static PyObject* create_copy(PyObject* self, PyObject* args)
{
oskar_Sky *h = 0, *t = 0;
PyObject* capsule = 0;
int status = 0;
if (!PyArg_ParseTuple(args, "O", &capsule)) return 0;
if (!(h = get_handle(capsule))) return 0;
t = oskar_sky_create_copy(h, OSKAR_CPU, &status);
/* Check for errors. */
if (status || !t)
{
PyErr_Format(PyExc_RuntimeError,
"oskar_sky_create_copy() failed with code %d (%s).",
status, oskar_get_error_string(status));
oskar_sky_free(t, &status);
return 0;
}
capsule = PyCapsule_New((void*)t, name, (PyCapsule_Destructor)sky_free);
return Py_BuildValue("N", capsule); /* Don't increment refcount. */
}
void oskar_evaluate_jones_Z(oskar_Jones* Z, const oskar_Sky* sky,
const oskar_Telescope* telescope,
const oskar_SettingsIonosphere* settings, double gast,
double frequency_hz, oskar_WorkJonesZ* work, int* status)
{
int i, num_sources, num_stations;
/* Station position in ECEF frame */
double station_x, station_y, station_z, wavelength;
oskar_Mem *Z_station;
int type;
oskar_Sky* sky_cpu; /* Copy of the sky model on the CPU */
/* Check if safe to proceed. */
if (*status) return;
/* Check data types. */
type = oskar_sky_precision(sky);
if (oskar_telescope_precision(telescope) != type ||
oskar_jones_type(Z) != (type | OSKAR_COMPLEX) ||
oskar_work_jones_z_type(work) != type)
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
/* For now, this function requires data is on the CPU .. check this. */
/* Resize the work array (if needed) */
num_stations = oskar_telescope_num_stations(telescope);
num_sources = oskar_sky_num_sources(sky);
oskar_work_jones_z_resize(work, num_sources, status);
/* Copy the sky model to the CPU. */
sky_cpu = oskar_sky_create_copy(sky, OSKAR_CPU, status);
Z_station = oskar_mem_create_alias(0, 0, 0, status);
wavelength = 299792458.0 / frequency_hz;
/* Evaluate the ionospheric phase screen for each station at each
* source pierce point. */
for (i = 0; i < num_stations; ++i)
{
double last, lon, lat;
const oskar_Station* station;
station = oskar_telescope_station_const(telescope, i);
lon = oskar_station_lon_rad(station);
lat = oskar_station_lat_rad(station);
last = gast + lon;
/* Evaluate horizontal x,y,z source positions (for which to evaluate
* pierce points) */
oskar_convert_relative_directions_to_enu_directions(
work->hor_x, work->hor_y, work->hor_z, num_sources,
oskar_sky_l_const(sky_cpu), oskar_sky_m_const(sky_cpu),
oskar_sky_n_const(sky_cpu), last - oskar_sky_reference_ra_rad(sky_cpu),
oskar_sky_reference_dec_rad(sky_cpu), lat, status);
/* Obtain station coordinates in the ECEF frame. */
evaluate_station_ECEF_coords(&station_x, &station_y, &station_z, i,
telescope);
/* Obtain the pierce points. */
/* FIXME(BM) this is current hard-coded to TID height screen 0
* this fix is only needed to support multiple screen heights. */
oskar_evaluate_pierce_points(work->pp_lon, work->pp_lat,
work->pp_rel_path, station_x, station_y,
station_z, settings->TID[0].height_km * 1000., num_sources,
work->hor_x, work->hor_y, work->hor_z, status);
/* Evaluate TEC values for the pierce points */
oskar_evaluate_TEC(work, num_sources, settings, gast, status);
/* Get a pointer to the Jones matrices for the station */
oskar_jones_get_station_pointer(Z_station, Z, i, status);
/* Populate the Jones matrix with ionospheric phase */
evaluate_jones_Z_station(Z_station, wavelength,
work->total_TEC, work->hor_z, settings->min_elevation,
num_sources, status);
}
oskar_sky_free(sky_cpu, status);
oskar_mem_free(Z_station, status);
}
