// radio.cxx -- implementation of FGRadio
// Class to manage radio propagation using the ITM model
-// Written by Adrian Musceac, started August 2011.
+// Written by Adrian Musceac YO8RZZ, started August 2011.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
#include "radio.hxx"
#include <simgear/scene/material/mat.hxx>
#include <Scenery/scenery.hxx>
+#include <boost/scoped_array.hpp>
#define WITH_POINT_TO_POINT 1
#include "itm.cpp"
double FGRadioTransmission::ITM_calculate_attenuation(SGGeod pos, double freq, int transmission_type) {
-
+ if((freq < 40.0) || (freq > 20000.0)) // frequency out of recommended range
+ return -1;
/** ITM default parameters
TODO: take them from tile materials (especially for sea)?
**/
int max_points = (int)floor(distance_m / point_distance);
- double delta_last = fmod(distance_m, point_distance);
+ //double delta_last = fmod(distance_m, point_distance);
deque<double> elevations;
- deque<string> materials;
+ deque<string*> materials;
double elevation_under_pilot = 0.0;
elevations.push_back(elevation_m);
if(mat) {
const std::vector<string> mat_names = mat->get_names();
- materials.push_back(mat_names[0]);
+ string* name = new string(mat_names[0]);
+ materials.push_back(name);
}
else {
- materials.push_back("None");
+ string* no_material = new string("None");
+ materials.push_back(no_material);
}
}
else {
elevations.push_front(elevation_m);
if(mat) {
const std::vector<string> mat_names = mat->get_names();
- materials.push_front(mat_names[0]);
+ string* name = new string(mat_names[0]);
+ materials.push_front(name);
}
else {
- materials.push_front("None");
+ string* no_material = new string("None");
+ materials.push_front(no_material);
}
}
}
else {
if((transmission_type == 3) || (transmission_type == 4)) {
elevations.push_back(0.0);
- materials.push_back("None");
+ string* no_material = new string("None");
+ materials.push_back(no_material);
}
else {
+ string* no_material = new string("None");
elevations.push_front(0.0);
- materials.push_front("None");
+ materials.push_front(no_material);
}
}
}
if((transmission_type == 3) || (transmission_type == 4)) {
elevations.push_front(elevation_under_pilot);
- if (delta_last > (point_distance / 2) ) // only add last point if it's farther than half point_distance
+ //if (delta_last > (point_distance / 2) ) // only add last point if it's farther than half point_distance
elevations.push_back(elevation_under_sender);
}
else {
elevations.push_back(elevation_under_pilot);
- if (delta_last > (point_distance / 2) )
+ //if (delta_last > (point_distance / 2) )
elevations.push_front(elevation_under_sender);
}
elevations.push_front(num_points -1);
int size = elevations.size();
- double *itm_elev;
- itm_elev = new double[size];
+ boost::scoped_array<double> itm_elev( new double[size] );
for(int i=0;i<size;i++) {
itm_elev[i]=elevations[i];
if((transmission_type == 3) || (transmission_type == 4)) {
// the sender and receiver roles are switched
- point_to_point(itm_elev, receiver_height, transmitter_height,
+ ITM::point_to_point(itm_elev.get(), receiver_height, transmitter_height,
eps_dielect, sgm_conductivity, eno, frq_mhz, radio_climate,
pol, conf, rel, dbloss, strmode, p_mode, horizons, errnum);
if( _root_node->getBoolValue( "use-clutter-attenuation", false ) )
- calculate_clutter_loss(frq_mhz, itm_elev, materials, receiver_height, transmitter_height, p_mode, horizons, clutter_loss);
+ calculate_clutter_loss(frq_mhz, itm_elev.get(), materials, receiver_height, transmitter_height, p_mode, horizons, clutter_loss);
}
else {
- point_to_point(itm_elev, transmitter_height, receiver_height,
+ ITM::point_to_point(itm_elev.get(), transmitter_height, receiver_height,
eps_dielect, sgm_conductivity, eno, frq_mhz, radio_climate,
pol, conf, rel, dbloss, strmode, p_mode, horizons, errnum);
if( _root_node->getBoolValue( "use-clutter-attenuation", false ) )
- calculate_clutter_loss(frq_mhz, itm_elev, materials, transmitter_height, receiver_height, p_mode, horizons, clutter_loss);
+ calculate_clutter_loss(frq_mhz, itm_elev.get(), materials, transmitter_height, receiver_height, p_mode, horizons, clutter_loss);
}
double pol_loss = 0.0;
//_root_node->setDoubleValue("station[0]/tx-pattern-gain", tx_pattern_gain);
//_root_node->setDoubleValue("station[0]/rx-pattern-gain", rx_pattern_gain);
- delete[] itm_elev;
-
+ for (unsigned i =0; i < materials.size(); i++) {
+ delete materials[i];
+ }
+
return signal;
}
-void FGRadioTransmission::calculate_clutter_loss(double freq, double itm_elev[], deque<string> &materials,
+void FGRadioTransmission::calculate_clutter_loss(double freq, double itm_elev[], deque<string*> &materials,
double transmitter_height, double receiver_height, int p_mode,
double horizons[], double &clutter_loss) {
double distance_m = itm_elev[0] * itm_elev[1]; // only consider elevation points
-
+ unsigned mat_size = materials.size();
if (p_mode == 0) { // LOS: take each point and see how clutter height affects first Fresnel zone
int mat = 0;
int j=1;
double clutter_height = 0.0; // mean clutter height for a certain terrain type
double clutter_density = 0.0; // percent of reflected wave
+ if((unsigned)mat >= mat_size) { //this tends to happen when the model interferes with the antenna (obstructs)
+ //cerr << "Array index out of bounds 0-0: " << mat << " size: " << mat_size << endl;
+ break;
+ }
get_material_properties(materials[mat], clutter_height, clutter_density);
double grad = fabs(itm_elev[2] + transmitter_height - itm_elev[(int)itm_elev[0] + 2] + receiver_height) / distance_m;
// First Fresnel radius
double frs_rad = 548 * sqrt( (j * itm_elev[1] * (itm_elev[0] - j) * itm_elev[1] / 1000000) / ( distance_m * freq / 1000) );
-
+ if (frs_rad <= 0.0) { //this tends to happen when the model interferes with the antenna (obstructs)
+ //cerr << "Frs rad 0-0: " << frs_rad << endl;
+ continue;
+ }
//double earth_h = distance_m * (distance_m - j * itm_elev[1]) / ( 1000000 * 12.75 * 1.33 ); // K=4/3
double min_elev = SGMiscd::min(itm_elev[2] + transmitter_height, itm_elev[(int)itm_elev[0] + 2] + receiver_height);
break;
double clutter_height = 0.0; // mean clutter height for a certain terrain type
double clutter_density = 0.0; // percent of reflected wave
+
+ if((unsigned)mat >= mat_size) {
+ //cerr << "Array index out of bounds 1-1: " << mat << " size: " << mat_size << endl;
+ break;
+ }
get_material_properties(materials[mat], clutter_height, clutter_density);
double grad = fabs(itm_elev[2] + transmitter_height - itm_elev[num_points_1st + 2] + clutter_height) / distance_m;
// First Fresnel radius
double frs_rad = 548 * sqrt( (j * itm_elev[1] * (num_points_1st - j) * itm_elev[1] / 1000000) / ( num_points_1st * itm_elev[1] * freq / 1000) );
-
+ if (frs_rad <= 0.0) {
+ //cerr << "Frs rad 1-1: " << frs_rad << endl;
+ continue;
+ }
//double earth_h = distance_m * (distance_m - j * itm_elev[1]) / ( 1000000 * 12.75 * 1.33 ); // K=4/3
double min_elev = SGMiscd::min(itm_elev[2] + transmitter_height, itm_elev[num_points_1st + 2] + clutter_height);
break;
double clutter_height = 0.0; // mean clutter height for a certain terrain type
double clutter_density = 0.0; // percent of reflected wave
+
+ if((unsigned)mat >= mat_size) {
+ //cerr << "Array index out of bounds 1-2: " << mat << " size: " << mat_size << endl;
+ break;
+ }
get_material_properties(materials[mat], clutter_height, clutter_density);
double grad = fabs(itm_elev[last+1] + clutter_height - itm_elev[(int)itm_elev[0] + 2] + receiver_height) / distance_m;
// First Fresnel radius
double frs_rad = 548 * sqrt( (j * itm_elev[1] * (num_points_2nd - j) * itm_elev[1] / 1000000) / ( num_points_2nd * itm_elev[1] * freq / 1000) );
-
+ if (frs_rad <= 0.0) {
+ //cerr << "Frs rad 1-2: " << frs_rad << " numpoints2 " << num_points_2nd << " j: " << j << endl;
+ continue;
+ }
//double earth_h = distance_m * (distance_m - j * itm_elev[1]) / ( 1000000 * 12.75 * 1.33 ); // K=4/3
double min_elev = SGMiscd::min(itm_elev[last+1] + clutter_height, itm_elev[(int)itm_elev[0] + 2] + receiver_height);
break;
double clutter_height = 0.0; // mean clutter height for a certain terrain type
double clutter_density = 0.0; // percent of reflected wave
+ if((unsigned)mat >= mat_size) {
+ //cerr << "Array index out of bounds 2-1: " << mat << " size: " << mat_size << endl;
+ break;
+ }
get_material_properties(materials[mat], clutter_height, clutter_density);
double grad = fabs(itm_elev[2] + transmitter_height - itm_elev[num_points_1st + 2] + clutter_height) / distance_m;
// First Fresnel radius
double frs_rad = 548 * sqrt( (j * itm_elev[1] * (num_points_1st - j) * itm_elev[1] / 1000000) / ( num_points_1st * itm_elev[1] * freq / 1000) );
-
+ if (frs_rad <= 0.0) {
+ //cerr << "Frs rad 2-1: " << frs_rad << " numpoints1 " << num_points_1st << " j: " << j << endl;
+ continue;
+ }
//double earth_h = distance_m * (distance_m - j * itm_elev[1]) / ( 1000000 * 12.75 * 1.33 ); // K=4/3
double min_elev = SGMiscd::min(itm_elev[2] + transmitter_height, itm_elev[num_points_1st + 2] + clutter_height);
// no losses
}
j++;
+ mat++;
last = k;
}
mat +=1;
break;
double clutter_height = 0.0; // mean clutter height for a certain terrain type
double clutter_density = 0.0; // percent of reflected wave
+ if((unsigned)mat >= mat_size) {
+ //cerr << "Array index out of bounds 2-2: " << mat << " size: " << mat_size << endl;
+ break;
+ }
get_material_properties(materials[mat], clutter_height, clutter_density);
double grad = fabs(itm_elev[last+1] + clutter_height - itm_elev[num_points_1st + num_points_2nd + 2] + clutter_height) / distance_m;
// First Fresnel radius
double frs_rad = 548 * sqrt( (j * itm_elev[1] * (num_points_2nd - j) * itm_elev[1] / 1000000) / ( num_points_2nd * itm_elev[1] * freq / 1000) );
-
+ if (frs_rad <= 0.0) {
+ //cerr << "Frs rad 2-2: " << frs_rad << " numpoints2 " << num_points_2nd << " j: " << j << endl;
+ continue;
+ }
//double earth_h = distance_m * (distance_m - j * itm_elev[1]) / ( 1000000 * 12.75 * 1.33 ); // K=4/3
double min_elev = SGMiscd::min(itm_elev[last+1] + clutter_height, itm_elev[num_points_1st + num_points_2nd +2] + clutter_height);
break;
double clutter_height = 0.0; // mean clutter height for a certain terrain type
double clutter_density = 0.0; // percent of reflected wave
+ if((unsigned)mat >= mat_size) {
+ //cerr << "Array index out of bounds 2-3: " << mat << " size: " << mat_size << endl;
+ break;
+ }
get_material_properties(materials[mat], clutter_height, clutter_density);
double grad = fabs(itm_elev[last2+1] + clutter_height - itm_elev[(int)itm_elev[0] + 2] + receiver_height) / distance_m;
// First Fresnel radius
double frs_rad = 548 * sqrt( (j * itm_elev[1] * (num_points_3rd - j) * itm_elev[1] / 1000000) / ( num_points_3rd * itm_elev[1] * freq / 1000) );
-
+ if (frs_rad <= 0.0) {
+ //cerr << "Frs rad 2-3: " << frs_rad << " numpoints3 " << num_points_3rd << " j: " << j << endl;
+ continue;
+ }
//double earth_h = distance_m * (distance_m - j * itm_elev[1]) / ( 1000000 * 12.75 * 1.33 ); // K=4/3
}
-void FGRadioTransmission::get_material_properties(string mat_name, double &height, double &density) {
+void FGRadioTransmission::get_material_properties(string* mat_name, double &height, double &density) {
+
+ if(!mat_name)
+ return;
- if(mat_name == "Landmass") {
+ if(*mat_name == "Landmass") {
height = 15.0;
density = 0.2;
}
- else if(mat_name == "SomeSort") {
+ else if(*mat_name == "SomeSort") {
height = 15.0;
density = 0.2;
}
- else if(mat_name == "Island") {
+ else if(*mat_name == "Island") {
height = 15.0;
density = 0.2;
}
- else if(mat_name == "Default") {
+ else if(*mat_name == "Default") {
height = 15.0;
density = 0.2;
}
- else if(mat_name == "EvergreenBroadCover") {
+ else if(*mat_name == "EvergreenBroadCover") {
height = 20.0;
density = 0.2;
}
- else if(mat_name == "EvergreenForest") {
+ else if(*mat_name == "EvergreenForest") {
height = 20.0;
density = 0.2;
}
- else if(mat_name == "DeciduousBroadCover") {
+ else if(*mat_name == "DeciduousBroadCover") {
height = 15.0;
density = 0.3;
}
- else if(mat_name == "DeciduousForest") {
+ else if(*mat_name == "DeciduousForest") {
height = 15.0;
density = 0.3;
}
- else if(mat_name == "MixedForestCover") {
+ else if(*mat_name == "MixedForestCover") {
height = 20.0;
density = 0.25;
}
- else if(mat_name == "MixedForest") {
+ else if(*mat_name == "MixedForest") {
height = 15.0;
density = 0.25;
}
- else if(mat_name == "RainForest") {
+ else if(*mat_name == "RainForest") {
height = 25.0;
density = 0.55;
}
- else if(mat_name == "EvergreenNeedleCover") {
+ else if(*mat_name == "EvergreenNeedleCover") {
height = 15.0;
density = 0.2;
}
- else if(mat_name == "WoodedTundraCover") {
+ else if(*mat_name == "WoodedTundraCover") {
height = 5.0;
density = 0.15;
}
- else if(mat_name == "DeciduousNeedleCover") {
+ else if(*mat_name == "DeciduousNeedleCover") {
height = 5.0;
density = 0.2;
}
- else if(mat_name == "ScrubCover") {
+ else if(*mat_name == "ScrubCover") {
height = 3.0;
density = 0.15;
}
- else if(mat_name == "BuiltUpCover") {
+ else if(*mat_name == "BuiltUpCover") {
height = 30.0;
density = 0.7;
}
- else if(mat_name == "Urban") {
+ else if(*mat_name == "Urban") {
height = 30.0;
density = 0.7;
}
- else if(mat_name == "Construction") {
+ else if(*mat_name == "Construction") {
height = 30.0;
density = 0.7;
}
- else if(mat_name == "Industrial") {
+ else if(*mat_name == "Industrial") {
height = 30.0;
density = 0.7;
}
- else if(mat_name == "Port") {
+ else if(*mat_name == "Port") {
height = 30.0;
density = 0.7;
}
- else if(mat_name == "Town") {
+ else if(*mat_name == "Town") {
height = 10.0;
density = 0.5;
}
- else if(mat_name == "SubUrban") {
+ else if(*mat_name == "SubUrban") {
height = 10.0;
density = 0.5;
}
- else if(mat_name == "CropWoodCover") {
+ else if(*mat_name == "CropWoodCover") {
height = 10.0;
density = 0.1;
}
- else if(mat_name == "CropWood") {
+ else if(*mat_name == "CropWood") {
height = 10.0;
density = 0.1;
}
- else if(mat_name == "AgroForest") {
+ else if(*mat_name == "AgroForest") {
height = 10.0;
density = 0.1;
}
projects / flightgear.git / blobdiff