/*--------------------------------------------------------------------
 *    The MB-system:	mbf_sbsiomrg.h	1/20/93
 *	$Id: mbf_sbsiomrg.h 1770 2009-10-19 17:16:39Z caress $
 *
 *    Copyright (c) 1993-2009 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_sbsiomrg.h defines the data structure used by MBIO functions
 * to store multibeam data read from the  MBF_SBSIOMRG format (MBIO id 11).  
 *
 * Author:	D. W. Caress
 * Date:	January 20, 1993
 * $Log: mbf_sbsiomrg.h,v $
 * Revision 5.3  2003/04/17 21:05:23  caress
 * Release 5.0.beta30
 *
 * Revision 5.2  2002/10/15 18:34:58  caress
 * Release 5.0.beta25
 *
 * 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 4.4  2000/09/30  06:34:20  caress
 * Snapshot for Dale.
 *
 * Revision 4.3  1998/10/05  18:32:27  caress
 * MB-System version 4.6beta
 *
 * Revision 4.2  1997/04/21  17:02:07  caress
 * MB-System 4.5 Beta Release.
 *
 * Revision 4.2  1997/04/21  17:02:07  caress
 * MB-System 4.5 Beta Release.
 *
 * Revision 4.1  1994/10/21  12:20:01  caress
 * Release V4.0
 *
 * Revision 4.1  1994/10/21  12:20:01  caress
 * Release V4.0
 *
 * Revision 4.0  1994/03/06  00:01:56  caress
 * First cut at version 4.0
 *
 * Revision 4.2  1994/03/03  03:39:43  caress
 * Fixed copyright message.
 *
 * Revision 4.1  1994/02/17  21:19:08  caress
 * Updated associated MBIO format id in comments.
 *
 * Revision 4.0  1994/02/17  20:59:54  caress
 * First cut at new version. No changes.
 *
 * Revision 3.0  1993/05/14  22:53:48  sohara
 * initial version
 *
 */
/*
 * Notes on the MBF_SBSIOMRG data format:
 *   1. This data format is used to store 16 beam Sea Beam bathymetry
 *      data.  This format was created and used by the Scripps
 *      Institution of Oceanography; most data files in this format
 *      consist of Sea Beam data collected on the R/V Thomas Washington.
 *   2. The data consist of 100 byte records with 50 2-byte signed
 *      integer words.  
 *   3. The 16 depth values are stored uncentered (the depth values
 *      are centered in most formats).
 *   4. Comments can be embedded in the data as 100 byte ascii strings,
 *	where the first two characters must always be "##" so that
 *      the year value is greater than 7000.  
 *   5. Data files created in the early 1980's on an IBM 1800 may have
 *      padding records consisting entirely of zeros; these may be 
 *      recognized by the year being 0 and should be ignored.
 *   6. Information on this format was obtained from the Geological
 *      Data Center at the Scripps Institution of Oceanography
 *
 * The kind value in the mbf_sbsiomrg_struct indicates whether the
 * mbf_sbsiomrg_data_struct structure holds data (kind = 1) or an
 * ascii comment record (kind = 2).
 *
 * The mbf_sbsiomrg_data_struct structure is a direct representation 
 * of the binary data structure used in the MBF_SBSIOMRG format.
 */
 
 /* size of data records */
#define MBF_SBSIOMRG_RECORD_SIZE	100

/* number of beams in raw and processed pings */
#define	MB_BEAMS_RAW_SBSIOMRG	16
#define	MB_BEAMS_PROC_SBSIOMRG	19

struct mbf_sbsiomrg_data_struct
	{
	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	lon2u;		/* minutes east of prime meridian */
	short	lon2b;		/* fraction of minute times 10000 */
	short	lat2u;		/* number of minutes north of 90S */
	short	lat2b;		/* fraction of minute times 10000 */
	short	spare1[3];	/* unused */
	unsigned short	sbtim;	/* Sea Beam computer clock time in 10ths of
					seconds from start of hour (0-3600) */
	unsigned short	sbhdg;	/* Sea Beam gyro heading 
					0 = 0 degrees
					1 = 0.0055 degrees
					16384 = 90 degrees
					65535 = 359.9945 degrees
					0 = 360 degrees */
	short	deph[16];	/* 16 depths from Sea Beam in meters
					assuming 1500 m/s water velocity */
	short	dist[16];	/* 16 cross track distances in meters from port
					(negative) to starboard (positive) */
	short	spare2[5];	/* unused */
	};

struct mbf_sbsiomrg_struct
	{
	int	kind;
	struct mbf_sbsiomrg_data_struct data;
	};