/*-------------------------------------------------------------------- * The MB-system: mbf_sbifremr.h 3/29/96 * $Id: mbf_sbifremr.h 1917 2012-01-10 19:25:33Z caress $ * * Copyright (c) 1996-2012 by * David W. Caress (caress@mbari.org) * Monterey Bay Aquarium Research Institute * Moss Landing, CA 95039 * and Dale N. Chayes (dale@ldeo.columbia.edu) * Lamont-Doherty Earth Observatory * Palisades, NY 10964 * * See README file for copying and redistribution conditions. *--------------------------------------------------------------------*/ /* * mbf_sbifremr.h defines the data structure used by MBIO functions * to store multibeam data read from the MBF_SBIFREMR format (MBIO id 17). * * Author: D. W. Caress * Date: March 29, 1996 * Location: 152 39.061W; 34 09.150S on R/V Ewing * * $Log: mbf_sbifremr.h,v $ * Revision 5.2 2003/04/17 21:05:23 caress * Release 5.0.beta30 * * Revision 5.1 2002/09/18 23:32:59 caress * Release 5.0.beta23 * * Revision 5.0 2000/12/01 22:48:41 caress * First cut at Version 5.0. * * Revision 4.2 2000/09/30 06:34:20 caress * Snapshot for Dale. * * Revision 4.1 1998/10/05 18:32:27 caress * MB-System version 4.6beta * * Revision 4.0 1996/04/22 10:59:51 caress * Initial version. * * Revision 4.0 1996/04/22 10:59:51 caress * Initial version. * * */ /* * Notes on the MBF_SBIFREMR data format: * 1. This data format is used to store 16 beam Sea Beam bathymetry * data. This format was created and used by IFREMER in Brest, * France. IFREMER archives SeaBeam "Classic" data from the * R/V Jean Charcot and the R/V Sonne (and probably other * vessels) in this format. * 2. The data consist of ASCII text. The data is stored in a * sounding oriented rather than swath oriented fashion, with * a separate record for each beam value. * 3. Each 108 character line contains the beam position, depth, * ping number, beam number, sounding number, and ping time. * The ship's position can be obtained as that of the * the center beam (beam 10 out of beams 1-19) and the heading * can be calculated from the orientation of the starboard * and port outer beams. When the center beam and its location * are missing, the ping is ignored. Thus, DATA CAN BE LOST * when this format is read with MB-System programs. * 4. Comments can be embedded in the data as lines beginning * with "##". * 5. The depth values are stored as negative numbers (topography * rather than bathymetry). In order to accomodate flagging * of suspect depths, the flagged depths are stored as * positive numbers. This does not affect the internal * MB-System convention of flagging depths with negative * numbers. * 6. Information on this format was obtained from IFREMER. * * The kind value in the mbf_sbifremr_struct indicates whether the * mbf_sbifremr_data_struct structure holds data (kind = 1) or an * ascii comment record (kind = 2). */ /* maximum comment length in characters */ #define MBF_SBIFREMR_MAXLINE 200 /* number of beams in format */ #define MBF_SBIFREMR_NUM_BEAMS 19 /* angle spacing for SeaBeam Classic */ #define MBF_SBIFREMR_ANGLE_SPACING 2.62 struct mbf_sbifremr_struct { int kind; /* comment flag (comment if != 1) */ short year; /* year (4 digits) */ short day; /* julian day (1-366) */ short min; /* minutes from beginning of day (0-1439) */ short sec; /* seconds from beginning of minute (0-59) */ short lat2u; /* number of minutes north of 90S */ short lat2b; /* fraction of minute times 10000 */ short lon2u; /* minutes east of prime meridian */ short lon2b; /* fraction of minute times 10000 */ unsigned short sbhdg; /* SeaBeam gyro heading 0 = 0 degrees 1 = 0.0055 degrees 16384 = 90 degrees 65535 = 359.9945 degrees 0 = 360 degrees */ short deph[MBF_SBIFREMR_NUM_BEAMS]; /* 16 depths from Sea Beam in meters assuming 1500 m/s water velocity */ short dist[MBF_SBIFREMR_NUM_BEAMS]; /* 16 cross track distances in meters from port (negative) to starboard (positive) */ double lon[MBF_SBIFREMR_NUM_BEAMS]; /* longitudes of beam values */ double lat[MBF_SBIFREMR_NUM_BEAMS]; /* latitudes of beam values */ char comment[MBF_SBIFREMR_MAXLINE]; };