void oskar_element_load_scalar(oskar_Element* data,
double freq_hz, const char* filename,
double closeness, double closeness_inc, int ignore_at_poles,
int ignore_below_horizon, int* status)
{
int i, n = 0, type = OSKAR_DOUBLE;
oskar_Splines *scalar_re = 0, *scalar_im = 0;
oskar_Mem *theta = 0, *phi = 0, *re = 0, *im = 0, *weight = 0;
/* Declare the line buffer. */
char *line = NULL;
size_t bufsize = 0;
FILE* file;
/* Check if safe to proceed. */
if (*status) return;
/* Check the data type. */
if (oskar_element_precision(data) != type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
/* Check the location. */
if (oskar_element_mem_location(data) != OSKAR_CPU)
{
*status = OSKAR_ERR_BAD_LOCATION;
return;
}
/* Check if this frequency has already been set, and get its index if so. */
n = data->num_freq;
for (i = 0; i < n; ++i)
{
if (fabs(data->freqs_hz[i] - freq_hz) <= freq_hz * DBL_EPSILON)
break;
}
/* Expand arrays to hold data for a new frequency, if needed. */
if (i >= data->num_freq)
{
i = data->num_freq;
oskar_element_resize_freq_data(data, i + 1, status);
data->freqs_hz[i] = freq_hz;
}
/* Get pointers to surface data based on frequency index. */
scalar_re = data->scalar_re[i];
scalar_im = data->scalar_im[i];
/* Open the file. */
file = fopen(filename, "r");
if (!file)
{
*status = OSKAR_ERR_FILE_IO;
return;
}
/* Create local arrays to hold data for fitting. */
theta = oskar_mem_create(type, OSKAR_CPU, 0, status);
phi = oskar_mem_create(type, OSKAR_CPU, 0, status);
re = oskar_mem_create(type, OSKAR_CPU, 0, status);
im = oskar_mem_create(type, OSKAR_CPU, 0, status);
weight = oskar_mem_create(type, OSKAR_CPU, 0, status);
if (*status) return;
/* Loop over and read each line in the file. */
n = 0;
while (oskar_getline(&line, &bufsize, file) != OSKAR_ERR_EOF)
{
double re_, im_;
double par[] = {0., 0., 0., 0.}; /* theta, phi, amp, phase (optional) */
void *p_theta = 0, *p_phi = 0, *p_re = 0, *p_im = 0, *p_weight = 0;
/* Parse the line, and skip if data were not read correctly. */
if (oskar_string_to_array_d(line, 4, par) < 3)
continue;
/* Ignore data below horizon if requested. */
if (ignore_below_horizon && par[0] > 90.0) continue;
/* Ignore data at poles if requested. */
if (ignore_at_poles)
if (par[0] < 1e-6 || par[0] > (180.0 - 1e-6)) continue;
/* Convert angular measures to radians. */
par[0] *= DEG2RAD; /* theta */
par[1] *= DEG2RAD; /* phi */
par[3] *= DEG2RAD; /* phase */
/* Ensure enough space in arrays. */
if (n % 100 == 0)
{
const int size = n + 100;
oskar_mem_realloc(theta, size, status);
oskar_mem_realloc(phi, size, status);
oskar_mem_realloc(re, size, status);
oskar_mem_realloc(im, size, status);
oskar_mem_realloc(weight, size, status);
if (*status) break;
}
p_theta = oskar_mem_void(theta);
p_phi = oskar_mem_void(phi);
p_re = oskar_mem_void(re);
p_im = oskar_mem_void(im);
p_weight = oskar_mem_void(weight);
/* Amp,phase to real,imag conversion. */
re_ = par[2] * cos(par[3]);
im_ = par[2] * sin(par[3]);
/* Store the surface data. */
((double*)p_theta)[n] = par[0];
((double*)p_phi)[n] = par[1];
((double*)p_re)[n] = re_;
((double*)p_im)[n] = im_;
((double*)p_weight)[n] = 1.0;
/* Increment array pointer. */
n++;
}
/* Free the line buffer and close the file. */
free(line);
fclose(file);
/* Fit splines to the surface data. */
fit_splines(scalar_re, n, theta, phi, re, weight,
closeness, closeness_inc, "Scalar [real]", status);
fit_splines(scalar_im, n, theta, phi, im, weight,
closeness, closeness_inc, "Scalar [imag]", status);
/* Store the filename. */
oskar_mem_append_raw(data->filename_scalar[i], filename, OSKAR_CHAR,
OSKAR_CPU, 1 + strlen(filename), status);
/* Free local arrays. */
oskar_mem_free(theta, status);
oskar_mem_free(phi, status);
oskar_mem_free(re, status);
oskar_mem_free(im, status);
oskar_mem_free(weight, status);
}
void oskar_element_load_cst(oskar_Element* data, oskar_Log* log,
int port, double freq_hz, const char* filename,
double closeness, double closeness_inc, int ignore_at_poles,
int ignore_below_horizon, int* status)
{
int i, n = 0, type = OSKAR_DOUBLE;
size_t fname_len;
oskar_Splines *data_h_re = 0, *data_h_im = 0;
oskar_Splines *data_v_re = 0, *data_v_im = 0;
oskar_Mem *theta, *phi, *h_re, *h_im, *v_re, *v_im, *weight;
/* Declare the line buffer. */
char *line = 0, *dbi = 0, *ludwig3 = 0;
size_t bufsize = 0;
FILE* file;
/* Check if safe to proceed. */
if (*status) return;
/* Check port number. */
if (port != 0 && port != 1 && port != 2)
{
*status = OSKAR_ERR_INVALID_ARGUMENT;
return;
}
/* Check the data type. */
if (oskar_element_precision(data) != type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
/* Check the location. */
if (oskar_element_mem_location(data) != OSKAR_CPU)
{
*status = OSKAR_ERR_BAD_LOCATION;
return;
}
/* Check if this frequency has already been set, and get its index if so. */
n = data->num_freq;
for (i = 0; i < n; ++i)
{
if (fabs(data->freqs_hz[i] - freq_hz) <= freq_hz * DBL_EPSILON)
break;
}
/* Expand arrays to hold data for a new frequency, if needed. */
if (i >= data->num_freq)
{
i = data->num_freq;
oskar_element_resize_freq_data(data, i + 1, status);
data->freqs_hz[i] = freq_hz;
}
/* Get pointers to surface data based on port number and frequency index. */
if (port == 1 || port == 0)
{
data_h_re = oskar_element_x_h_re(data, i);
data_h_im = oskar_element_x_h_im(data, i);
data_v_re = oskar_element_x_v_re(data, i);
data_v_im = oskar_element_x_v_im(data, i);
}
else if (port == 2)
{
data_h_re = oskar_element_y_h_re(data, i);
data_h_im = oskar_element_y_h_im(data, i);
data_v_re = oskar_element_y_v_re(data, i);
data_v_im = oskar_element_y_v_im(data, i);
}
/* Open the file. */
fname_len = 1 + strlen(filename);
file = fopen(filename, "r");
if (!file)
{
*status = OSKAR_ERR_FILE_IO;
return;
}
/* Read the first line to check units and coordinate system. */
if (oskar_getline(&line, &bufsize, file) < 0)
{
*status = OSKAR_ERR_FILE_IO;
free(line);
fclose(file);
return;
}
/* Check for presence of "dBi". */
dbi = strstr(line, "dBi");
/* Check for data in Ludwig-3 polarisation system. */
ludwig3 = strstr(line, "Horiz");
/* Create local arrays to hold data for fitting. */
theta = oskar_mem_create(type, OSKAR_CPU, 0, status);
phi = oskar_mem_create(type, OSKAR_CPU, 0, status);
h_re = oskar_mem_create(type, OSKAR_CPU, 0, status);
h_im = oskar_mem_create(type, OSKAR_CPU, 0, status);
v_re = oskar_mem_create(type, OSKAR_CPU, 0, status);
v_im = oskar_mem_create(type, OSKAR_CPU, 0, status);
weight = oskar_mem_create(type, OSKAR_CPU, 0, status);
if (*status) return;
/* Loop over and read each line in the file. */
n = 0;
while (oskar_getline(&line, &bufsize, file) != OSKAR_ERR_EOF)
{
double t = 0., p = 0., abs_theta_horiz, phase_theta_horiz;
double abs_phi_verti, phase_phi_verti;
double theta_horiz_re, theta_horiz_im, phi_verti_re, phi_verti_im;
double h_re_, h_im_, v_re_, v_im_;
void *p_theta = 0, *p_phi = 0, *p_h_re = 0, *p_h_im = 0, *p_v_re = 0;
void *p_v_im = 0, *p_weight = 0;
/* Parse the line, and skip if data were not read correctly. */
if (sscanf(line, "%lf %lf %*f %lf %lf %lf %lf %*f", &t, &p,
&abs_theta_horiz, &phase_theta_horiz,
&abs_phi_verti, &phase_phi_verti) != 6)
continue;
/* Ignore data below horizon if requested. */
if (ignore_below_horizon && t > 90.0) continue;
/* Ignore data at poles if requested. */
if (ignore_at_poles)
if (t < 1e-6 || t > (180.0 - 1e-6)) continue;
/* Convert angular measures to radians. */
t *= DEG2RAD;
p *= DEG2RAD;
phase_theta_horiz *= DEG2RAD;
phase_phi_verti *= DEG2RAD;
/* Ensure enough space in arrays. */
if (n % 100 == 0)
{
int size;
size = n + 100;
oskar_mem_realloc(theta, size, status);
oskar_mem_realloc(phi, size, status);
oskar_mem_realloc(h_re, size, status);
oskar_mem_realloc(h_im, size, status);
oskar_mem_realloc(v_re, size, status);
oskar_mem_realloc(v_im, size, status);
oskar_mem_realloc(weight, size, status);
if (*status) break;
}
p_theta = oskar_mem_void(theta);
p_phi = oskar_mem_void(phi);
p_h_re = oskar_mem_void(h_re);
p_h_im = oskar_mem_void(h_im);
p_v_re = oskar_mem_void(v_re);
p_v_im = oskar_mem_void(v_im);
p_weight = oskar_mem_void(weight);
/* Convert decibel to linear scale if necessary. */
if (dbi)
{
abs_theta_horiz = pow(10.0, abs_theta_horiz / 10.0);
abs_phi_verti = pow(10.0, abs_phi_verti / 10.0);
}
/* Amp,phase to real,imag conversion. */
theta_horiz_re = abs_theta_horiz * cos(phase_theta_horiz);
theta_horiz_im = abs_theta_horiz * sin(phase_theta_horiz);
phi_verti_re = abs_phi_verti * cos(phase_phi_verti);
phi_verti_im = abs_phi_verti * sin(phase_phi_verti);
/* Convert to Ludwig-3 polarisation system if required. */
if (ludwig3)
{
/* Already in Ludwig-3: No conversion required. */
h_re_ = theta_horiz_re;
h_im_ = theta_horiz_im;
v_re_ = phi_verti_re;
v_im_ = phi_verti_im;
}
else
{
/* Convert from theta/phi to Ludwig-3. */
double cos_p, sin_p;
sin_p = sin(p);
cos_p = cos(p);
h_re_ = theta_horiz_re * cos_p - phi_verti_re * sin_p;
h_im_ = theta_horiz_im * cos_p - phi_verti_im * sin_p;
v_re_ = theta_horiz_re * sin_p + phi_verti_re * cos_p;
v_im_ = theta_horiz_im * sin_p + phi_verti_im * cos_p;
}
/* Store the surface data in Ludwig-3 format. */
((double*)p_theta)[n] = t;
((double*)p_phi)[n] = p;
((double*)p_h_re)[n] = h_re_;
((double*)p_h_im)[n] = h_im_;
((double*)p_v_re)[n] = v_re_;
((double*)p_v_im)[n] = v_im_;
((double*)p_weight)[n] = 1.0;
/* Increment array pointer. */
n++;
}
/* Free the line buffer and close the file. */
free(line);
fclose(file);
/* Fit splines to the surface data. */
fit_splines(log, data_h_re, n, theta, phi, h_re, weight,
closeness, closeness_inc, "H [real]", status);
fit_splines(log, data_h_im, n, theta, phi, h_im, weight,
closeness, closeness_inc, "H [imag]", status);
fit_splines(log, data_v_re, n, theta, phi, v_re, weight,
closeness, closeness_inc, "V [real]", status);
fit_splines(log, data_v_im, n, theta, phi, v_im, weight,
closeness, closeness_inc, "V [imag]", status);
/* Store the filename. */
if (port == 0)
{
oskar_mem_append_raw(data->filename_x[i], filename, OSKAR_CHAR,
OSKAR_CPU, fname_len, status);
oskar_mem_append_raw(data->filename_y[i], filename, OSKAR_CHAR,
OSKAR_CPU, fname_len, status);
}
else if (port == 1)
{
oskar_mem_append_raw(data->filename_x[i], filename, OSKAR_CHAR,
OSKAR_CPU, fname_len, status);
}
else if (port == 2)
{
oskar_mem_append_raw(data->filename_y[i], filename, OSKAR_CHAR,
OSKAR_CPU, fname_len, status);
}
/* Copy X to Y if both ports are the same. */
if (port == 0)
{
oskar_splines_copy(data->y_h_re[i], data->x_h_re[i], status);
oskar_splines_copy(data->y_h_im[i], data->x_h_im[i], status);
oskar_splines_copy(data->y_v_re[i], data->x_v_re[i], status);
oskar_splines_copy(data->y_v_im[i], data->x_v_im[i], status);
}
/* Free local arrays. */
oskar_mem_free(theta, status);
oskar_mem_free(phi, status);
oskar_mem_free(h_re, status);
oskar_mem_free(h_im, status);
oskar_mem_free(v_re, status);
oskar_mem_free(v_im, status);
oskar_mem_free(weight, status);
}