Open source Very Long Baseline Interferometry
OpenVLBI
vlbi.h
1/* OpenVLBI - Open Source Very Long Baseline Interferometry
2* Copyright © 2017-2022 Ilia Platone
3*
4* This program is free software; you can redistribute it and/or
5* modify it under the terms of the GNU Lesser General Public
6* License as published by the Free Software Foundation; either
7* version 3 of the License, or (at your option) any later version.
8*
9* This program is distributed in the hope that it will be useful,
10* but WITHOUT ANY WARRANTY; without even the implied warranty of
11* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12* Lesser General Public License for more details.
13*
14* You should have received a copy of the GNU Lesser General Public License
15* along with this program; if not, write to the Free Software Foundation,
16* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17*/
18
19#ifndef _VLBI_H
20#define _VLBI_H
21
22#ifdef __cplusplus
23extern "C" {
24#endif
25
26#ifdef _WIN32
27#define DLL_EXPORT __declspec(dllexport)
28#else
29#define DLL_EXPORT extern
30#endif
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <math.h>
35#include <time.h>
36#include <errno.h>
37#include <unistd.h>
38#include <string.h>
39#include <math.h>
40#include <float.h>
41#include <libgen.h>
42#include <sys/types.h>
43#include <assert.h>
44#include <pthread.h>
45#include <dsp.h>
46
281typedef struct {
285 double *Location;
287 int Geo;
291 char *Name;
293 int Index;
294} vlbi_node;
295
297typedef struct {
303 double *Target;
305 double Ra;
307 double Dec;
309 double *baseline;
311 double u;
313 double v;
315 double delay;
325 char *Name;
329
340typedef double(* vlbi_func2_t)(double, double);
341
343typedef void* vlbi_context;
344
346typedef struct timespec timespec_t;
353#ifndef Min
355#define Min(a,b) \
356 ({ __typeof (a) _a = (a); \
357 __typeof (b) _b = (b); \
358 _a < _b ? _a : _b; })
359#endif
360#ifndef Max
362#define Max(a,b) \
363 ({ __typeof (a) _a = (a); \
364 __typeof (b) _b = (b); \
365 _a > _b ? _a : _b; })
366#endif
367#ifndef Log
369#define Log(a,b) \
370( log(a) / log(b) )
371#endif
372
373#ifndef hz2rad
375#define hz2rad(hz) (2.0*PI*hz)
376#endif
377
378#ifndef sinpsin
380#define sinpsin(s1, s2) (2.0*sin((asin(s1)+asin(s2))/2.0)*cos((asin(s1)-asin(s2))/2.0))
381#endif
382
383#ifndef sinmsin
385#define sinmsin(s1, s2) (2.0*cos((asin(s1)+asin(s2))/2.0)*sin((asin(s1)-asin(s2))/2.0))
386#endif
387
388#ifndef cospcos
390#define cospcos(c1, c2) (2.0*cos((acos(s1)+acos(s2))/2.0)*cos((acos(s1)-acos(s2))/2.0))
391#endif
392
393#ifndef cosmcos
395#define cosmcos(c1, c2) (2.0*sin((acos(s1)+acos(s2))/2.0)*sin((acos(s1)-acos(s2))/2.0))
396#endif
397
398#ifndef sinxsin
400#define sinxsin(s1, s2) ((cos(asin(s1)-asin(s2))-cos(asin(s1)+asin(s2)))/2.0)
401#endif
402
403#ifndef cosxcos
405#define cosxcos(c1, c2) ((cos(acos(s1)+acos(s2))+cos(acos(s1)-acos(s2)))/2.0)
406#endif
407
408#ifndef sinxcos
410#define sinxcos(s, c) ((sin(asin(s)+acos(c))+sin(asin(s)-acos(c)))/2.0)
411#endif
412
413#ifndef sin2cos
415#define sin2cos(s) cos(asin(s))
416#endif
417
418#ifndef cos2sin
420#define cos2sin(c) sin(acos(c))
421#endif
422
423#ifndef VLBI_VERSION_STRING
425#define VLBI_VERSION_STRING "1.23.5"
426#endif
427
428#ifndef VLBI_CATALOG_PATH
430#define VLBI_CATALOG_PATH "/usr/share/OpenVLBI/cat/index.txt"
431#endif
432
433#ifndef CIRCLE_DEG
435#define CIRCLE_DEG 360.0
436#endif
437#ifndef CIRCLE_AM
439#define CIRCLE_AM (CIRCLE_DEG * 60.0)
440#endif
441#ifndef CIRCLE_AS
443#define CIRCLE_AS (CIRCLE_AM * 60.0)
444#endif
445#ifndef RAD_AS
447#define RAD_AS (CIRCLE_AS/(PI*2.0))
448#endif
449#ifndef ONE_SECOND_TICKS
451#define ONE_SECOND_TICKS 100000000
452#endif
453#ifndef ONE_MILLISECOND_TICKS
455#define ONE_MILLISECOND_TICKS 100000
456#endif
457#ifndef ONE_MICROSECOND_TICKS
459#define ONE_MICROSECOND_TICKS 100
460#endif
461#ifndef SOLAR_DAY
463#define SOLAR_DAY 86400
464#endif
465#ifndef SIDEREAL_DAY
467#define SIDEREAL_DAY 86164.0905
468#endif
469#ifndef TRACKRATE_SIDEREAL
471#define TRACKRATE_SIDEREAL (CIRCLE_AS / SIDEREAL_DAY)
472#endif
473#ifndef TRACKRATE_SOLAR
475#define TRACKRATE_SOLAR (CIRCLE_AS / SOLAR_DAY)
476#endif
477#ifndef TRACKRATE_LUNAR
479#define TRACKRATE_LUNAR 14.511415
480#endif
481#ifndef EARTHRADIUSEQUATORIAL
483#define EARTHRADIUSEQUATORIAL 6378137.0
484#endif
485#ifndef EARTHRADIUSPOLAR
487#define EARTHRADIUSPOLAR 6356752.0
488#endif
489#ifndef EARTHRADIUSMEAN
491#define EARTHRADIUSMEAN 6372797.0
492#endif
493#ifndef AVOGADRO
495#define AVOGADRO 6.02214076E+23
496#endif
497#ifndef EULER
499#define EULER 2.71828182845904523536028747135266249775724709369995
500#endif
501#ifndef PLANK
503#define PLANK 6.62607015E-34
504#endif
505#ifndef BOLTSMANN
507#define BOLTSMANN 1.380649E-23
508#endif
509#ifndef STEPHAN_BOLTSMANN
511#define STEPHAN_BOLTSMANN (2.0*pow(PI, 5)*pow(BOLTSMANN, 2)/(pow(LIGHTSPEED, 2)*15*pow(PLANK, 3)))
512#endif
513#ifndef GAS_R
515#define GAS_R (BOLTSMANN * AVOGADRO)
516#endif
517#ifndef ROOT2
519#define ROOT2 1.41421356237309504880168872420969807856967187537694
520#endif
521#ifndef PI
523#define PI 3.14159265358979323846
524#endif
525#ifndef AIRY
527#define AIRY 1.21966
528#endif
529#ifndef LIGHTSPEED
531#define LIGHTSPEED 299792458.0
532#endif
533#ifndef J2000
535#define J2000 2451545.0
536#endif
537#ifndef GAMMAJ2000
539#define GAMMAJ2000 18.6971378528
540#endif
541#ifndef ELECTRON
543#define ELECTRON 1.602176634E-19
544#endif
545#ifndef CANDLE
547#define CANDLE 0.683
548#endif
549#ifndef ASTRONOMICALUNIT
551#define ASTRONOMICALUNIT 1.495978707E+11
552#endif
553#ifndef PARSEC
555#define PARSEC (ASTRONOMICALUNIT/sin(PI*2.0/CIRCLE_AS))
556#endif
557#ifndef LY
559#define LY (LIGHTSPEED * SIDEREAL_DAY * 365.0)
560#endif
561#ifndef AU2M
567#define AU2M(au) (au * ASTRONOMICALUNIT)
568#endif
569#ifndef PARSEC2M
575#define PARSEC2M(parsec) (parsec * PARSEC)
576#endif
577#ifndef LY2M
583#define LY2M(ly) (ly * LY)
584#endif
585#ifndef M2AU
591#define M2AU(m) (m / ASTRONOMICALUNIT)
592#endif
593#ifndef M2PARSEC
599#define M2PARSEC(m) (m / PARSEC)
600#endif
601#ifndef M2LY
607#define M2LY(m) (m / LY)
608#endif
609#ifndef RAD2AS
615#define RAD2AS(rad) (rad * RAD_AS)
616#endif
617#ifndef AS2RAD
623#define AS2RAD(as) (as / RAD_AS);
624#endif
625
633inline double vlbi_default_delegate(double x, double y) {
634 return x*y;
635}
636
645inline double vlbi_magnitude_delegate(double x, double y) {
646 return sqrt(pow(x, 2)+pow(y, 2));
647}
648
657inline double vlbi_phase_delegate(double x, double y) {
658 double mag = sqrt(pow(x, 2)+pow(y, 2));
659 double rad = 0.0;
660 if(mag > 0.0) {
661 rad = acos (y / (mag > 0.0 ? mag : 1.0));
662 if(x < 0 && rad != 0)
663 rad = PI*2-rad;
664 }
665 return rad;
666}
667
675inline double vlbi_magnitude_correlator_delegate(double x, double y) {
676 return x*y;
677}
678
686inline double vlbi_phase_correlator_delegate(double x, double y) {
687 return sinxsin(x, y);
688}
689
701DLL_EXPORT unsigned long int vlbi_max_threads(unsigned long value);
702
707DLL_EXPORT const char *vlbi_get_version(void);
708
713DLL_EXPORT vlbi_context vlbi_init(void);
714
719DLL_EXPORT void vlbi_exit(vlbi_context ctx);
720
734DLL_EXPORT void vlbi_add_node(vlbi_context ctx, dsp_stream_p Stream, const char *name, int geographic_coordinates);
735
742DLL_EXPORT void vlbi_copy_node(void *ctx, const char *name, const char *node);
743
750DLL_EXPORT dsp_stream_p vlbi_get_node(void *ctx, const char *name);
751
758DLL_EXPORT int vlbi_has_node(void *ctx, const char *name);
759
765DLL_EXPORT void vlbi_del_node(vlbi_context ctx, const char *name);
766
773DLL_EXPORT int vlbi_get_nodes(void *ctx, vlbi_node** nodes);
774
782DLL_EXPORT void vlbi_add_node_from_fits(void *ctx, char *filename, const char *name, int geo);
783
791DLL_EXPORT void vlbi_add_nodes_from_sdfits(void *ctx, char *filename, const char *name, int geo);
792
800DLL_EXPORT void vlbi_filter_lp_node(void *ctx, const char *name, const char *node, double radians);
801
809DLL_EXPORT void vlbi_filter_hp_node(void *ctx, const char *name, const char *node, double radians);
810
819DLL_EXPORT void vlbi_filter_bp_node(void *ctx, const char *name, const char *node, double lo_radians, double hi_radians);
820
829DLL_EXPORT void vlbi_filter_br_node(void *ctx, const char *name, const char *node, double lo_radians, double hi_radians);
830
843DLL_EXPORT int vlbi_get_baselines(void *ctx, vlbi_baseline** baselines);
844
856DLL_EXPORT void vlbi_set_baseline_buffer(void *ctx, const char *node1, const char *node2, complex_t *buffer, int len);
857
865DLL_EXPORT dsp_stream_p vlbi_get_baseline_stream(void *ctx, const char *node1, const char *node2);
866
873DLL_EXPORT void vlbi_unlock_baseline(void *ctx, const char *node1, const char *node2);
874
885DLL_EXPORT void vlbi_set_baseline_stream(void *ctx, const char *node1, const char *node2, dsp_stream_p stream);
886
894DLL_EXPORT void vlbi_set_location(void *ctx, double lat, double lon, double el);
895
907DLL_EXPORT void vlbi_get_offsets(vlbi_context ctx, double J2000Time, const char* node1, const char* node2, double Ra, double Dec, double *offset1, double *offset2);
908
929DLL_EXPORT void vlbi_get_uv_plot(void *ctx, const char *name, int u, int v, double *target, double freq, double sr, int nodelay, int moving_baseline, vlbi_func2_t delegate, int *interrupt);
930
937DLL_EXPORT void vlbi_add_model(vlbi_context ctx, dsp_stream_p Stream, const char *name);
938
945DLL_EXPORT void vlbi_copy_model(void *ctx, const char *name, const char *node);
946
952DLL_EXPORT void vlbi_del_model(vlbi_context ctx, const char *name);
953
960DLL_EXPORT int vlbi_get_models(void *ctx, dsp_stream_p** models);
961
968DLL_EXPORT dsp_stream_p vlbi_get_model(void *ctx, const char *name);
969
976DLL_EXPORT int vlbi_has_model(void *ctx, const char *name);
977
985DLL_EXPORT void vlbi_get_ifft(vlbi_context ctx, const char *name, const char *magnitude, const char *phase);
986
994DLL_EXPORT void vlbi_get_fft(vlbi_context ctx, const char *model, const char *magnitude, const char *phase);
995
1003DLL_EXPORT void vlbi_apply_mask(vlbi_context ctx, const char *name, const char *model, const char *mask);
1004
1012DLL_EXPORT void vlbi_apply_convolution_matrix(vlbi_context ctx, const char *name, const char *model, const char *matrix);
1013
1021DLL_EXPORT void vlbi_stack_models(vlbi_context ctx, const char *name, const char *model1, const char *model2);
1022
1030DLL_EXPORT void vlbi_diff_models(vlbi_context ctx, const char *name, const char *model1, const char *model2);
1031
1037DLL_EXPORT void vlbi_shift(vlbi_context ctx, const char *name);
1038
1045DLL_EXPORT void vlbi_add_model_from_png(void *ctx, char *filename, const char *name);
1046
1053DLL_EXPORT void vlbi_add_model_from_jpeg(void *ctx, char *filename, const char *name);
1054
1061DLL_EXPORT void vlbi_add_model_from_fits(void *ctx, char *filename, const char *name);
1062
1069DLL_EXPORT void vlbi_get_model_to_png(void *ctx, char *filename, const char *name);
1070
1077DLL_EXPORT void vlbi_get_model_to_jpeg(void *ctx, char *filename, const char *name);
1078
1085DLL_EXPORT void vlbi_get_model_to_fits(void *ctx, char *filename, const char *name);
1086
1100DLL_EXPORT double* vlbi_matrix_calc_baseline_center(double *loc1, double *loc2);
1101
1109DLL_EXPORT double* vlbi_matrix_calc_3d_projection(double alt, double az, double *baseline);
1110
1117DLL_EXPORT double* vlbi_matrix_calc_uv_coordinates(double *proj, double wavelength);
1118
1124DLL_EXPORT double* vlbi_matrix_calc_location(double *loc);
1125
1132DLL_EXPORT double vlbi_matrix_estimate_geocentric_elevation(double latitude, double sea_level_elevation);
1133
1139DLL_EXPORT double vlbi_matrix_estimate_resolution_zero(double frequency);
1140
1147DLL_EXPORT double vlbi_matrix_estimate_resolution(double resolution0, double baseline);
1148
1166DLL_EXPORT timespec_t vlbi_time_mktimespec(int year, int month, int dom, int hour, int minute, int second, long nanosecond);
1167
1174
1180DLL_EXPORT double vlbi_time_J2000time_to_lst(double secs_since_J2000, double Long);
1181
1187DLL_EXPORT timespec_t vlbi_time_string_to_timespec(const char *time);
1188
1194DLL_EXPORT timespec_t vlbi_time_J2000time_to_timespec(double secs_since_J2000);
1195
1207DLL_EXPORT double vlbi_astro_mean_speed(double speed);
1208
1219DLL_EXPORT void vlbi_astro_alt_az_from_ra_dec(double J2000time, double Ra, double Dec, double Lat, double Long, double* Alt, double *Az);
1220
1227DLL_EXPORT double vlbi_astro_get_local_hour_angle(double local_sideral_time, double ra);
1228
1237DLL_EXPORT void vlbi_astro_get_alt_az_coordinates(double hour_angle, double dec, double latitude, double* alt, double *az);
1238
1244DLL_EXPORT dsp_stream_p vlbi_astro_load_spectrum(char *filename);
1245
1253DLL_EXPORT int vlbi_astro_load_spectra_catalog(char *path, dsp_stream_p **catalog, int *catalog_size);
1254
1262
1268DLL_EXPORT void vlbi_astro_save_spectrum(dsp_stream_p stream, char *filename);
1269
1275DLL_EXPORT void vlbi_astro_scan_spectrum(dsp_stream_p stream, int sample_size);
1276
1286DLL_EXPORT dsp_align_info vlbi_astro_align_spectra(dsp_stream_p spectrum, dsp_stream_p catalog, int max_lines, double decimals, double min_score);
1287
1295DLL_EXPORT double vlbi_astro_diff_spectra(dsp_stream_p spectrum0, dsp_stream_p spectrum, double decades);
1296
1304DLL_EXPORT double vlbi_astro_flux_ratio(double flux0, double flux, double delta_spectrum);
1305
1312DLL_EXPORT double vlbi_astro_estimate_brightness_temperature(double wavelength, double flux);
1313
1320DLL_EXPORT double vlbi_astro_estimate_temperature(double wavelength, double flux);
1321
1328DLL_EXPORT double vlbi_astro_estimate_flux(double wavelength, double temperature);
1329
1336DLL_EXPORT double vlbi_astro_estimate_temperature_ratio(double rad_ratio, double flux_ratio);
1337
1344DLL_EXPORT double vlbi_astro_estimate_size_ratio(double luminosity_ratio, double temperature_ratio);
1345
1352DLL_EXPORT double vlbi_astro_estimate_luminosity_ratio(double size_ratio, double flux_ratio);
1353
1360DLL_EXPORT double vlbi_astro_estimate_distance_ratio(double luminosity_ratio, double flux_ratio);
1361
1368DLL_EXPORT double vlbi_astro_estimate_distance_parallax(double rad, double baseline);
1369
1376DLL_EXPORT double vlbi_astro_estimate_redshift(double wavelength0, int wavelength);
1377
1384DLL_EXPORT double vlbi_astro_estimate_size_transient(double transient_object_velocity, double transit_time);
1385
1392DLL_EXPORT double vlbi_astro_redshift_adjust(double distance, double redshift);
1393
1399DLL_EXPORT dsp_stream_p vlbi_file_read_fits(char *filename);
1400
1407DLL_EXPORT dsp_stream_p *vlbi_file_read_sdfits(char * filename, long *n);
1408
1414#ifdef __cplusplus
1415}
1416#endif
1417
1418#endif //_VLBI_H
1419
DLL_EXPORT double vlbi_astro_estimate_temperature(double wavelength, double flux)
Estimate the physical temperature with a given flux.
DLL_EXPORT dsp_stream_p vlbi_astro_create_reference_catalog(dsp_stream_p *catalog, int catalog_size)
Create a dsp_stream_p containing all the spectral lines of all elements of a catalog.
DLL_EXPORT double vlbi_astro_diff_spectra(dsp_stream_p spectrum0, dsp_stream_p spectrum, double decades)
Compare a spectrum to a reference one.
DLL_EXPORT dsp_stream_p * vlbi_file_read_sdfits(char *filename, long *n)
Returns the distance of a far object adjusted with its measured redshift.
DLL_EXPORT double vlbi_astro_estimate_distance_ratio(double luminosity_ratio, double flux_ratio)
Returns the distance ratio of two celestial object.
DLL_EXPORT dsp_align_info vlbi_astro_align_spectra(dsp_stream_p spectrum, dsp_stream_p catalog, int max_lines, double decimals, double min_score)
Align a spectrum to a reference catalog.
DLL_EXPORT double vlbi_astro_estimate_flux(double wavelength, double temperature)
Estimate the flux from a physical temperature.
DLL_EXPORT double vlbi_astro_estimate_distance_parallax(double rad, double baseline)
Returns the distance of an object from its parallax.
DLL_EXPORT dsp_stream_p vlbi_astro_load_spectrum(char *filename)
Load a spectrum file.
DLL_EXPORT int vlbi_astro_load_spectra_catalog(char *path, dsp_stream_p **catalog, int *catalog_size)
Load a spectrum file catalog.
DLL_EXPORT double vlbi_astro_estimate_brightness_temperature(double wavelength, double flux)
Estimate the brightness temperature from a flux.
DLL_EXPORT double vlbi_astro_flux_ratio(double flux0, double flux, double delta_spectrum)
Returns the flux ratio of two objects.
DLL_EXPORT void vlbi_astro_alt_az_from_ra_dec(double J2000time, double Ra, double Dec, double Lat, double Long, double *Alt, double *Az)
Obtain the altitude and azimuth coordinate of a celestial coordinate at a specific time.
DLL_EXPORT void vlbi_astro_scan_spectrum(dsp_stream_p stream, int sample_size)
Scan a dsp_stream_p and detect the relevant spectral lines.
DLL_EXPORT void vlbi_astro_save_spectrum(dsp_stream_p stream, char *filename)
Save a spectrum stream into a file.
DLL_EXPORT void vlbi_astro_get_alt_az_coordinates(double hour_angle, double dec, double latitude, double *alt, double *az)
Returns alt-azimuth coordinates of an object.
DLL_EXPORT double vlbi_astro_estimate_luminosity_ratio(double size_ratio, double flux_ratio)
Returns the luminosity ratio between two celestial objects.
DLL_EXPORT double vlbi_astro_redshift_adjust(double distance, double redshift)
Returns the distance of a far object adjusted with its measured redshift.
DLL_EXPORT double vlbi_astro_estimate_temperature_ratio(double rad_ratio, double flux_ratio)
Returns the temperature ratio of two objects.
DLL_EXPORT double vlbi_astro_estimate_redshift(double wavelength0, int wavelength)
Returns the redshift of an object.
DLL_EXPORT dsp_stream_p vlbi_file_read_fits(char *filename)
Returns the distance of a far object adjusted with its measured redshift.
DLL_EXPORT double vlbi_astro_estimate_size_transient(double transient_object_velocity, double transit_time)
Returns the size of an object by the observation of a transient body.
DLL_EXPORT double vlbi_astro_estimate_size_ratio(double luminosity_ratio, double temperature_ratio)
Returns the size ratio of two objects.
DLL_EXPORT double vlbi_astro_get_local_hour_angle(double local_sideral_time, double ra)
Returns local hour angle of an object.
DLL_EXPORT double vlbi_astro_mean_speed(double speed)
Obtain or set the reference constant speed of the radiation to measure.
DLL_EXPORT dsp_stream_p vlbi_get_baseline_stream(void *ctx, const char *node1, const char *node2)
Obtain the baseline dsp_stream structure containing the complex visibility data.
DLL_EXPORT void vlbi_unlock_baseline(void *ctx, const char *node1, const char *node2)
Unlock the baseline and get visibility from its nodes correlations.
DLL_EXPORT void vlbi_get_offsets(vlbi_context ctx, double J2000Time, const char *node1, const char *node2, double Ra, double Dec, double *offset1, double *offset2)
Get the offsets of a single baseline nodes to the farest node to the target.
DLL_EXPORT void vlbi_set_baseline_buffer(void *ctx, const char *node1, const char *node2, complex_t *buffer, int len)
Fill the buffer of a single baseline with complex visibility data. This function locks this baeline a...
DLL_EXPORT int vlbi_get_baselines(void *ctx, vlbi_baseline **baselines)
List all baselines of the current OpenVLBI context.
DLL_EXPORT void vlbi_set_baseline_stream(void *ctx, const char *node1, const char *node2, dsp_stream_p stream)
Set the baseline dsp_stream structure containing the complex visibility data. This function locks thi...
DLL_EXPORT void vlbi_set_location(void *ctx, double lat, double lon, double el)
Set the location of the reference station.
#define sinxsin(s1, s2)
Multiply a sine to a sine.
Definition: vlbi.h:400
double vlbi_default_delegate(double x, double y)
A placeholder delegate that simply multiplies the values received from vlbi_get_uv_plot.
Definition: vlbi.h:633
#define PI
Our PI constant.
Definition: vlbi.h:523
double vlbi_magnitude_correlator_delegate(double x, double y)
A magnitude correlator delegate for vlbi_get_uv_plot.
Definition: vlbi.h:675
double vlbi_phase_correlator_delegate(double x, double y)
A phase correlator delegate for vlbi_get_uv_plot.
Definition: vlbi.h:686
double vlbi_phase_delegate(double x, double y)
A phase calculator delegate for vlbi_get_uv_plot.
Definition: vlbi.h:657
double vlbi_magnitude_delegate(double x, double y)
A magnitude calculator delegate for vlbi_get_uv_plot.
Definition: vlbi.h:645
DLL_EXPORT const char * vlbi_get_version(void)
Print the current version of OpenVLBI.
DLL_EXPORT void vlbi_exit(vlbi_context ctx)
Close a OpenVLBI instance.
DLL_EXPORT unsigned long int vlbi_max_threads(unsigned long value)
get/set the maximum number of threads allowed
DLL_EXPORT vlbi_context vlbi_init(void)
Initialize a OpenVLBI instance.
DLL_EXPORT double * vlbi_matrix_calc_baseline_center(double *loc1, double *loc2)
Return The baseline center in geographic coordinates.
DLL_EXPORT double * vlbi_matrix_calc_uv_coordinates(double *proj, double wavelength)
Return The UV coordinates of the current observation.
DLL_EXPORT double * vlbi_matrix_calc_3d_projection(double alt, double az, double *baseline)
Return The 3d projection of the current observation.
DLL_EXPORT double * vlbi_matrix_calc_location(double *loc)
Convert geographic location into xyz location.
DLL_EXPORT double vlbi_matrix_estimate_geocentric_elevation(double latitude, double sea_level_elevation)
Returns an estimation of the actual geocentric elevation.
DLL_EXPORT double vlbi_matrix_estimate_resolution_zero(double frequency)
Estimate the angular resolution of a 1 meter baseline at a given frequency.
DLL_EXPORT double vlbi_matrix_estimate_resolution(double resolution0, double baseline)
Estimate Signal to noise ratio after a given integration time.
DLL_EXPORT void vlbi_add_model_from_fits(void *ctx, char *filename, const char *name)
Add a model from a fits file.
DLL_EXPORT void vlbi_get_model_to_fits(void *ctx, char *filename, const char *name)
Write a model to a fits file.
DLL_EXPORT void vlbi_add_model(vlbi_context ctx, dsp_stream_p Stream, const char *name)
Add a model into the current OpenVLBI context.
DLL_EXPORT int vlbi_get_models(void *ctx, dsp_stream_p **models)
List all models of the current OpenVLBI context.
DLL_EXPORT void vlbi_get_model_to_jpeg(void *ctx, char *filename, const char *name)
Write a model to a jpeg file.
DLL_EXPORT void vlbi_stack_models(vlbi_context ctx, const char *name, const char *model1, const char *model2)
Stack two models into a new one.
DLL_EXPORT void vlbi_diff_models(vlbi_context ctx, const char *name, const char *model1, const char *model2)
Diff two models into a new one.
DLL_EXPORT int vlbi_has_model(void *ctx, const char *name)
Determine if a model is present into the current OpenVLBI context.
DLL_EXPORT void vlbi_add_model_from_png(void *ctx, char *filename, const char *name)
Add a model from a png file.
DLL_EXPORT void vlbi_copy_model(void *ctx, const char *name, const char *node)
Copy a model into a new one.
DLL_EXPORT void vlbi_shift(vlbi_context ctx, const char *name)
Shift a model by its dimensions.
DLL_EXPORT void vlbi_apply_convolution_matrix(vlbi_context ctx, const char *name, const char *model, const char *matrix)
Convolute a model with a convolution matrix.
DLL_EXPORT void vlbi_get_ifft(vlbi_context ctx, const char *name, const char *magnitude, const char *phase)
Save into name an inverse fourier transform of the uv plot using its current magnitude and phase comp...
DLL_EXPORT void vlbi_get_fft(vlbi_context ctx, const char *model, const char *magnitude, const char *phase)
Get the fourier transform of the given model and save its magnitude and phase components into two new...
DLL_EXPORT dsp_stream_p vlbi_get_model(void *ctx, const char *name)
Get a single model from the current OpenVLBI context.
DLL_EXPORT void vlbi_del_model(vlbi_context ctx, const char *name)
Remove a model from the current OpenVLBI context.
DLL_EXPORT void vlbi_add_model_from_jpeg(void *ctx, char *filename, const char *name)
Add a model from a jpeg file.
DLL_EXPORT void vlbi_apply_mask(vlbi_context ctx, const char *name, const char *model, const char *mask)
Mask the stream with the content of the mask stream, by multiplication of each element.
DLL_EXPORT void vlbi_get_model_to_png(void *ctx, char *filename, const char *name)
Write a model to a png file.
DLL_EXPORT void vlbi_get_uv_plot(void *ctx, const char *name, int u, int v, double *target, double freq, double sr, int nodelay, int moving_baseline, vlbi_func2_t delegate, int *interrupt)
Fill a fourier plane with an aperture synthesis projection of the baselines during the integration ti...
DLL_EXPORT dsp_stream_p vlbi_get_node(void *ctx, const char *name)
Get a stream from the current OpenVLBI context.
DLL_EXPORT void vlbi_copy_node(void *ctx, const char *name, const char *node)
Copy a node into a new one.
DLL_EXPORT void vlbi_add_node(vlbi_context ctx, dsp_stream_p Stream, const char *name, int geographic_coordinates)
Add a stream into the current OpenVLBI context.
DLL_EXPORT void vlbi_add_node_from_fits(void *ctx, char *filename, const char *name, int geo)
Add a node from a 2d image fits file.
DLL_EXPORT void vlbi_add_nodes_from_sdfits(void *ctx, char *filename, const char *name, int geo)
Add nodes from each row of a single dish fits -SDFITS- file.
DLL_EXPORT int vlbi_has_node(void *ctx, const char *name)
Determine if a node is present into the current OpenVLBI context.
DLL_EXPORT void vlbi_filter_bp_node(void *ctx, const char *name, const char *node, double lo_radians, double hi_radians)
Apply a band pass filter on the node buffer.
DLL_EXPORT void vlbi_del_node(vlbi_context ctx, const char *name)
Remove a stream from the current OpenVLBI context.
DLL_EXPORT void vlbi_filter_hp_node(void *ctx, const char *name, const char *node, double radians)
Apply a high pass filter on the node buffer.
DLL_EXPORT int vlbi_get_nodes(void *ctx, vlbi_node **nodes)
List all nodes of the current OpenVLBI context.
DLL_EXPORT void vlbi_filter_lp_node(void *ctx, const char *name, const char *node, double radians)
Apply a low pass filter on the node buffer.
DLL_EXPORT void vlbi_filter_br_node(void *ctx, const char *name, const char *node, double lo_radians, double hi_radians)
Apply a band reject filter on the node buffer.
DLL_EXPORT timespec_t vlbi_time_string_to_timespec(const char *time)
Obtain a timespec struct containing the date and time specified by a time string.
DLL_EXPORT timespec_t vlbi_time_J2000time_to_timespec(double secs_since_J2000)
Obtain a timespec struct containing the date and time specified by a J2000 time.
DLL_EXPORT timespec_t vlbi_time_mktimespec(int year, int month, int dom, int hour, int minute, int second, long nanosecond)
Obtain a timespec struct containing the date and time specified.
DLL_EXPORT double vlbi_time_timespec_to_J2000time(timespec_t tp)
Convert a timespec into J2000 time.
DLL_EXPORT double vlbi_time_J2000time_to_lst(double secs_since_J2000, double Long)
Obtain the local sidereal time at an arbitrary moment and location.
double(* vlbi_func2_t)(double, double)
The delegate function type to pass to vlbi_plot_uv_plane.
Definition: vlbi.h:340
void * vlbi_context
the OpenVLBI context object type
Definition: vlbi.h:343
struct timespec timespec_t
Definition of the timespec_t in a C type, just for convenience.
Definition: vlbi.h:346
Alignment informations needed.
Definition: dsp.h:270
Contains a set of informations and data relative to a buffer and how to use it.
Definition: dsp.h:363
A single baseline, returned by vlbi_get_baselines into an array.
Definition: vlbi.h:297
int relative
Whether this baseline's nodes use coordinates relative to the context reference station.
Definition: vlbi.h:299
char * Name
Baseline's name.
Definition: vlbi.h:325
double delay
Current delay in seconds.
Definition: vlbi.h:315
double * baseline
The baseline's 3d sizes in meters.
Definition: vlbi.h:309
double u
Current u perspective location in pixels.
Definition: vlbi.h:311
vlbi_node Node2
Latter node.
Definition: vlbi.h:323
int locked
Whether this baseline's nodes use coordinates relative to the context reference station.
Definition: vlbi.h:301
double WaveLength
Wavelength observed in meters.
Definition: vlbi.h:317
dsp_stream_p Stream
Baseline's DSP stream.
Definition: vlbi.h:327
double * Target
The baseline's current celestial target array.
Definition: vlbi.h:303
vlbi_node Node1
Earlier node.
Definition: vlbi.h:321
double Ra
The baseline's current celestial target right ascension.
Definition: vlbi.h:305
double SampleRate
Samples per second.
Definition: vlbi.h:319
double Dec
The baseline's current celestial target declination.
Definition: vlbi.h:307
double v
Current v perspective location in pixels.
Definition: vlbi.h:313
A single node, returned by vlbi_get_nodes into an array.
Definition: vlbi.h:281
int Geo
Whether this node uses geographic coordinates.
Definition: vlbi.h:287
double * GeographicLocation
Geographic coordinates array (latitude, longitude, elevation)
Definition: vlbi.h:283
dsp_stream_p Stream
Node's DSP stream.
Definition: vlbi.h:289
int Index
Node's index - oldest zero.
Definition: vlbi.h:293
double * Location
Current location array in meters.
Definition: vlbi.h:285
char * Name
Node's name.
Definition: vlbi.h:291