on GLOR02MV The following programs from the MBSYSTEM package were also used on some files: mbcopy mbedit mbnavedit mbclean Refer to the MBSYSTEM documentation for specific information about each of these programs. 10. 60-beam Ping to 120-beam Ping Conversions -------------------------------------------- The SeaBeam 2000 outputs ping data that contain 120-beam records in Intermediate and Deep modes, but only 60-beam records in Shallow mode. MBSYSTEM could not properly handle SIO SwathBathy format (MB format #32) files with 60-beam pings at the time these data were collected. Therefore these files have been reformatted to place the 60 beams into the middle of 120-beam records using program 'sb2k_mbsysfix' and is so noted in the corresponding Data-file Info file. (The 60-beam problem has reportedly been fixed in the current release of MBSYSTEM.) 11. Sound Velocity Profiles --------------------------- As standard operating procedure, a new sound velocity profile is entered at least once per day or if the sea surface temperature changes by 2 degC. Profiles are generated by combining velocity data calculated from XBT (eXpendable BathyThermograph) data from the surface to 400 or 1830 meters depth (depending on the XBT probe type) and velocities calculated from the Carter Tables (Echo-Sounding Correction Tables, 3rd ed., NP139, Hydrographic Dept., Ministry of Defence, UK) for the deeper section of the profile. Surface velocity, calculated from continuously recorded sea-surface temperature and conductivity, is added to the profile when that sensor is operating. 12. Data Contact at the Scripps Institution of Oceanography ----------------------------------------------------------- Stephen P. Miller, Head Geological Data Center Scripps Institution of Oceanography 9500 Gilman Drive La Jolla, CA 92093-0220 Phone: 858-534-1898 Fax: 858-534-0784 Email: spmiller@ucsd.edu Web: http://SIOExplorer.ucsd.edu 13. Acknowledgments ------------------- These multibeam data were collected on SIO cruises staffed by members of the SIO Shipboard Computer Group and processed by the Geological Data Center. Both groups are part of the Shipboard Technical Support Group which is in the Ship Operations and Technical Support Division. The STS Resident Technician Group also assisted with the data collection on many cruises. During the period these data were collected, members of the Shipboard Computer Group, headed by Ron Moe, included James Charters,who with Moe, wrote most of the computer code used to collect and auto-process the data, as well as John Chatwood, Earl Heckman, Jeff Skinner, Dan Jacobson and Mark Silver. Post-cruise data processing and archiving were done by Uta Peckman and Ginny Wells of the Geological Data Center, headed by Stuart Smith (Stephen P. Miller is now head of GDC). Graduate students Barry Eakins and Christina Massell assisted with collection and processing on a number of cruise legs. Special thanks go to all those members of the scientific parties who stood underway watches, night and day, on seas rough and calm. # # ###################################################################################### # TABLE 1: Cruise-legs on R/V Melville with SeaBeam (multibeam) Data, 1992 - 1999 # ###################################################################################### # # (MV*) = On proprietary hold - not included in data set. # (MVx) = Data errors - not included in data set. # #-------------------------------------------------------------------------------------------------| # Data types : tm=time; d(s,m)=depth(uncorr.sec, corr.mt); m(g,a)=mag(field,anom); # Data types : g(f,a)=grav(field,freeair); sp=seismic reflection; 35= 3.5khz depth; # Data types : sb=sea beam(multibeam) depth #-------------------------------------------------------------------------------------------------| # | | | | Cruise | | | #Cruise| |------- Cruise Lat/Lon Bounds ------| | Dates | | Data Types | # ID | | Top Bottom Left Right | | Beg End | |------ Collected -----------| #-------------------------------------------------------------------------------------------------| PHNX00MVx 32-43.0N 32-31.0N 118-09.0W 117-14.0W 19920629 19920630 tm.ds......................sb. PHNX01MVx 32-40.0N 15-51.0N 118-08.0W 98-45.0W 19920707 19920716 tm.ds....mg.ma.............sb. PHNX02MV 19-04.0N 9-23.0N 104-37.0W 99-55.0W 19920718 19920814 tm.ds....mg.ma.......35....sb. PHNX03MV 32-42.0N 18-21.0N 121-00.0W 104-18.0W 19920818 19920902 tm.ds....mg.ma.............sb. PHNX04MV 32-42.0N 32-28.0N 118-14.0W 117-15.0W 19920903 19920905 tm.ds......................sb. GLOR00MV 33-17.0N 31-37.0N 120-45.0W 117-55.0W 19920926 19920930 tm.ds....mg.ma.............sb. GLOR01MV* 32-41.0N 1-09.0N 125-22.0W 97-49.0W 19921006 19921101 tm.ds....mg.ma.......35....sb. GLOR02MV 16-50.0N 27-11.0S 116-47.0W 99-54.0W 19921105 19921210 tm.ds....mg.ma.gf.ga.35....sb. GLOR03MV 14-49.0S 27-09.0S 149-35.0W 109-27.0W 19921211 19930106 tm.ds....mg.ma.gf.ga.35....sb. GLOR04MV 13-21.0S 17-33.0S 149-35.0W 117-45.0W 19930111 19930203 tm.ds....mg.ma.gf.ga.......sb. GLOR05MV 17-28.0S 32-18.0S 149-35.0W 108-13.0W 19930208 19930321 tm.ds....mg.ma.gf.ga.35....sb. GLOR06MV 23-33.0S 33-28.0S 109-50.0W 71-38.0W 19930322 19930426 tm.ds....mg.ma.gf.ga.35....sb. GLOR07MV 24-29.0S 33-10.0S 111-14.0W 71-38.0W 19930509 19930528 tm.ds....mg.ma.gf.ga.......sb. GLOR08MV 16-50.0N 27-09.0S 117-31.0W 99-55.0W 19930531 19930701 tm.ds....mg.ma.............sb. GLOR09MV* 32-42.0N 7-41.0N 117-15.0W 96-51.0W 19930705 19930804 tm.ds....mg.ma.gf.ga.......sb. REM-01MV 48-20.0N 32-36.0N 130-46.0W 117-15.0W 19930809 19930907 tm.ds......................sb. REM-02MV 48-43.0N 32-38.0N 131-16.0W 117-15.0W 19930909 19931006 tm.ds....mg.ma.............sb. WEST00MV 32-44.0N 32-32.0N 118-05.0W 117-14.0W 19931117 19931120 tm.ds....mg.ma.gf.ga.35.sp.sb. WEST01MV 32-42.0N 18-43.0S 149-35.0W 111-45.0W 19931123 19931230 tm.ds....mg.ma.gf.ga.......sb. WEST02MV* 17-31.0S 57-53.0S 174-46.0E 123-11.0W 19940104 19940207 tm.ds....mg.ma.gf.ga.......sb. WEST03MV 20-13.0S 57-06.0S 174-47.0E 70-10.0W 19940213 19940321 tm.ds....mg.ma.............sb. WEST04MV 14-34.0S 20-13.0S 149-35.0W 70-10.0W 19940327 19940513 tm.ds......................sb. WEST05MV 17-28.0S 27-27.0S 153-04.0E 147-51.0W 19940519 19940624 tm.ds......................sb. WEST06MV 15-22.0S 27-27.0S 153-04.0E 169-59.0W 19940830 19940929 tm.ds....mg.ma.gf.ga....sp.sb. WEST07MV* 21-09.0S 54-14.0S 171-10.0E 127-14.0W 19941004 19941112 tm.ds....mg.ma.gf.ga.......sb. WEST08MV 31-56.0S 50-22.0S 114-34.0E 170-49.0E 19941116 19941205 tm.ds....mg.ma.gf.ga.......sb. WEST09MV 31-56.0S 51-05.0S 91-24.0E 119-11.0E 19941210 19950122 tm.ds....mg.ma.gf.ga.......sb. WEST10MV 31-55.0S 50-23.0S 87-56.0E 147-27.0E 19950128 19950312 tm.ds....mg.ma.gf.ga.......sb. WEST11MV 42-54.0S 54-32.0S 141-26.0E 147-29.0E 19950318 19950414 tm.ds......................sb. WEST12MV 8-00.0S 43-18.0S 147-19.0E 149-35.0W 19950418 19950505 tm.ds....mg.ma.............sb. WEST13MV 16-50.0N 17-33.0S 149-36.0W 99-54.0W 19950512 19950621 tm.ds....mg.ma.............sb. WEST14MV* 32-42.0N 9-58.0N 117-15.0W 95-43.0W 19950622 19950705 tm.ds....mg.ma.............sb. WEST15MV 44-57.0N 32-38.0N 131-22.0W 117-15.0W 19950711 19950812 tm.ds....mg.ma.............sb. BMRG01MV 32-42.0N 18-40.0S 149-45.0W 109-09.0W 19951015 19951123 tm.ds....mg.ma.gf.ga.......sb. BMRG02MV 17-33.0S 43-57.0S 176-55.0W 149-35.0W 19951128 19951210 tm.ds....mg.ma.gf.ga.......sb. BMRG03MV 43-57.0S 54-11.0S 170-30.0E 176-26.0W 19951210 19960103 tm.ds....mg.ma.............sb. BMRG04MV 42-54.0S 47-20.0S 147-20.0E 170-49.0E 19960107 19960111 tm.ds....mg.ma.............sb. BMRG05MV 31-56.0S 50-24.0S 114-19.0E 147-28.0E 19960116 19960217 tm.ds....mg.ma.gf.ga.......sb. BMRG06MV 19-57.0S 43-05.0S 77-02.0E 118-34.0E 19960222 19960414 tm.ds....mg.ma.gf.ga.......sb. BMRG07MV 9-18.0S 20-19.0S 118-32.0E 178-25.0E 19960419 19960503 tm.ds....mg.ma.............sb. BMRG08MV 14-17.0S 26-13.0S 178-25.0E 170-42.0W 19960507 19960608 tm.ds....mg.ma.gf.ga....sp.sb. BMRG09MV 32-30.0N 18-48.0S 171-52.0W 117-20.0W 19960611 19960629 tm.ds....mg.ma.gf.ga.35....sb. SOJN01MV 32-42.0N 20-15.0S 149-35.0W 110-01.0W 19960907 19961021 tm.ds....mg.ma.gf.ga.......sb. SOJN02MV 17-14.0S 33-02.0S 149-35.0W 71-37.0W 19961024 19961210 tm.ds....mg.ma.............sb. SOJN04MV 19-45.0S 35-09.0S 18-08.0E 115-41.0E 19970108 19970213 tm.ds......................sb. SOJN05MV 31-55.0S 45-25.0S 114-24.0E 147-30.0E 19970219 19970302 tm.ds....mg.ma.gf.ga....sp.sb. SOJN06MV 42-54.0S 56-55.0S 139-51.0E 147-29.0E 19970307 19970406 tm.ds....mg.ma.............sb. SOJN07MV 37-52.0S 43-39.0S 144-34.0E 149-55.0E 19970410 19970417 tm.ds....mg.ma.gf.ga.......sb. SOJN08MV 17-33.0S 39-18.0S 144-39.0E 149-35.0W 19970514 19970526 tm.ds....mg.ma.............sb. SOJN09MV 32-37.0N 18-11.0S 149-35.0W 109-55.0W 19970531 19970630 tm.ds......................sb. NV9704MV 46-15.0N 32-42.0N 125-38.0W 117-15.0W 19971006 19971010 tm.ds..........gf.ga.......sb. RSCN01MV 33-20.0N 32-38.0N 117-41.0W 117-15.0W 19971013 19971017 tm.ds......................sb. PANR01MV 32-42.0N 14-40.0N 119-40.0W 99-55.0W 19971102 19971211 tm.ds....mg.ma.............sb. PANR02MV* 16-50.0N 12-04.0S 100-00.0W 77-09.0W 19971214 19971229 tm.ds....mg.ma.............sb. PANR03MV* 12-02.0S 33-02.0S 77-35.0W 71-14.0W 19971231 19980112 tm.ds....mg.ma.......35....sb. PANR04MV 27-09.0S 43-04.0S 109-27.0W 71-38.0W 19980114 19980302 tm.ds....mg.ma.gf.ga.35....sb. PANR05MV 17-31.0S 32-00.0S 149-35.0W 109-27.0W 19980305 19980413 tm.ds....mg.ma.............sb. PANR06MVx 21-18.0N 19-49.0S 157-54.0W 112-53.0W 19980417 19980607 tm.ds....mg.ma.......35....sb. PANR07MVx 21-18.0N 19-17.0N 159-11.0W 157-52.0W 19980612 19980620 tm.ds......................sb. PANR08MVx 32-42.0N 21-15.0N 157-39.0W 117-15.0W 19980621 19980630 tm.ds......................sb. NPAL98MV 37-49.0N 32-36.0N 122-41.0W 117-15.0W 19980706 19980718 tm.ds..........gf.ga.......sb. PACS03MV 32-42.0N 2-58.0S 125-21.0W 117-15.0W 19980908 19980929 tm.ds......................sb. AVON01MV 33-51.0N 7-05.0N 171-11.0E 117-15.0W 19990106 19990122 tm.ds....mg.ma.............sb. AVON02MV 7-14.0N 14-26.0S 170-51.0E 168-46.0W 19990124 19990309 tm.ds....mg.ma.gf.ga.......sb. AVON03MV* 13-50.0S 14-39.0S 171-46.0W 168-06.0W 19990309 19990318 tm.ds....mg.ma.gf.ga.......sb. AVON04MV* 12-18.0S 32-12.0S 177-13.0W 170-27.0W 19990321 19990413 tm.ds....mg.ma.gf.ga....sp.sb. AVON05MV 21-18.0N 13-50.0S 171-46.0W 157-54.0W 19990415 19990423 tm.ds....mg.ma.............sb. AVON06MV 30-31.0N 21-06.0N 179-25.0W 156-02.0W 19990428 19990519 tm.ds....mg.ma.gf.ga.35....sb. AVON07MV 31-08.0N 21-14.0N 159-21.0W 157-53.0W 19990524 19990615 tm.ds....mg.ma.............sb. AVON08MV 46-11.0N 21-14.0N 159-29.0W 122-26.0W 19990619 19990703 tm.ds..........gf.ga.......sb. AVON09MV 48-21.0N 38-40.0N 127-17.0W 123-51.0W 19990707 19990802 tm.ds..........gf.ga.35....sb. AVON10MV 40-47.0N 36-02.0N 124-46.0W 122-24.0W 19990805 19990814 tm.ds......................sb. AVON11MV 40-47.0N 37-20.0N 124-34.0W 122-24.0W 19990814 19990818 tm.ds..........gf.ga.......sb. AVON12MV 40-48.0N 32-37.0N 124-43.0W 117-15.0W 19990819 19990825 tm.ds..........gf.ga.......sb. LWAD99MV 44-32.0N 32-37.0N 125-12.0W 117-15.0W 19990904 19990920 tm.ds..........gf.ga.35....sb. MOCE05MV 32-42.0N 21-26.0N 117-19.0W 105-25.0W 19991001 19991021 tm.ds..........gf.ga.......sb. OXMZ01MV* 34-19.0N 22-57.0N 120-24.0W 110-13.0W 19991029 19991122 tm.ds................35....sb. CORE01MV 33-08.0N 32-39.0N 117-43.0W 117-15.0W 19991201 19991203 tm.ds..........gf.ga.......sb. # # ########################################################## # TABLE 2: Cruise-leg Metadata File Example (AVON02MV) # ########################################################## # "institution",institution,"SCRIPPS INSTITUTION OF OCEANOGRAPHY" "vessel",vessel,"R/V MELVILLE" "cruise_id",cruise_id,"AVON02MV" "cruise_name",cruise_name,"AVON EXPEDITION LEG 2" "cruise_ngdc_number",cruise_ngdc_number,"" "client",client,"NSF" "longitude_minimum",longitude_minimum,"170.80540" "longitude_maximum",longitude_maximum,"-168.67150" "latitude_minimum",latitude_minimum,"-14.44812" "latitude_maximum",latitude_maximum,"7.25121" "data_types",data_types,"depth_12khz depth_multibeam magnetics gravity" "cruise_start_port",cruise_start_port,"MAJURO MARSHALL ISLANDS" "cruise_start_date",cruise_start_date,"1999-01-26" "cruise_end_port",cruise_end_port,"PAGO PAGO" "cruise_end_date",cruise_end_date,"1999-03-09" "archivist name",archive_contact_name,"Stephen P. Miller" "archivist title",archive_contact_title,"Head, Geological Data Center" "archivist institution",archive_contact_institution,"Scripps Institution of Oceanography" "archivist street address",archive_contact_street,"9500 Gilman Drive" "archivist city, state and zip code",archive_contact_city,"La Jolla, CA 92093-0220" "archivist phone",archive_contact_phone,"1-858-534-1898" "archivist fax",archive_contact_fax,"1-858-534-0784" "archivist email",archive_contact_email,"spmiller@ucsd.edu" "PI Chief Scientist name",PI_contact_name,"HUBERT STAUDIGEL, SCRIPPS" "PI title",PI_contact_title,"" "PI institution",PI_contact_institution,"" "PI street address",PI_contact_street,"" "PI city, state and zip code",PI_contact_city,"" "PI phone",PI_contact_phone,"" "PI fax",PI_contact_fax,"" "PI email",PI_contact_email,"" "member of scientific party",scientist,"Staudigal, H. Chief Scientist " "member of scientific party",scientist,"Arbesman, K. Volunteer " "member of scientific party",scientist,"Charters, J Computer tech " "member of scientific party",scientist,"Dodds, J. Volunteer " "member of scientific party",scientist,"Herman, S. Volunteer " "member of scientific party",scientist,"Konter, J. Volunteer " "member of scientific party",scientist,"Koppers, A. Scientist " "member of scientific party",scientist,"Lassak, L.M. Volunteer " "member of scientific party",scientist,"Lyons, S. Grad Student " "member of scientific party",scientist,"O'Donnell, G. Grad Student " "member of scientific party",scientist,"Phipps-Morgan, J. Scientist " "member of scientific party",scientist,"Pillard, E. Resident tech " "member of scientific party",scientist,"Sager, W. Scientist " "member of scientific party",scientist,"Taylor, R. Volunteer " "member of scientific party",scientist,"Kantu, K. Observer " "navigation sensor",nav_sensor,"TRIMBLE TASMAN P(Y) GPS" "vertical reference unit sensor",vru_sensor,"Datawell Hippy Model 120" "ship heading sensor",hdg_sensor,"Sperry MK 23 Gyro" "surface sound velocity sensor",ssv_sensor,"" "bathymetric sensor",bathy_sensor,"SEABEAM 2000 w/SIDESCAN" "bathymetric units",bathy_units,"Uncorrected meters, assumed SV 1500m/sec." "magnetic sensor",mag_sensor,"GEOMETRICS MAGNETOMETER MOD-G886" "gravity sensor",grav_sensor,"BELL BGM-3 METER" "seismic reflection sensor",seismic_sensor,"" "navigation comments",nav_comments,"LINEAR FIT TO 60 SEC FIXES" "horizontal datum",horizontal_datum,"WGS84" "ship draft",ship_draft,"5.000000" "data corrected for ship draft",draft_corrected,"YES" "data corrected for tides",tide_corrected,"NO" # # ########################################## # TABLE 3: Data-file Info File Example # ########################################## # Swath Data File: SBunflagfix.99feb18.ed MBIO Data Format ID: 32 Format name: MBF_SB2000SB Informal Description: SIO Swath-bathy SeaBeam 2000 format Attributes: SeaBeam 2000, bathymetry, 121 beams, binary, SIO. Comments in file SBunflagfix.99feb18.ed: Bathymetry data edited interactively using program MBedit version $Id: mbedit_prog.c,v 4.18 1997/09/15 19:06:10 caress Exp $ MB-system Version 4.5 Run by user on cpu at Control Parameters: MBIO data format: 32 Input file: /Work_Disk.4/avon2/slyons/Tok/SBunflagfix.99feb18 Output file: /Work_Disk.4/avon2/slyons/Tok/SBunflagfix.99feb18.ed Program /UWDSYS/bin/swath_fix, Version 1.2 Fri Feb 19 00:14:14 1999 Machine name: mlvl62 User name: scg Program /UWDSYS/bin/swath_fix, Version 1.2 Fri Feb 19 00:14:06 1999 Machine name: mlvl62 User name: scg Program /UWDSYS/bin/swath_unflag, Version 1.3 Fri Feb 19 00:14:04 1999 Machine name: mlvl62 User name: scg Program /UWDSYS/bin/swath_merge, Version 1.2 Fri Feb 19 00:13:35 1999 Machine name: mlvl62 User name: scg Program /UWDSYS/bin/sb2k_mbsysfix, Version 1.0 Fri Feb 19 00:13:34 1999 Machine name: mlvl62 User name: scg Program sb2k_convert, Version 1.1 Fri Feb 19 00:11:42 1999 Machine name: mlvl62 User name: scg Data Totals: Number of Records: 6588 Bathymetry Data (121 beams): Number of Beams: 797148 Number of Good Beams: 732745 91.92% Number of Zero Beams: 12494 1.57% Number of Flagged Beams: 51909 6.51% Amplitude Data (0 beams): Number of Beams: 0 Number of Good Beams: 0 0.00% Number of Zero Beams: 0 0.00% Number of Flagged Beams: 0 0.00% Sidescan Data (0 pixels): Number of Pixels: 0 Number of Good Pixels: 0 0.00% Number of Zero Pixels: 0 0.00% Number of Flagged Pixels: 0 0.00% Navigation Totals: Total Time: 23.9950 hours Total Track Length: 219.7818 km Average Speed: 9.1595 km/hr ( 4.9511 knots) Start of Data: Time: 02 17 1999 23:53:25.500000 JD48 Lon: -176.1951 Lat: -0.6481 Depth: 2619.0000 meters Speed: 1.2284 km/hr ( 0.6640 knots) Heading: 193.6000 degrees Sonar Depth: 0.0000 m Sonar Altitude: 2619.0000 m End of Data: Time: 02 18 1999 23:53:07.500000 JD49 Lon: -176.1210 Lat: -1.3291 Depth: 2264.0000 meters Speed: 2.0979 km/hr ( 1.1340 knots) Heading: 178.0000 degrees Sonar Depth: 0.0000 m Sonar Altitude: 2264.0000 m Limits: Minimum Longitude: -176.4040 Maximum Longitude: -175.9800 Minimum Latitude: -1.3300 Maximum Latitude: -0.6384 Minimum Sonar Depth: 0.0000 Maximum Sonar Depth: 0.0000 Minimum Altitude: 1114.0000 Maximum Altitude: 4965.0000 Minimum Depth: 1111.0000 Maximum Depth: 5279.0000 #(end documentation file)