aera.h

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// AERA extension for dump1090
//
// Copyright (C) 2013-14 by Andreas Lang <andreas.lang3@student.kit.edu>
// Version 1.1 - 02.07.2014
//
#ifndef __AERA_H
#define __AERA_H

// ============================= Include files ==========================

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <fcntl.h>
#include <sys/time.h>

// ============================= #defines ===============================

#define AERA_DEG_TO_RAD                 0.017453292519943295769236907684886 // PI/180
#define AERA_EARTH_RADIUS_IN_METERS     6372797.560856                      // Earth's quatratic mean radius for WGS-84
#define AERA_STATION_LATITUDE        -35.108405932 // Coordinates of CRS
#define AERA_STATION_LONGITUDE       -69.533337772 // Coordinates of CRS
#define AERA_STATION_ALTITUDE        1559.49       // Altitude of CRS

#ifndef AERA_STATION_LATITUDE                     // For testing in Karlsruhe
    #define AERA_STATION_LATITUDE       49.094644 // Coordinates of KIT, Karlsruhe
    #define AERA_STATION_LONGITUDE      8.433219  // Coordinates of KIT, Karlsruhe
    #define AERA_STATION_ALTITUDE       115.      // Altitude of KIT, Karlsruhe
#endif 

/* difference between UTC and GPS time 315964800 = 
3600 sec/hour x 24 hours/day x (365 days/year x 8 years + 366 days/year x 2 years+ 5 days) - 16 Leap Seconds till 31.12.2013 */
#define AERA_UTC_TO_GPS  315964800 + 16             

// ======================== variable declarations =========================

int aeraSocketFD2, *aeraSocketFD, aeraSocketInit, aeraSocketReconnectTime; // variables for socket connection

// ======================== function declarations =========================

#ifdef __cplusplus
extern "C" {
#endif

//
// Functions exported from aera.c
//
uint64_t mstime(void);
double aeraCalcGroundDistance(double lat1, double lon1, double lat2, double lon2);
double aeraCalcCorrectedAltitude(double alt1, double alt2, double groundDistance);
double aeraCalcAzimuth(double lat1, double lon1, double lat2, double lon2);
void aera(struct modesMessage *mm);
void aeraWriteLogfile(char *message);
int aeraConnectToSocket(int *aeraSocketFD, char host[], int port);
int aeraWriteToSocket(int *aeraSocketFD, unsigned char *socketMessage, int length);

#ifdef __cplusplus
}
#endif

#endif // __AERA_H