File:  [ELWIX - Embedded LightWeight unIX -] / embedaddon / ntp / include / mbg_gps166.h
Revision 1.1: download - view: text, annotated - select for diffs - revision graph
Tue May 29 12:08:38 2012 UTC (12 years, 1 month ago) by misho
CVS tags: MAIN, HEAD
Initial revision

    1: /*
    2:  * /src/NTP/REPOSITORY/ntp4-dev/include/mbg_gps166.h,v 4.7 2006/06/22 18:41:43 kardel RELEASE_20060622_A
    3:  *
    4:  * mbg_gps166.h,v 4.7 2006/06/22 18:41:43 kardel RELEASE_20060622_A
    5:  *
    6:  * $Created: Sun Jul 20 09:20:50 1997 $
    7:  *
    8:  * File GPSSERIO.H Copyright (c) by Meinberg Funkuhren (www.meinberg.de)
    9:  *
   10:  * Linkage to PARSE:
   11:  * Copyright (c) 1997-2005 by Frank Kardel <kardel <AT> ntp.org>
   12:  *
   13:  * Redistribution and use in source and binary forms, with or without
   14:  * modification, are permitted provided that the following conditions
   15:  * are met:
   16:  * 1. Redistributions of source code must retain the above copyright
   17:  *    notice, this list of conditions and the following disclaimer.
   18:  * 2. Redistributions in binary form must reproduce the above copyright
   19:  *    notice, this list of conditions and the following disclaimer in the
   20:  *    documentation and/or other materials provided with the distribution.
   21:  * 3. Neither the name of the author nor the names of its contributors
   22:  *    may be used to endorse or promote products derived from this software
   23:  *    without specific prior written permission.
   24:  *
   25:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   26:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   27:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   28:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   29:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   30:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   31:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35:  * SUCH DAMAGE.
   36:  *
   37:  */
   38: #ifndef MBG_GPS166_H
   39: #define MBG_GPS166_H
   40: 
   41: 
   42: /***************************************************************************/
   43: /*                                                                         */
   44: /*   File:         GPSSERIO.H                    4.1                       */
   45: /*                                                                         */
   46: /*   Project:      Common C Library                                        */
   47: /*                                                                         */
   48: /*   Compiler:     Borland C++                                             */
   49: /*                                                                         */
   50: /*   Author:       M. Burnicki,  Meinberg Funkuhren                        */
   51: /*                                                                         */
   52: /*                                                                         */
   53: /*   Description:                                                          */
   54: /*     This file defines structures and codes to be used to access GPS166  */
   55: /*     via its serial interface COM0. COM0 should be set to a high baud    */
   56: /*     rate, default is 19200.                                             */
   57: /*                                                                         */
   58: /*     Standard GPS166 serial operation is to send a time string that is   */
   59: /*     compatible with Meinberg UA31 or PZF535 DCF77 radio remote clocks.  */
   60: /*     That string can be transmitted automatically once per second, once  */
   61: /*     per minute or on request per ASCII '?'.                             */
   62: /*                                                                         */
   63: /*     Parameter setup or parameter readout works using blocks of binary   */
   64: /*     data which have to be isolated from the standard string. A block of */
   65: /*     data starts with a SOH code (ASCII Start Of Header, 0x01) followed  */
   66: /*     by a message header with constant length and a data portion with    */
   67: /*     variable length. The first field (cmd) of the message header holds  */
   68: /*     the command code rsp. the type of data to be transmitted. The next  */
   69: /*     field (len) gives the number of data bytes that are transmitted     */
   70: /*     after the header. This number ranges from 0 to sizeof( MSG_DATA ).  */
   71: /*     The third field (data_csum) holds a checksum of all data bytes and  */
   72: /*     the last field of the header finally holds the checksum of the.     */
   73: /*     header.                                                             */
   74: /*                                                                         */
   75: /***************************************************************************/
   76: 
   77: /* the control codes defined below are to be or'ed with a command/type code */
   78: 
   79: #define GPS_REQACK    0x8000   /* to GPS166: request acknowledge */
   80: #define GPS_ACK       0x4000   /* from GPS166: acknowledge a command */
   81: #define GPS_NACK      0x2000   /* from GPS166: error receiving command */
   82: 
   83: #define GPS_CTRL_MSK  0xF000   /* masks control code from command */
   84: 
   85: 
   86: /* The codes below specify commands/types of data to be supplied to GPS166: */
   87: 
   88: /*                            GPS166 auto-message to host            */
   89: /*                            þ   host request, GPS166 response      */
   90: /*                            þ   þ   host download to GPS166        */
   91: /*                            þ   þ   þ                              */
   92: enum {  /*                    þ   þ   þ                              */
   93:   /* system data */
   94:   GPS_AUTO_ON = 0x000,   /* þ   þ   þ X þ enable auto-messages from GPS166 */
   95:   GPS_AUTO_OFF,          /* þ   þ   þ X þ disable auto-messages from GPS166 */
   96:   GPS_SW_REV,            /* þ   þ X þ   þ request software revision */
   97:   GPS_STAT,              /* þ   þ X þ   þ request status of buffered variables */
   98:   GPS_TIME,              /* þ X þ   þ X þ current time or capture or init board time */
   99:   GPS_POS_XYZ,           /* þ   þ X þ X þ current position in ECEF coords */
  100:   GPS_POS_LLA,           /* þ   þ X þ X þ current position in geographic coords */
  101:   GPS_TZDL,              /* þ   þ X þ X þ time zone / daylight saving */
  102:   GPS_PORT_PARM,         /* þ   þ X þ X þ parameters of the serial ports */
  103:   GPS_SYNTH,             /* þ   þ X þ X þ synthesizer's frequency and phase */
  104:   GPS_ANT_INFO,          /* þ X þ X þ   þ time diff after antenna disconnect */
  105:   GPS_UCAP,              /* þ X þ X þ   þ user capture */
  106: 
  107:   /* GPS data */
  108:   GPS_CFGH = 0x100,      /* þ   þ X þ X þ SVs' configuration and health codes */
  109:   GPS_ALM,               /* þ   þ X þ X þ one SV's almanac */
  110:   GPS_EPH,               /* þ   þ X þ X þ one SV's ephemeris */
  111:   GPS_UTC,               /* þ   þ X þ X þ UTC correction parameters */
  112:   GPS_IONO,              /* þ   þ X þ X þ ionospheric correction parameters */
  113:   GPS_ASCII_MSG          /* þ   þ X þ   þ the GPS ASCII message */
  114: };
  115: 
  116: /*
  117:  * modelled after GPSDEFS.H Revision 1.5
  118:  */
  119: /***************************************************************************/
  120: /*                                                                         */
  121: /*   File:         GPSDEFS.H                     4.1          */
  122: /*                                                                         */
  123: /*   Project:      Common C Library                                        */
  124: /*                                                                         */
  125: /*   Compiler:     Borland C++                                             */
  126: /*                                                                         */
  127: /*   Author:       M. Burnicki,  Meinberg Funkuhren                        */
  128: /*                                                                         */
  129: /*                                                                         */
  130: /*   Description:                                                          */
  131: /*     General definitions to be used with GPS166                          */
  132: /*     GPS166 Rev. 1.23 or above                                           */
  133: /*                                                                         */
  134: /*   Modifications: see file GPSLIB.TXT                                    */
  135: /*                                                                         */
  136: /***************************************************************************/
  137: #define _GPSDEFS_H
  138: /* the type of various checksums */
  139: 
  140: #ifndef _CSUM_DEFINED
  141:   typedef unsigned short CSUM;
  142: #  define _CSUM_DEFINED
  143: #endif
  144: 
  145: /* the message header */
  146: 
  147: typedef struct {
  148:   unsigned short gps_cmd;
  149:   unsigned short gps_len;
  150:   unsigned short gps_data_csum;
  151:   unsigned short gps_hdr_csum;
  152: } GPS_MSG_HDR;
  153: 
  154: /* a struct used to hold the software revision information */
  155: 
  156: typedef struct {
  157:   unsigned short code;       /* e.g. 0x0120 means rev. 1.20 */
  158:   unsigned char name[17];     /* used to identify customized versions */
  159: } SW_REV;
  160: 
  161: /* GPS ASCII message */
  162: 
  163: typedef struct {
  164:   CSUM csum;       /* checksum of the remaining bytes */
  165:   short valid;     /* flag data are valid */
  166:   char s[23];      /* 22 chars GPS ASCII message plus trailing zero */
  167: } ASCII_MSG;
  168: 
  169: #define MIN_SVNO         1                  /* min. SV number */
  170: #define MAX_SVNO        32                  /* max. SV number */
  171: #define N_SVNO ( MAX_SVNO - MIN_SVNO + 1)   /* number of possibly active SVs */
  172: 
  173: 
  174: typedef short          SVNO;     /* the number of a SV */
  175: typedef unsigned short HEALTH;  /* a SV's health code */
  176: typedef unsigned short CFG;     /* a SV's configuration code */
  177: typedef unsigned short IOD;     /* Issue-Of-Data code */
  178: 
  179: /* Date and time referred to the linear time scale defined by GPS. */
  180: /* GPS time is defined by the number of weeks since midnight from */
  181: /* January 5, 1980 to January 6, 1980 plus the number of seconds of */
  182: /* the current week plus fractions of a second. GPS time differs from */
  183: /* UTC because UTC is corrected with leap seconds while GPS time scale */
  184: /* is continuous. */
  185: 
  186: typedef struct {
  187:   unsigned short wn;     /* the week number since GPS has been installed */
  188:   unsigned long sec;     /* the second of that week */
  189:   unsigned long tick;    /* fractions of a second; scale: 1E-7 */
  190: } T_GPS;
  191: 
  192: 
  193: /* Local date and time computed from GPS time. The current number */
  194: /* of leap seconds have to be added to get UTC from GPS time. */
  195: /* Additional corrections could have been made according to the */
  196: /* time zone/daylight saving parameters (TZDL, see below) defined */
  197: /* by the user. The status field can be checked to see which corrections */
  198: /* have been applied. */
  199: 
  200: #ifndef _TM_DEFINED
  201:   typedef struct {
  202:     short year;          /* 0..9999 */
  203:     char month;          /* 1..12 */
  204:     char mday;           /* 1..31 */
  205:     short yday;          /* 1..366 */
  206:     char wday;           /* 0..6 == Sun..Sat */
  207:     char hour;           /* 0..23 */
  208:     char minute;         /* 0..59 */
  209:     char second;         /* 0..59 */
  210:     long frac;           /* fractions of a second, scale 1E-7 */
  211:     long offs_from_utc;  /* local time's offset from UTC */
  212:     unsigned short status;       /* flags */
  213:   } TM;
  214: 
  215:   /* status flags used with conversion from GPS time to local time */
  216: 
  217: #  define TM_UTC        0x01   /* UTC correction has been made */
  218: #  define TM_LOCAL      0x02   /* UTC has been converted to local time */
  219: #  define TM_DL_ANN     0x04   /* state of daylight saving is going to change */
  220: #  define TM_DL_ENB     0x08   /* daylight saving is enabled */
  221: #  define TM_LS_ANN     0x10   /* leap second will be inserted */
  222: #  define TM_LS_ENB     0x20   /* current second is leap second */
  223: 
  224: #  define _TM_DEFINED
  225: #endif
  226: 
  227: 
  228: /* the status flags below are defined starting with rev. 1.32 */
  229: 
  230: #define TM_ANT_DISCONN  0x1000  /* antenna currently disconnected */
  231: #define TM_SYN_FLAG     0x2000  /* TIME_SYN output is low */
  232: #define TM_NO_SYNC      0x4000  /* not sync'ed after reset */
  233: #define TM_NO_POS       0x8000  /* position not computed after reset, */
  234:                                 /*   LOCK LED off */
  235: 
  236: /* a struct used to transmit information on date and time */
  237: 
  238: typedef struct {
  239:   short channel;        /* -1: the current time; 0, 1: capture 0, 1 */
  240:   T_GPS t;              /* time in GPS format */
  241:   TM tm;                /* that time converted to local time */
  242: } TTM;
  243: 
  244: 
  245: 
  246: /* Two types of variables used to store a position. Type XYZ is */
  247: /* used with a position in earth centered, earth fixed (ECEF) */
  248: /* coordinates whereas type LLA holds such a position converted */
  249: /* to geographic coordinates as defined by WGS84 (World Geodetic */
  250: /* System from 1984). */
  251: 
  252: #ifndef _XYZ_DEFINED
  253:   /* sequence and number of components of a cartesian position */
  254:   enum { XP, YP, ZP, N_XYZ };
  255: 
  256:   /* a type of array holding a cartesian position */
  257:   typedef l_fp XYZ[N_XYZ];      /* values are in [m] */
  258: 
  259: #  define _XYZ_DEFINED
  260: #endif
  261: 
  262: 
  263: #ifndef _LLA_DEFINED
  264:   /* sequence and number of components of a geographic position */
  265:   enum { LAT, LON, ALT, N_LLA };  /* latitude, longitude, altitude */
  266: 
  267:   /* a type of array holding a geographic position */
  268:   typedef l_fp LLA[N_LLA];      /* lon, lat in [rad], alt in [m] */
  269: 
  270: #  define _LLA_DEFINED
  271: #endif
  272: 
  273: /* Synthesizer parameters. Synthesizer frequency is expressed as a */
  274: /* four digit decimal number (freq) to be multiplied by 0.1 Hz and an */
  275: /* base 10 exponent (range). If the effective frequency is less than */
  276: /* 10 kHz its phase is synchronized corresponding to the variable phase. */
  277: /* Phase may be in a range from -360° to +360° with a resolution of 0.1°, */
  278: /* so the resulting numbers to be stored are in a range of -3600 to +3600. */
  279: 
  280: /* Example: */
  281: /* Assume the value of freq is 2345 (decimal) and the value of phase is 900. */
  282: /* If range == 0 the effective frequency is 234.5 Hz with a phase of +90°. */
  283: /* If range == 1 the synthesizer will generate a 2345 Hz output frequency */
  284: /* and so on. */
  285: 
  286: /* Limitations: */
  287: /* If freq == 0 the synthesizer is disabled. If range == 0 the least */
  288: /* significant digit of freq is limited to 0, 3, 5 or 6. The resulting */
  289: /* frequency is shown in the examples below: */
  290: /*     freq == 1230  -->  123.0 Hz */
  291: /*     freq == 1233  -->  123 1/3 Hz (real 1/3 Hz, NOT 123.3 Hz) */
  292: /*     freq == 1235  -->  123.5 Hz */
  293: /*     freq == 1236  -->  123 2/3 Hz (real 2/3 Hz, NOT 123.6 Hz) */
  294: 
  295: /* If range == MAX_RANGE the value of freq must not exceed 1200, so the */
  296: /* output frequency is limited to 12 MHz. */
  297: 
  298: /* Phase will be ignored if the resulting frequency is greater or equal */
  299: /* to 10 kHz. */
  300: 
  301: #define MAX_SYNTH_FREQ   1200    /* if range == MAX_SYNTH_RANGE */
  302: #define MIN_SYNTH_RANGE     0
  303: #define MAX_SYNTH_RANGE     5
  304: #define MAX_SYNTH_PHASE  3600
  305: 
  306: typedef struct {
  307:   short freq;      /* four digits used; scale: 0.1; e.g. 1234 -> 123.4 Hz */
  308:   short range;     /* scale factor for freq; 0..MAX_SYNTH_RANGE */
  309:   short phase;     /* -MAX_SYNTH_PHASE..+MAX_SYNTH_PHASE; >0 -> pulses later */
  310: } SYNTH;
  311: 
  312: 
  313: 
  314: /* Time zone/daylight saving parameters. */
  315: 
  316: /* the name of a time zone, 5 characters plus trailing zero */
  317: typedef char TZ_NAME[6];
  318: 
  319: typedef struct {
  320:   long offs;         /* offset from UTC to local time [sec] */
  321:   long offs_dl;      /* additional offset if daylight saving enabled [sec] */
  322:   TM tm_on;          /* date/time when daylight saving starts */
  323:   TM tm_off;         /* date/time when daylight saving ends */
  324:   TZ_NAME name[2];   /* names without and with daylight saving enabled */
  325: } TZDL;
  326: 
  327: /* The constant below is defined beginning with software rev. 1.29. */
  328: /* If the year in tzdl.tmon and tzdl.tm_off is or'ed with that constant, */
  329: /* the receiver automatically generates daylight saving year by year. */
  330: /* See GPSLIB.TXT for more information. */
  331: 
  332: #define DL_AUTO_FLAG  0x8000
  333: 
  334: /* Example: */
  335: /* for automatic daylight saving enable/disable in Central Europe, */
  336: /* the variables are to be set as shown below: */
  337: /*   offs = 3600L           one hour from UTC */
  338: /*   offs_dl = 3600L        one additional hour if daylight saving enabled */
  339: /*   tm_on = first Sunday from March 25, 02:00:00h ( year |= DL_AUTO_FLAG ) */
  340: /*   tm_off = first Sunday from Sept 24, 03:00:00h ( year |= DL_AUTO_FLAG ) */
  341: /*   name[0] == "MEZ  "     name if daylight saving not enabled */
  342: /*   name[1] == "MESZ "     name if daylight saving is enabled */
  343: 
  344: 
  345: 
  346: 
  347: /* the structure below was defined in rev. 1.31. It reflects the status */
  348: /* of the antenna, the times of last disconnect/reconnect and the boards */
  349: /* clock offset after the phase of disconnection. */
  350: 
  351: typedef struct {
  352:   short status;    /* current status of antenna */
  353:   TM tm_disconn;   /* time of antenna disconnect */
  354:   TM tm_reconn;    /* time of antenna reconnect */
  355:   long delta_t;    /* clock offset at reconnect time, units: TICKS_PER_SEC */
  356: } ANT_INFO;
  357: 
  358: 
  359: /* the status field may be set to one of the values below: */
  360: 
  361: enum {
  362:   ANT_INVALID,   /* struct not set yet because ant. has not been disconn. */
  363:   ANT_DISCONN,   /* ant. now disconn., tm_reconn and delta_t not set */
  364:   ANT_RECONN     /* ant. has been disconn. and reconn., all fields valid */
  365: };
  366: 
  367: 
  368: /* Summary of configuration and health data of all SVs. */
  369: 
  370: typedef struct {
  371:   CSUM csum;               /* checksum of the remaining bytes */
  372:   short valid;             /* flag data are valid */
  373: 
  374:   T_GPS tot_51;            /* time of transmission, page 51 */
  375:   T_GPS tot_63;            /* time of transmission, page 63 */
  376:   T_GPS t0a;               /* complete reference time almanac */
  377: 
  378:   CFG cfg[N_SVNO];         /* SV configuration from page 63 */
  379:   HEALTH health[N_SVNO];   /* SV health from pages 51, 63 */
  380: } CFGH;
  381: 
  382: 
  383: 
  384: /* UTC correction parameters */
  385: 
  386: typedef struct {
  387:   CSUM csum;       /*    checksum of the remaining bytes                  */
  388:   short valid;     /*    flag data are valid                              */
  389: 
  390:   T_GPS t0t;       /*    Reference Time UTC Parameters              [sec] */
  391:   l_fp A0;         /*  ± Clock Correction Coefficient 0             [sec] */
  392:   l_fp A1;         /*  ± Clock Correction Coefficient 1         [sec/sec] */
  393: 
  394:   u_short WNlsf;   /*  week number of nearest leap second                 */
  395:   short DNt;       /*  the day number at the end of which LS is inserted  */
  396:   char delta_tls;  /*                                                     */
  397:   char delta_tlsf; /*                                                     */
  398: 
  399: } UTC;
  400: 
  401: /* a struct used to hold the settings of a serial port */
  402: 
  403: #ifndef _COM_PARM_DEFINED
  404:   typedef long BAUD_RATE;
  405: 
  406:   /* indices used to identify a parameter in the framing string */
  407:   enum { F_DBITS, F_PRTY, F_STBITS };
  408: 
  409:   /* types of handshake */
  410:   enum { HS_NONE, HS_XONXOFF, HS_RTSCTS };
  411: 
  412:   typedef struct {
  413:     BAUD_RATE baud_rate;    /* e.g. 19200L */
  414:     char framing[4];        /* e.g. "8N1" */
  415:     short handshake;        /* a numeric value, only HS_NONE supported yet */
  416:   } COM_PARM;
  417: 
  418: #define _COM_PARM_DEFINED
  419: #endif
  420: 
  421: 
  422: 
  423: /* the codes below define what has to comes out of the serial ports */
  424: 
  425: enum { STR_ON_REQ, STR_PER_SEC,
  426:        STR_PER_MIN, N_STR_MODE_0,      /* COM0 and COM1 */
  427:        STR_UCAP = N_STR_MODE_0,
  428:        STR_UCAP_REQ, N_STR_MODE_1      /* COM1 only */
  429:      };
  430: 
  431: 
  432: #define N_COM   2  /* the number of serial ports */
  433: 
  434: /* the structure used to store the modes of both serial ports */
  435: 
  436: typedef struct {
  437:   COM_PARM com[N_COM];    /* COM0 and COM1 settings */
  438:   u_char mode[N_COM];      /* COM0 and COM1 output mode */
  439: } PORT_PARM;
  440: 
  441: /* Ephemeris parameters of one specific SV. Needed to compute the position */
  442: /* of a satellite at a given time with high precision. Valid for an */
  443: /* interval of 4 to 6 hours from start of transmission. */
  444: 
  445: typedef struct {
  446:   CSUM csum;       /*    checksum of the remaining bytes                  */
  447:   short valid;     /*    flag data are valid                              */
  448: 
  449:   HEALTH health;   /*    health indication of transmitting SV      [---]  */
  450:   IOD IODC;        /*    Issue Of Data, Clock                             */
  451:   IOD IODE2;       /*    Issue of Data, Ephemeris (Subframe 2)            */
  452:   IOD IODE3;       /*    Issue of Data, Ephemeris (Subframe 3)            */
  453:   T_GPS tt;        /*    time of transmission                             */
  454:   T_GPS t0c;       /*    Reference Time Clock                      [---]  */
  455:   T_GPS t0e;       /*    Reference Time Ephemeris                  [---]  */
  456: 
  457:   l_fp   sqrt_A;   /*    Square Root of semi-major Axis        [sqrt(m)]  */
  458:   l_fp   e;        /*    Eccentricity                              [---]  */
  459:   l_fp   M0;       /*  ± Mean Anomaly at Ref. Time                 [rad]  */
  460:   l_fp   omega;    /*  ± Argument of Perigee                       [rad]  */
  461:   l_fp   OMEGA0;   /*  ± Longit. of Asc. Node of orbit plane       [rad]  */
  462:   l_fp   OMEGADOT; /*  ± Rate of Right Ascension               [rad/sec]  */
  463:   l_fp   deltan;   /*  ± Mean Motion Diff. from computed value [rad/sec]  */
  464:   l_fp   i0;       /*  ± Inclination Angle                         [rad]  */
  465:   l_fp   idot;     /*  ± Rate of Inclination Angle             [rad/sec]  */
  466:   l_fp   crc;      /*  ± Cosine Corr. Term to Orbit Radius           [m]  */
  467:   l_fp   crs;      /*  ± Sine Corr. Term to Orbit Radius             [m]  */
  468:   l_fp   cuc;      /*  ± Cosine Corr. Term to Arg. of Latitude     [rad]  */
  469:   l_fp   cus;      /*  ± Sine Corr. Term to Arg. of Latitude       [rad]  */
  470:   l_fp   cic;      /*  ± Cosine Corr. Term to Inclination Angle    [rad]  */
  471:   l_fp   cis;      /*  ± Sine Corr. Term to Inclination Angle      [rad]  */
  472: 
  473:   l_fp   af0;      /*  ± Clock Correction Coefficient 0            [sec]  */
  474:   l_fp   af1;      /*  ± Clock Correction Coefficient 1        [sec/sec]  */
  475:   l_fp   af2;      /*  ± Clock Correction Coefficient 2       [sec/sec²]  */
  476:   l_fp   tgd;      /*  ± estimated group delay differential        [sec]  */
  477: 
  478:   u_short URA;      /*    predicted User Range Accuracy                    */
  479: 
  480:   u_char L2code;    /*    code on L2 channel                         [---] */
  481:   u_char L2flag;    /*    L2 P data flag                             [---] */
  482: 
  483: } EPH;
  484: 
  485: /* Almanac parameters of one specific SV. A reduced precision set of */
  486: /* parameters used to check if a satellite is in view at a given time. */
  487: /* Valid for an interval of more than 7 days from start of transmission. */
  488: 
  489: typedef struct {
  490:   CSUM csum;       /*    checksum of the remaining bytes                  */
  491:   short valid;     /*    flag data are valid                              */
  492: 
  493:   HEALTH health;   /*                                               [---] */
  494:   T_GPS t0a;       /*    Reference Time Almanac                     [sec] */
  495: 
  496:   l_fp   sqrt_A;   /*    Square Root of semi-major Axis         [sqrt(m)] */
  497:   l_fp   e;        /*    Eccentricity                               [---] */
  498: 
  499:   l_fp   M0;       /*  ± Mean Anomaly at Ref. Time                  [rad] */
  500:   l_fp   omega;    /*  ± Argument of Perigee                        [rad] */
  501:   l_fp   OMEGA0;   /*  ± Longit. of Asc. Node of orbit plane        [rad] */
  502:   l_fp   OMEGADOT; /*  ± Rate of Right Ascension                [rad/sec] */
  503:   l_fp   deltai;   /*  ±                                            [rad] */
  504:   l_fp   af0;      /*  ± Clock Correction Coefficient 0             [sec] */
  505:   l_fp   af1;      /*  ± Clock Correction Coefficient 1         [sec/sec] */
  506: } ALM;
  507: 
  508: 
  509: /* ionospheric correction parameters */
  510: 
  511: typedef struct {
  512:   CSUM csum;       /*    checksum of the remaining bytes                  */
  513:   short valid;     /*    flag data are valid                              */
  514: 
  515:   l_fp   alpha_0;  /*    Ionosph. Corr. Coeff. Alpha 0              [sec] */
  516:   l_fp   alpha_1;  /*    Ionosph. Corr. Coeff. Alpha 1          [sec/deg] */
  517:   l_fp   alpha_2;  /*    Ionosph. Corr. Coeff. Alpha 2        [sec/deg^2] */
  518:   l_fp   alpha_3;  /*    Ionosph. Corr. Coeff. Alpha 3        [sec/deg^3] */
  519: 
  520:   l_fp   beta_0;   /*    Ionosph. Corr. Coeff. Beta 0               [sec] */
  521:   l_fp   beta_1;   /*    Ionosph. Corr. Coeff. Beta 1           [sec/deg] */
  522:   l_fp   beta_2;   /*    Ionosph. Corr. Coeff. Beta 2         [sec/deg^2] */
  523:   l_fp   beta_3;   /*    Ionosph. Corr. Coeff. Beta 3         [sec/deg^3] */
  524: 
  525: } IONO;
  526: 
  527: void mbg_tm_str (char **, TM *, int);
  528: void mbg_tgps_str (char **, T_GPS *, int);
  529: void get_mbg_header (unsigned char **, GPS_MSG_HDR *);
  530: void put_mbg_header (unsigned char **, GPS_MSG_HDR *);
  531: void get_mbg_sw_rev (unsigned char **, SW_REV *);
  532: void get_mbg_ascii_msg (unsigned char **, ASCII_MSG *);
  533: void get_mbg_svno (unsigned char **, SVNO *);
  534: void get_mbg_health (unsigned char **, HEALTH *);
  535: void get_mbg_cfg (unsigned char **, CFG *);
  536: void get_mbg_tgps (unsigned char **, T_GPS *);
  537: void get_mbg_tm (unsigned char **, TM *);
  538: void get_mbg_ttm (unsigned char **, TTM *);
  539: void get_mbg_synth (unsigned char **, SYNTH *);
  540: void get_mbg_tzdl (unsigned char **, TZDL *);
  541: void get_mbg_antinfo (unsigned char **, ANT_INFO *);
  542: void get_mbg_cfgh (unsigned char **, CFGH *);
  543: void get_mbg_utc (unsigned char **, UTC *);
  544: void get_mbg_lla (unsigned char **, LLA);
  545: void get_mbg_xyz (unsigned char **, XYZ);
  546: void get_mbg_portparam (unsigned char **, PORT_PARM *);
  547: void get_mbg_eph (unsigned char **, EPH *);
  548: void get_mbg_alm (unsigned char **, ALM *);
  549: void get_mbg_iono (unsigned char **, IONO *);
  550: 
  551: unsigned long mbg_csum (unsigned char *, unsigned int);
  552: 
  553: #endif
  554: /*
  555:  * History:
  556:  *
  557:  * mbg_gps166.h,v
  558:  * Revision 4.7  2006/06/22 18:41:43  kardel
  559:  * clean up signedness (gcc 4)
  560:  *
  561:  * Revision 4.6  2005/10/07 22:11:56  kardel
  562:  * bounded buffer implementation
  563:  *
  564:  * Revision 4.5.2.1  2005/09/25 10:23:48  kardel
  565:  * support bounded buffers
  566:  *
  567:  * Revision 4.5  2005/06/25 10:58:45  kardel
  568:  * add missing log keywords
  569:  *
  570:  * Revision 4.1  1998/06/12 15:07:30  kardel
  571:  * fixed prototyping
  572:  *
  573:  * Revision 4.0  1998/04/10 19:50:42  kardel
  574:  * Start 4.0 release version numbering
  575:  *
  576:  * Revision 1.1  1998/04/10 19:27:34  kardel
  577:  * initial NTP VERSION 4 integration of PARSE with GPS166 binary support
  578:  *
  579:  * Revision 1.1  1997/10/06 20:55:38  kardel
  580:  * new parse structure
  581:  *
  582:  */

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