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elem_out.cpp
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/* elem_out.cpp: formatting elements into human-friendly form
Copyright (C) 2010, Project Pluto
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#define __STDC_FORMAT_MACROS
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <time.h>
#include <assert.h>
#include <ctype.h>
#include <stdbool.h>
#include <sys/stat.h>
#include "watdefs.h"
#include "comets.h"
#include "mpc_obs.h"
#include "mpc_func.h"
#include "date.h"
#include "afuncs.h"
#include "lunar.h"
#include "monte0.h" /* for put_double_in_buff() proto */
#include "showelem.h"
#include "stringex.h"
#include "constant.h"
#ifndef _WIN32
#include <fcntl.h>
#include <unistd.h>
bool findorb_already_running = false;
#endif
/* Pretty much every platform I've run into supports */
/* Unicode display, except OpenWATCOM and early */
/* versions of MSVC. */
#if !defined( __WATCOMC__)
#if !defined( _MSC_VER) || (_MSC_VER > 1100)
#define HAVE_UNICODE
#endif
#endif
static const char *_extras_filename = "hints.txt";
extern int available_sigmas;
extern double optical_albedo;
#ifdef NOT_CURRENTLY_IN_USE
#define ssnprintf_append( obuff, ...) snprintf_append( obuff, sizeof( obuff), __VA_ARGS__)
#define ssnprintf( obuff, ...) snprintf( obuff, sizeof( obuff), __VA_ARGS__)
#endif
int store_defaults( const ephem_option_t ephemeris_output_options,
const int element_format, const int element_precision,
const double max_residual_for_filtering,
const double noise_in_arcseconds); /* elem_out.cpp */
int get_defaults( ephem_option_t *ephemeris_output_options, int *element_format,
int *element_precision, double *max_residual_for_filtering,
double *noise_in_arcseconds); /* elem_out.cpp */
int64_t nanoseconds_since_1970( void); /* mpc_obs.c */
static int elements_in_mpcorb_format( char *buff, const char *packed_desig,
const char *full_desig, const ELEMENTS *elem,
const OBSERVE FAR *obs, const int n_obs); /* orb_func.c */
static int elements_in_guide_format( char *buff, const ELEMENTS *elem,
const char *obj_name, const OBSERVE *obs,
const unsigned n_obs); /* orb_func.c */
FILE *open_json_file( char *filename, const char *env_ptr, const char *default_name,
const char *packed_desig, const char *permits); /* ephem0.cpp */
int find_worst_observation( const OBSERVE FAR *obs, const int n_obs);
double initial_orbit( OBSERVE FAR *obs, int n_obs, double *orbit);
int set_locs( const double *orbit, double t0, OBSERVE FAR *obs, int n_obs);
int text_search_and_replace( char FAR *str, const char *oldstr,
const char *newstr); /* ephem0.cpp */
void attempt_extensions( OBSERVE *obs, const int n_obs, double *orbit,
const double epoch); /* orb_func.cpp */
double calc_obs_magnitude( const double obj_sun,
const double obj_earth, const double earth_sun, double *phase_ang);
int find_best_fit_planet( const double jd, const double *ivect,
double *rel_vect); /* runge.cpp */
void find_relative_state_vect( const double jd, const double *ivect,
double *ovect, const int ref_planet); /* runge.cpp */
const char *get_environment_ptr( const char *env_ptr); /* mpc_obs.cpp */
void remove_trailing_cr_lf( char *buff); /* ephem0.cpp */
int write_tle_from_vector( char *buff, const double *state_vect,
const double epoch, const char *norad_desig, const char *intl_desig);
int setup_planet_elem( ELEMENTS *elem, const int planet_idx,
const double t_cen); /* moid4.c */
void set_environment_ptr( const char *env_ptr, const char *new_value);
double find_collision_time( ELEMENTS *elem, double *latlon, const int is_impact);
char *fgets_trimmed( char *buff, size_t max_bytes, FILE *ifile); /*elem_out.c*/
int get_idx1_and_idx2( const int n_obs, const OBSERVE FAR *obs,
int *idx1, int *idx2); /* elem_out.c */
double mag_band_shift( const char mag_band, int *err_code); /* elem_out.c */
int get_jpl_ephemeris_info( int *de_version, double *jd_start, double *jd_end);
double *get_asteroid_mass( const int astnum); /* bc405.cpp */
double current_jd( void); /* elem_out.cpp */
double centralize_ang( double ang); /* elem_out.cpp */
char *get_file_name( char *filename, const char *template_file_name);
void get_relative_vector( const double jd, const double *ivect,
double *relative_vect, const int planet_orbiting); /* orb_func.c */
void push_orbit( const double epoch, const double *orbit); /* orb_fun2.c */
int pop_orbit( double *epoch, double *orbit); /* orb_fun2.c */
double get_planet_mass( const int planet_idx); /* orb_func.c */
double observation_rms( const OBSERVE FAR *obs); /* elem_out.cpp */
double find_epoch_shown( const OBSERVE *obs, const int n_obs); /* elem_out */
double evaluate_initial_orbit( const OBSERVE FAR *obs, /* orb_func.c */
const int n_obs, const double *orbit);
double diameter_from_abs_mag( const double abs_mag, /* ephem0.cpp */
const double optical_albedo);
char **load_file_into_memory( const char *filename, size_t *n_lines,
const bool fail_if_not_found); /* mpc_obs.cpp */
const char *get_find_orb_text( const int index); /* elem_out.cpp */
int set_language( const int language); /* elem_out.cpp */
void get_find_orb_text_filename( char *filename); /* elem_out.cpp */
FILE *fopen_ext( const char *filename, const char *permits); /* miscell.cpp */
static int names_compare( const char *name1, const char *name2);
static int get_uncertainty( const char *key, char *obuff, const bool in_km);
char *iso_time( char *buff, const double jd, const int precision); /* elem_out.cpp */
int compute_canned_object_state_vect( double *loc, const char *mpc_code,
const double jd); /* elem_out.cpp */
char *real_packed_desig( char *obuff, const char *packed_id); /* ephem0.cpp */
extern int debug_level;
double asteroid_magnitude_slope_param = .15;
double comet_magnitude_slope_param = 10.;
char default_comet_magnitude_type = 'N';
const char *mpc_fmt_filename = "mpc_fmt.txt";
const char *sof_filename = "sof.txt";
const char *sofv_filename = "sofv.txt";
int force_model = 0;
extern int forced_central_body;
int get_planet_posn_vel( const double jd, const int planet_no,
double *posn, double *vel); /* runge.cpp */
void compute_variant_orbit( double *variant, const double *ref_orbit,
const double n_sigmas); /* orb_func.cpp */
char *make_config_dir_name( char *oname, const char *iname); /* miscell.cpp */
int get_residual_data( const OBSERVE *obs, double *xresid, double *yresid);
int put_elements_into_sof( char *obuff, const char *templat,
const ELEMENTS *elem, const double *nongravs,
const int n_obs, const OBSERVE *obs); /* elem_ou2.cpp */
uint64_t parse_bit_string( const char *istr); /* miscell.cpp */
const char *write_bit_string( char *ibuff, const uint64_t bits);
double generate_mc_variant_from_covariance( double *var_orbit,
const double *orbit); /* orb_func.c */
void rotate_state_vector_to_current_frame( double *state_vect,
const double epoch_shown, const int planet_orbiting,
char *body_frame_note); /* elem_out.cpp */
int debug_printf( const char *format, ...) /* mpc_obs.cpp */
#ifdef __GNUC__
__attribute__ (( format( printf, 1, 2)))
#endif
;
/* Old MSVCs and OpenWATCOM lack erf() and many other math functions: */
#if defined( _MSC_VER) && (_MSC_VER < 1800) || defined( __WATCOMC__)
double erf( double x); /* orb_fun2.cpp */
#endif
bool is_inverse_square_force_model( void)
{
return( (force_model & 0x10) != 0);
}
char *fgets_trimmed( char *buff, size_t max_bytes, FILE *ifile)
{
char *rval = fgets( buff, (int)max_bytes, ifile);
if( rval)
{
int i;
for( i = 0; buff[i] && buff[i] != 10 && buff[i] != 13; i++)
;
buff[i] = '\0';
}
return( rval);
}
void get_first_and_last_included_obs( const OBSERVE *obs,
const int n_obs, int *first, int *last) /* elem_out.c */
{
if( first)
for( *first = 0; *first < n_obs - 1 && !obs[*first].is_included;
(*first)++)
;
if( last)
for( *last = n_obs - 1; *last && !obs[*last].is_included; (*last)--)
;
}
void make_observatory_info_text( char *text, const size_t textlen,
const OBSERVE *obs, int n_obs, const char *mpc_code)
{
double jd_start = 0., jd_end = 0.;
int n_found = 0, n_used = 0;
char date_text[80], time_text[80];
while( n_obs--)
{
if( !strcmp( obs->mpc_code, mpc_code))
{
if( !jd_start)
jd_start = obs->jd;
jd_end = obs->jd;
n_found++;
if( obs->is_included)
n_used++;
}
obs++;
}
assert( n_found);
snprintf_err( text, textlen, "%d observations from (%s)", n_found, mpc_code);
if( n_used == n_found)
strlcat_err( text, "\n", textlen);
else
snprintf_append( text, textlen, "; %d used\n", n_used);
full_ctime( date_text, jd_start, CALENDAR_JULIAN_GREGORIAN
| FULL_CTIME_YMD | FULL_CTIME_LEADING_ZEROES | FULL_CTIME_MICRODAYS);
full_ctime( time_text, jd_start, FULL_CTIME_TIME_ONLY);
snprintf_append( text, textlen, "First %s = %s\n", date_text, time_text);
full_ctime( date_text, jd_end, CALENDAR_JULIAN_GREGORIAN
| FULL_CTIME_YMD | FULL_CTIME_LEADING_ZEROES | FULL_CTIME_MICRODAYS);
full_ctime( time_text, jd_end, FULL_CTIME_TIME_ONLY);
snprintf_append( text, textlen, "Last %s = %s", date_text, time_text);
}
void make_date_range_text( char *obuff, const double jd1, const double jd2)
{
long year, year2;
int month, month2;
const int day1 = (int)decimal_day_to_dmy( jd1, &year, &month,
CALENDAR_JULIAN_GREGORIAN);
const int day2 = (int)decimal_day_to_dmy( jd2, &year2, &month2,
CALENDAR_JULIAN_GREGORIAN);
static const char *month_names[] = { "Jan.", "Feb.", "Mar.", "Apr.", "May",
"June", "July", "Aug.", "Sept.", "Oct.", "Nov.", "Dec." };
const size_t obuff_size = 37;
const double dt = jd2 - jd1;
if( year == year2)
{
snprintf_err( obuff, obuff_size, "%ld %s %d", year, month_names[month - 1], day1);
obuff += strlen( obuff);
if( month == month2 && day1 != day2)
snprintf_err( obuff, obuff_size, "-%d", day2);
else if( month != month2)
snprintf_err( obuff, obuff_size, "-%s %d", month_names[month2 - 1], day2);
}
else /* different years */
snprintf_err( obuff, obuff_size, "%ld %s %d-%ld %s %d", year, month_names[month - 1],
day1, year2, month_names[month2 - 1], day2);
if( dt < 10. / seconds_per_day) /* less than 10 seconds: show to .01 sec */
snprintf_append( obuff, obuff_size, " (%.2f sec)", dt * seconds_per_day);
else if( dt < 100. / seconds_per_day) /* less than 100 seconds: show to .1 sec */
snprintf_append( obuff, obuff_size, " (%.1f sec)", dt * seconds_per_day);
else if( dt < 100. / minutes_per_day) /* less than 100 minutes: show in min */
snprintf_append( obuff, obuff_size, " (%.1f min)", dt * minutes_per_day);
else if( dt < 2.)
snprintf_append( obuff, obuff_size, " (%.1f hr)", dt * hours_per_day);
}
/* This is useful for abbreviating on-screen text; say, displaying */
/* all planet names chopped down to four characters. With UTF-8 text, */
/* this may not mean four bytes. */
const char *find_nth_utf8_char( const char *itext, size_t n)
{
while( *itext && n--)
{
switch( ((unsigned char)*itext) >> 4)
{
case 0xf: /* four-byte token; U+10000 to U+1FFFFF */
itext += 4;
break;
case 0xe: /* three-byte token; U+0800 to U+FFFF */
itext += 3;
break;
case 0xc: /* two-byte token: U+0080 to U+03FF */
case 0xd: /* two-byte token: U+0400 to U+07FF */
itext += 2;
break;
default: /* "ordinary" ASCII (U+0 to U+7F) */
itext++; /* single-byte token */
break;
}
}
return( itext);
}
/* String file name defaults to English, but can be replaced */
/* with ifindorb.txt (Italian), ffindorb.txt (French), etc. */
char findorb_language = 'e';
void get_find_orb_text_filename( char *filename)
{
strcpy( filename, "efindorb.txt");
*filename = findorb_language;
}
/* Multi-line text in ?findorb.txt files is 'joined' by this function.
If two or more consecutive lines have the same index, we concatenate
them, with a line feed in between them. */
static void collapse_findorb_txt( char **text)
{
size_t i, j;
for( i = 0; text[i]; i++)
{
text_search_and_replace( text[i], "\\n", "\n");
text_search_and_replace( text[i], "[email]", "pluto@p");
}
for( i = 0; text[i]; i++)
{
const int idx = atoi( text[i]);
if( text[i + 1] && idx && idx == atoi( text[i + 1]))
{
strcat( text[i], "\n");
memmove( text[i] + strlen( text[i]), text[i + 1] + 8,
strlen( text[i + 1] + 7));
for( j = i + 1; text[j + 1]; j++)
text[j] = text[j + 1];
text[j] = NULL;
i--; /* may be more lines to concatenate */
}
}
}
const char *get_find_orb_text( const int index)
{
static char **text = NULL, **default_text = NULL;
size_t i;
static char currently_loaded_language = '\0';
char filename[20];
if( !index) /* clean up */
{
if( text)
free( text);
if( default_text)
free( default_text);
default_text = text = NULL;
return( NULL);
}
get_find_orb_text_filename( filename);
if( findorb_language != 'e' &&
currently_loaded_language != findorb_language)
{
if( text) /* 'text' = pointer to strings for current language */
free( text);
text = load_file_into_memory( filename, NULL, true);
collapse_findorb_txt( text);
currently_loaded_language = findorb_language;
}
if( !default_text) /* 'default_text' = strings for English, and as */
{ /* a backstop when something isn't translated */
*filename = 'e';
default_text = load_file_into_memory( filename, NULL, true);
collapse_findorb_txt( default_text);
}
if( text && findorb_language != 'e') /* try non-default language... */
{
for( i = 0; text[i]; i++)
if( atoi( text[i]) == index)
return( text[i] + 8);
} /* ...if that fails, search strings for English : */
for( i = 0; default_text[i]; i++)
if( atoi( default_text[i]) == index)
return( default_text[i] + 8);
assert( 1); /* i.e., should never get here */
return( NULL);
}
/* observation_summary_data( ) produces the final line in an MPC report,
such as 'From 20 observations 1997 Oct. 20-22; mean residual 0".257. '
Note that the arcsecond mark comes before the decimal point; this
oddity is handled using the text_search_and_replace() function.
*/
static void observation_summary_data( char *obuff, const OBSERVE FAR *obs,
const int n_obs, const int options)
{
int i, n_included, first_idx, last_idx;
get_first_and_last_included_obs( obs, n_obs, &first_idx, &last_idx);
for( i = n_included = 0; i < n_obs; i++)
n_included += obs[i].is_included;
if( options == -1) /* 'guide.txt' bare-bones format */
sprintf( obuff, "%d of %d", n_included, n_obs);
else if( (options & ELEM_OUT_ALTERNATIVE_FORMAT) && n_included != n_obs)
sprintf( obuff, get_find_orb_text( 15), n_included, n_obs);
else
sprintf( obuff, get_find_orb_text( 16), n_included);
if( options != -1 && n_included)
{
const double rms = (options & ELEM_OUT_NORMALIZED_MEAN_RESID) ?
compute_weighted_rms( obs, n_obs, NULL) :
compute_rms( obs, n_obs);
char rms_buff[24];
const char *rms_format = "%.2f";
strcat( obuff, " ");
obuff += strlen( obuff);
make_date_range_text( obuff, obs[first_idx].jd, obs[last_idx].jd);
obuff += strlen( obuff);
if( options & ELEM_OUT_PRECISE_MEAN_RESIDS)
rms_format = (rms > 0.003 ? "%.3f" : "%.1e");
snprintf_err( rms_buff, sizeof( rms_buff), rms_format, rms);
if( options & ELEM_OUT_NORMALIZED_MEAN_RESID)
strlcat_err( rms_buff, " sigmas", sizeof( rms_buff));
else
text_search_and_replace( rms_buff, ".", "\".");
sprintf( obuff, get_find_orb_text( 17), rms_buff);
} /* "; mean residual %s." */
}
double centralize_ang( double ang)
{
ang = fmod( ang, PI + PI);
if( ang < 0.)
ang += PI + PI;
return( ang);
}
void convert_elements( const double epoch_from, const double epoch_to,
double *incl, double *asc_node, double *arg_per); /* conv_ele.cpp */
/* Packed MPC designations have leading and/or trailing spaces. This */
/* function lets you get the designation minus those spaces. */
static void packed_desig_minus_spaces( char *obuff, const char *ibuff)
{
while( *ibuff && *ibuff == ' ')
ibuff++;
while( *ibuff && *ibuff != ' ')
*obuff++ = *ibuff++;
*obuff = '\0';
}
double current_jd( void)
{
static const double jan_1970 = 2440587.5;
const double jd = jan_1970 +
(double)nanoseconds_since_1970( ) * 1e-9 / seconds_per_day;
return( jd);
}
/* For some time, I only had second-hand info on MPC's definition of
an 'opposition'. It sounded as if their definition was that 17 half-months
had elapsed between consecutive observations, with the length varying
depending on the weirdnesses of the Gregorian calendar.
I ignored calendrical issues and just took it to be 237 days, since
that's a prime number and is "close enough". Margaret Pan at MPC tells me
the actual definition is :
-- If the arc is less than 238 days, it's one opposition.
-- If it's greater than that, the times of solar conjunction are computed.
If there are observations between consecutive conjunctions, that's an
opposition at which the object was observed. She notes that "for earth
co-orbital objects, this can sometimes depend on the resolution of the
conjunction computation and the range of elongations allowed."
I don't expect to implement this scheme soon. Thus far, all I've
done is to change my 237-day span to 238 days. The result is usually
fairly close to the MPC value. */
const double opposition_time = 238.;
bool opposition_break( const OBSERVE *obs)
{
return( obs[1].jd - obs[0].jd > opposition_time);
}
static int _n_oppositions( const OBSERVE *obs, const int n)
{
int i, j, rval = 1;
for( i = j = 0; i < n; i++)
if( obs[i].jd - obs[j].jd > opposition_time)
{
rval++;
j = i;
}
return( rval);
}
int n_clones_accepted = 0;
static int elements_in_mpcorb_format( char *buff, const char *packed_desig,
const char *full_desig, const ELEMENTS *elem,
const OBSERVE FAR *obs, const int n_obs) /* orb_func.c */
{
extern unsigned perturbers;
int month, day, i, first_idx, last_idx, n_included_obs = 0;
long year;
const double rms_err = compute_rms( obs, n_obs);
const unsigned hex_flags = 0;
/* 'mpcorb' has four hexadecimal flags starting in column 162, */
/* signifying if the object is in any of various classes such */
/* as Aten, scattered-disk object, PHA, Jupiter Trojan, */
/* etc. None of those flags are set yet. */
const int n_oppositions = 1;
/* The above needs some work. Problem is, what constitutes */
/* an "opposition" for an NEO? (It's more clearcut for MBOs.) */
/* For the nonce, we'll just say "one opposition". */
double arc_length;
char packed_desig2[40];
packed_desig_minus_spaces( packed_desig2, packed_desig);
sprintf( buff, "%-8s%5.2f %4.2f ", packed_desig2, elem->abs_mag,
asteroid_magnitude_slope_param);
day = (int)( decimal_day_to_dmy( elem->epoch, &year,
&month, CALENDAR_JULIAN_GREGORIAN) + .0001);
sprintf( buff + 20, "%c%02ld%X%c",
int_to_mutant_hex_char( year / 100),
year % 100L, month,
int_to_mutant_hex_char( day));
sprintf( buff + 25, "%10.5f%11.5f%11.5f%11.5f%11.7f",
centralize_ang( elem->mean_anomaly) * 180. / PI,
centralize_ang( elem->arg_per) * 180. / PI,
centralize_ang( elem->asc_node) * 180. / PI,
centralize_ang( elem->incl) * 180. / PI,
elem->ecc);
sprintf( buff + 79, "%12.8f%12.7f",
(180 / PI) / elem->t0, /* n */
elem->major_axis);
for( i = 0; i < n_obs; i++)
if( obs[i].is_included)
n_included_obs++;
day = (int)( decimal_day_to_dmy( current_jd( ),
&year, &month, CALENDAR_JULIAN_GREGORIAN) + .0001);
sprintf( buff + 103,
" FO %02d%02d%02d %4d %2d ****-**** **** Find_Orb %04x",
(int)( year % 100), month, (int)day,
n_included_obs, n_oppositions, hex_flags);
get_first_and_last_included_obs( obs, n_obs, &first_idx, &last_idx);
arc_length = obs[last_idx].jd - obs[first_idx].jd;
if( arc_length < 99. / seconds_per_day)
sprintf( buff + 127, "%4.1f sec ", arc_length * seconds_per_day);
else if( arc_length < 99. / minutes_per_day)
sprintf( buff + 127, "%4.1f min ", arc_length * minutes_per_day);
else if( arc_length < 2.)
sprintf( buff + 127, "%4.1f hrs ", arc_length * hours_per_day);
else if( arc_length < 600.)
sprintf( buff + 127, "%4d days", (int)arc_length + 1);
else
sprintf( buff + 127, "%4d-%4d",
(int)JD_TO_YEAR( obs[first_idx].jd),
(int)JD_TO_YEAR( obs[last_idx].jd));
buff[136] = ' ';
sprintf( buff + 165, " %-30s", full_desig);
day = (int)( decimal_day_to_dmy( obs[last_idx].jd, &year,
&month, CALENDAR_JULIAN_GREGORIAN) + .0001);
sprintf( buff + 194, "%04ld%02d%02d", year, month, day);
if( rms_err < 9.9)
sprintf( buff + 137, "%4.2f", rms_err);
else if( rms_err < 99.9)
sprintf( buff + 137, "%4.1f", rms_err);
else if( rms_err < 9999.)
sprintf( buff + 137, "%4.0f", rms_err);
buff[141] = ' ';
if( (perturbers & 0x1fe) == 0x1fe)
{ /* we have Mercury through Neptune, at least */
const char *coarse_perturb, *precise_perturb;
if( perturbers & 0x700000) /* asteroids included */
{
precise_perturb = (perturbers & 0x400 ? "3E" : "38");
coarse_perturb = "M-v";
}
else /* non-asteroid case */
{
precise_perturb = (perturbers & 0x400 ? "06" : "00");
coarse_perturb = (perturbers & 0x200 ? "M-P" : "M-N");
}
memcpy( buff + 142, coarse_perturb, 3);
memcpy( buff + 146, precise_perturb, 2);
}
return( 0);
}
char *iso_time( char *buff, const double jd, const int precision)
{
full_ctime( buff, jd, CALENDAR_JULIAN_GREGORIAN
| FULL_CTIME_YMD | FULL_CTIME_MONTHS_AS_DIGITS
| FULL_CTIME_LEADING_ZEROES | (precision << 4));
buff[4] = buff[7] = '-';
buff[10] = 'T';
strcat( buff, "Z");
return( buff);
}
static int _unpack_desig_for_linkage( const char *packed_id, char *reduced)
{
size_t i = 0;
strlcpy_err( reduced, packed_id, 13);
while( i < 12 && reduced[i] != ' ')
i++;
if( i == 12) /* both permanent and provisional desigs; */
memset( reduced + 5, ' ', 7); /* just use the permanent one */
return( unpack_mpc_desig( NULL, reduced));
}
double utc_from_td( const double jdt, double *delta_t); /* ephem0.cpp */
/* This is ludicrously high, but let's say that we'll never
report a linkage between 50 or more tracklets at once. */
#define MAX_LINKAGE_IDS 50
static int make_linkage_json( const int n_obs, const OBSERVE *obs, const ELEMENTS *elem)
{
int i, j, n_ids = 0, idx[MAX_LINKAGE_IDS], n_designated = 0;
FILE *ofile, *ifile;
char buff[200], packed_id2[13];
for( i = 0; i < n_obs && n_ids < MAX_LINKAGE_IDS; i++)
if( !i || strcmp( obs[i].packed_id, obs[i - 1].packed_id))
{
const int desig_type = _unpack_desig_for_linkage( obs[i].packed_id, packed_id2);
for( j = 0; j < n_ids; j++)
{
char packed_id[13];
_unpack_desig_for_linkage( obs[idx[j]].packed_id, packed_id);
if( !strcmp( packed_id, packed_id2))
break;
}
if( j == n_ids)
{
if( desig_type != OBJ_DESIG_OTHER && desig_type != OBJ_DESIG_ARTSAT)
n_designated++;
idx[n_ids++] = i;
}
}
if( n_ids < 2 || n_ids >= MAX_LINKAGE_IDS)
if( elem->central_obj != 3)
return( n_ids); /* no ID to be made */
ifile = fopen_ext( "link_hdr.json", "cr");
if( !ifile) /* no user-modified header; fall back to default hdr */
ifile = fopen_ext( "link_def.json", "fcr");
ofile = fopen_ext( (elem->central_obj == 3) ? "artsat.json" : "linkage.json", "fcw");
while( fgets( buff, sizeof( buff), ifile))
if( *buff != '#')
{
char *tptr = strstr( buff, "%t");
char tbuff[200];
if( tptr)
{
full_ctime( tbuff, current_jd( ), FULL_CTIME_YMD);
text_search_and_replace( buff, "%t", tbuff);
}
tptr = strstr( buff, "%v");
if( tptr)
text_search_and_replace( buff, "%v", find_orb_version_jd( NULL));
if( elem->central_obj == 3)
text_search_and_replace( buff, "\"comment\": \"",
"\"comment\": \"Identified as artsat. ");
fputs( buff, ofile);
}
fclose( ifile);
if( elem->central_obj == 3)
fprintf( ofile, " \"designations\": [\n"
" \"ARTSAT\"\n"
" ],\n");
if( n_designated)
{
fprintf( ofile, " \"designations\": [\n");
for( i = j = 0; i < n_ids; i++)
{
const int desig_type = _unpack_desig_for_linkage( obs[idx[i]].packed_id, packed_id2);
if( desig_type != OBJ_DESIG_OTHER && desig_type != OBJ_DESIG_ARTSAT)
{
strlcpy_error( buff, packed_id2);
text_search_and_replace( buff, " ", "");
j++;
fprintf( ofile, " \"%s\"%s\n", buff, (j == n_designated ? "" : ","));
}
}
if( n_ids == n_designated)
fprintf( ofile, " ]\n");
else
fprintf( ofile, " ],\n");
}
if( n_ids != n_designated)
{
fprintf( ofile, " \"trksubs\": [\n");
for( i = j = 0; i < n_ids; i++)
{
const int desig_type = _unpack_desig_for_linkage( obs[idx[i]].packed_id, packed_id2);
if( desig_type == OBJ_DESIG_OTHER || desig_type == OBJ_DESIG_ARTSAT)
{
const double obs_utc_jd = utc_from_td( obs[idx[i]].jd, NULL);
strlcpy_error( buff, packed_id2);
text_search_and_replace( buff, " ", "");
j++;
fprintf( ofile, " [\n");
fprintf( ofile, " \"%s\",\n", buff);
full_ctime( buff, obs_utc_jd, FULL_CTIME_YMD | FULL_CTIME_LEADING_ZEROES
| FULL_CTIME_MONTHS_AS_DIGITS
| FULL_CTIME_FORMAT_DAY | FULL_CTIME_5_PLACES);
fprintf( ofile, " \"%s\",\n", buff);
fprintf( ofile, " \"%s\"\n", obs[idx[i]].mpc_code);
fprintf( ofile, " ]%s\n", (j == n_ids - n_designated ? "" : ","));
}
}
fprintf( ofile, " ]");
}
i = 0;
while( i < n_obs && strcmp( obs[i].reference, "NEOCP"))
i++;
if( i < n_obs) /* no NEOCP observations */
{
fprintf( ofile, ",\n");
fprintf( ofile, " \"identification_type\": \"neocp\"");
}
if( elem->central_obj != 3)
{
fprintf( ofile, ",\n");
fprintf( ofile, " \"orbit\": {\n");
fprintf( ofile, " \"arg_pericenter\": %f,\n",
centralize_ang( elem->arg_per) * 180. / PI);
fprintf( ofile, " \"eccentricity\": %.8f,\n", elem->ecc);
fprintf( ofile, " \"epoch\": %f,\n", elem->epoch);
fprintf( ofile, " \"inclination\": %f,\n", elem->incl * 180. / PI);
fprintf( ofile, " \"lon_asc_node\": %f,\n",
centralize_ang( elem->asc_node) * 180. / PI);
fprintf( ofile, " \"pericenter_distance\": %.15f,\n", elem->q);
fprintf( ofile, " \"pericenter_time\": %f\n", elem->perih_time);
fprintf( ofile, " }");
}
fprintf( ofile, "\n }\n }\n}\n");
fclose( ofile);
return( n_ids);
}
/* _Usually_, you can tell what type of object you have from the
length of the packed designation, and from that, what the alignment
within the first twelve bytes of a punched-card record should be.
The only exception I know of is cases where somebody uses a five-byte
temporary identifier; that can't be distinguished from a numbered
minor planet or comet so easily. It may not really be a problem
for us, though it's probably an issue for MPC. */
static inline void align_packed_desig( char *obuff, const char *packed_desig)
{
int loc;
const size_t len = strlen( packed_desig);
assert( len > 0 && len < 13);
if( len == 8) /* mostly comet desigs */
loc = 4;
else if( len == 5) /* mostly permanent desigs */
loc = 0;
else if( len > 8) /* artsat, "overlong" non-standard desigs */
loc = 0;
else /* short, usually temporary desigs */
loc = 5;
memset( obuff, ' ', 12);
memcpy( obuff + loc, packed_desig, strlen( packed_desig));
obuff[12] = '\0';
}
char *find_numbered_mp_info( const int number); /* mpc_obs.cpp */
static char *object_name( char *buff, const int obj_index)
{
if( !obj_index)
strcpy( buff, "Sun");
else if( obj_index > 0 && obj_index < 11) /* nine planets & moon */
strcpy( buff, get_find_orb_text( 99107 + obj_index));
else
sprintf( buff, "Object_%d\n", obj_index);
return( buff);
}
double vect3_squared( const double *v)
{
return( v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
}
int geo_score( const double *orbit, const double epoch)
{
extern unsigned n_sr_orbits;
unsigned i, n_geo, n_orbits;
const double gm = get_planet_mass( 3);
extern int n_orbit_params;
if( n_orbit_params > 6) /* don't bother with a geo score for objects */
return( -1); /* so well-determined that we have non-gravs */
if( available_sigmas == COVARIANCE_AVAILABLE)
n_orbits = 100;
else if( available_sigmas == SR_SIGMAS_AVAILABLE)
n_orbits = n_sr_orbits;
else
return( -1);
for( i = n_geo = 0; i < n_orbits; i++)
{
double variant_orbit[MAX_N_PARAMS], earth_centric_orbit[MAX_N_PARAMS];
double r, vel_squared;
extern double *sr_orbits;
if( available_sigmas == COVARIANCE_AVAILABLE)
generate_mc_variant_from_covariance( variant_orbit, orbit);
else if( available_sigmas == SR_SIGMAS_AVAILABLE)
memcpy( variant_orbit, sr_orbits + 6 * i, 6 * sizeof( double));
find_relative_state_vect( epoch, variant_orbit, earth_centric_orbit, 3);
r = vector3_length( earth_centric_orbit);
vel_squared = vect3_squared( earth_centric_orbit + 3);
if( vel_squared < gm / r)
n_geo++;
}
return( n_geo * 100 / n_orbits);
}
static int elements_in_json_format( FILE *ofile, const ELEMENTS *elem,
const double *orbit,
const char *obj_name, const OBSERVE *obs,
const unsigned n_obs, const double *moids,
const char *body_frame_note, const bool show_obs,
const int geocentric_score)
{
extern int n_orbit_params;
double jd = current_jd( );
double jd_first, jd_last;
double q_sigma = 0., weighted_rms;
char buff[180];
int first, last, i, n_used;
extern const char *combine_all_observations;
const char *packed_id;
extern double uncertainty_parameter;
const char *reference = get_environment_ptr( "REFERENCE");
if( combine_all_observations && *combine_all_observations)
{
char aligned_desig[13];
obj_name = buff;
packed_id = combine_all_observations;
align_packed_desig( aligned_desig, packed_id);
get_object_name( buff, aligned_desig);
}
else
packed_id = obs->packed_id;
fprintf( ofile, "{\n \"num\": 1,\n");
fprintf( ofile, " \"ids\":\n [\n \"%s\"\n", obj_name);
fprintf( ofile, " ],\n");
fprintf( ofile, " \"objects\":\n {\n");
fprintf( ofile, " \"%s\":\n", obj_name);
fprintf( ofile, " {\n \"object\": \"%s\",\n", obj_name);
if( *obj_name == '(') /* numbered obj */
{
const char *text = find_numbered_mp_info( atoi( obj_name + 1));
if( text && *text)
{
for( i = 5; i >= 0; i--)
{
const char *fields[] = { "name", "prov_desig", "disc_date", "disc_site",
"disc_ref", "discover" };
const int offsets[] = { 9, 29, 41, 53, 72, 78 };
char *tptr = (char *)find_nth_utf8_char( text, offsets[i]);
remove_trailing_cr_lf( tptr);
if( *tptr && *tptr != ' ')
fprintf( ofile, " \"%s\": \"%s\",\n", fields[i], tptr);
*tptr = '\0';
}
}
}
fprintf( ofile, " \"packed\": \"%s\",\n",
real_packed_desig( buff, packed_id));
fprintf( ofile, " \"created\": %.5f,\n", jd);
fprintf( ofile, " \"created iso\": \"%s\",\n", iso_time( buff, jd, 0));
find_orb_version_jd( &jd);
fprintf( ofile, " \"Find_Orb_version\": %.5f,\n", jd);
fprintf( ofile, " \"Find_Orb_version_iso\": \"%s\",\n", iso_time( buff, jd, 0));
fprintf( ofile, " \"elements\":\n {\n");
fprintf( ofile, " \"central body\": \"%s\",\n", object_name( buff, elem->central_obj));
strlcpy_error( buff, body_frame_note + 1);
i = (int)strlen( buff);
buff[i - 1] = '\0'; /* strip trailing paren */
fprintf( ofile, " \"frame\": \"%s\",\n", buff);
if( *reference)
fprintf( ofile, " \"reference\": \"%s\",\n", reference);
fprintf( ofile, " \"epoch_iso\": \"%s\",\n", iso_time( buff, elem->epoch, 0));
fprintf( ofile, " \"epoch\": %17.8f,", elem->epoch);
if( elem->ecc < 1.)
{
fprintf( ofile, "\n \"P\": %17.13f,", 2. * PI * elem->t0);
if( !get_uncertainty( "sigma_P:", buff, 0))
fprintf( ofile, " \"P sigma\": %s,", buff);
fprintf( ofile, "\n \"M\": %17.13f,",
centralize_ang( elem->mean_anomaly) * 180. / PI);
if( !get_uncertainty( "sigma_M", buff, 0))
fprintf( ofile, " \"M sigma\": %s,", buff);
}
fprintf( ofile, "\n \"n\": %17.13f,", (180 / PI) / elem->t0);
if( !get_uncertainty( "sigma_n:", buff, 0))
fprintf( ofile, " \"n sigma\": %s,", buff);
fprintf( ofile, "\n \"a\": %17.13f,", elem->major_axis);
if( !get_uncertainty( "sigma_a:", buff, 0))
fprintf( ofile, " \"a sigma\": %s,", buff);
fprintf( ofile, "\n \"e\": %17.13f,", elem->ecc);
if( !get_uncertainty( "sigma_e", buff, 0))
fprintf( ofile, " \"e sigma\": %s,", buff);
fprintf( ofile, "\n \"q\": %17.13f,", elem->q);
if( !get_uncertainty( "sigma_q", buff, 0))
{
q_sigma = atof( buff);
fprintf( ofile, " \"q sigma\": %s,", buff);
}
if( elem->ecc < 1.)
{
const double big_q = elem->q * (1. + elem->ecc) / (1. - elem->ecc);
fprintf( ofile, "\n \"Q\": %17.13f,", big_q);
if( !get_uncertainty( "sigma_Q", buff, 0))
fprintf( ofile, " \"Q sigma\": %s,", buff);
}
fprintf( ofile, "\n \"i\": %17.13f,", elem->incl * 180. / PI);
if( !get_uncertainty( "sigma_i", buff, 0))
fprintf( ofile, " \"i sigma\": %s,", buff);
fprintf( ofile, "\n \"arg_per\": %17.13f,",
centralize_ang( elem->arg_per) * 180. / PI);
if( !get_uncertainty( "sigma_omega", buff, 0))
fprintf( ofile, " \"arg_per sigma\": %s,", buff);
fprintf( ofile, "\n \"asc_node\": %17.13f,",
centralize_ang( elem->asc_node) * 180. / PI);
if( !get_uncertainty( "sigma_Omega", buff, 0))
fprintf( ofile, " \"asc_node sigma\": %s,", buff);
fprintf( ofile, "\n \"Tp\": %16.8f,", elem->perih_time);
if( !get_uncertainty( "sigma_Tp", buff, 0))
fprintf( ofile, " \"Tp sigma\": %s,", buff);
fprintf( ofile, "\n \"Tp_iso\": \"%s\",", iso_time( buff, elem->perih_time, 3));
for( i = 6; i < n_orbit_params; i++)
{
char tbuff[20];
fprintf( ofile, "\n \"A%d\": %.9g,", i - 5, orbit[i]);
snprintf( tbuff, sizeof( tbuff), "Sigma_A%d:", i - 5);
if( !get_uncertainty( tbuff, buff, 0))
fprintf( ofile, " \"sigma_A%d\": %s,", i - 5, buff);
}
if( elem->abs_mag)
{
fprintf( ofile, "\n \"H\": %6.2f,", elem->abs_mag);
if( !get_uncertainty( "sigma_H:", buff, 0))
fprintf( ofile, " \"H sigma\": %s,", buff);
fprintf( ofile, "\n \"G\": %6.2f,", elem->slope_param);
if( !get_uncertainty( "sigma_G:", buff, 0))
fprintf( ofile, " \"G sigma\": %s,", buff);
}
fprintf( ofile, "\n \"rms_residual\": %.5g,", compute_rms( obs, n_obs));
weighted_rms = compute_weighted_rms( obs, n_obs, &n_used);
fprintf( ofile, "\n \"weighted_rms_residual\": %.4f,", weighted_rms);
fprintf( ofile, "\n \"n_resids\": %d,", n_used);
if( uncertainty_parameter < 90.)
fprintf( ofile, "\n \"U\": %.4f,", uncertainty_parameter);
if( q_sigma && !elem->central_obj)
{
double neo_score = erf( (1.3 - elem->q) / q_sigma) * .5 + .5;