/*!
* \file rtklib_conversions.cc
* \brief GNSS-SDR to RTKLIB data structures conversion functions
* \author 2017, Javier Arribas
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see .
*
* -------------------------------------------------------------------------
*/
#include "rtklib_conversions.h"
#include "rtklib_rtkcmn.h"
obsd_t insert_obs_to_rtklib(obsd_t& rtklib_obs, const Gnss_Synchro& gnss_synchro, int week, int band)
{
rtklib_obs.D[band] = gnss_synchro.Carrier_Doppler_hz;
rtklib_obs.P[band] = gnss_synchro.Pseudorange_m;
rtklib_obs.L[band] = gnss_synchro.Carrier_phase_rads / PI_2;
switch (band)
{
case 0:
rtklib_obs.code[band] = static_cast(CODE_L1C);
break;
case 1:
rtklib_obs.code[band] = static_cast(CODE_L2S);
break;
case 2:
rtklib_obs.code[band] = static_cast(CODE_L5X);
break;
}
double CN0_dB_Hz_est = gnss_synchro.CN0_dB_hz;
if (CN0_dB_Hz_est > 63.75) CN0_dB_Hz_est = 63.75;
if (CN0_dB_Hz_est < 0.0) CN0_dB_Hz_est = 0.0;
unsigned char CN0_dB_Hz = static_cast(std::round(CN0_dB_Hz_est / 0.25));
rtklib_obs.SNR[band] = CN0_dB_Hz;
//Galileo is the third satellite system for RTKLIB, so, add the required offset to discriminate Galileo ephemeris
switch (gnss_synchro.System)
{
case 'G':
rtklib_obs.sat = gnss_synchro.PRN;
break;
case 'E':
rtklib_obs.sat = gnss_synchro.PRN + NSATGPS + NSATGLO;
break;
case 'R':
rtklib_obs.sat = gnss_synchro.PRN + NSATGPS;
break;
default:
rtklib_obs.sat = gnss_synchro.PRN;
}
rtklib_obs.time = gpst2time(adjgpsweek(week), gnss_synchro.RX_time);
rtklib_obs.rcv = 1;
return rtklib_obs;
}
geph_t eph_to_rtklib(const Glonass_Gnav_Ephemeris& glonass_gnav_eph, const Glonass_Gnav_Utc_Model& gnav_clock_model)
{
double week, sec;
int adj_week;
geph_t rtklib_sat = {0, 0, 0, 0, 0, 0, {0, 0}, {0, 0}, {0.0, 0.0, 0.0}, {0.0, 0.0, 0.0}, {0.0, 0.0, 0.0}, 0.0, 0.0, 0.0};
rtklib_sat.sat = glonass_gnav_eph.i_satellite_slot_number + NSATGPS; /* satellite number */
rtklib_sat.iode = static_cast(glonass_gnav_eph.d_t_b); /* IODE (0-6 bit of tb field) */
rtklib_sat.frq = glonass_gnav_eph.i_satellite_freq_channel; /* satellite frequency number */
rtklib_sat.svh = glonass_gnav_eph.d_l3rd_n; /* satellite health*/
rtklib_sat.sva = static_cast(glonass_gnav_eph.d_F_T); /* satellite accuracy*/
rtklib_sat.age = static_cast(glonass_gnav_eph.d_E_n); /* satellite age*/
rtklib_sat.pos[0] = glonass_gnav_eph.d_Xn * 1000; /* satellite position (ecef) (m) */
rtklib_sat.pos[1] = glonass_gnav_eph.d_Yn * 1000; /* satellite position (ecef) (m) */
rtklib_sat.pos[2] = glonass_gnav_eph.d_Zn * 1000; /* satellite position (ecef) (m) */
rtklib_sat.vel[0] = glonass_gnav_eph.d_VXn * 1000; /* satellite velocity (ecef) (m/s) */
rtklib_sat.vel[1] = glonass_gnav_eph.d_VYn * 1000; /* satellite velocity (ecef) (m/s) */
rtklib_sat.vel[2] = glonass_gnav_eph.d_VZn * 1000; /* satellite velocity (ecef) (m/s) */
rtklib_sat.acc[0] = glonass_gnav_eph.d_AXn * 1000; /* satellite acceleration (ecef) (m/s^2) */
rtklib_sat.acc[1] = glonass_gnav_eph.d_AYn * 1000; /* satellite acceleration (ecef) (m/s^2) */
rtklib_sat.acc[2] = glonass_gnav_eph.d_AZn * 1000; /* satellite acceleration (ecef) (m/s^2) */
rtklib_sat.taun = glonass_gnav_eph.d_tau_n; /* SV clock bias (s) */
rtklib_sat.gamn = glonass_gnav_eph.d_gamma_n; /* SV relative freq bias */
rtklib_sat.age = static_cast(glonass_gnav_eph.d_Delta_tau_n); /* delay between L1 and L2 (s) */
// Time expressed in GPS Time but using RTKLib format
glonass_gnav_eph.glot_to_gpst(glonass_gnav_eph.d_t_b, gnav_clock_model.d_tau_c, gnav_clock_model.d_tau_gps, &week, &sec);
adj_week = adjgpsweek(static_cast(week));
rtklib_sat.toe = gpst2time(adj_week, sec);
// Time expressed in GPS Time but using RTKLib format
glonass_gnav_eph.glot_to_gpst(glonass_gnav_eph.d_t_k, gnav_clock_model.d_tau_c, gnav_clock_model.d_tau_gps, &week, &sec);
adj_week = adjgpsweek(static_cast(week));
rtklib_sat.tof = gpst2time(adj_week, sec);
return rtklib_sat;
}
eph_t eph_to_rtklib(const Galileo_Ephemeris& gal_eph)
{
eph_t rtklib_sat = {0, 0, 0, 0, 0, 0, 0, 0, {0, 0}, {0, 0}, {0, 0}, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, {}, {}, 0.0, 0.0 };
//Galileo is the third satellite system for RTKLIB, so, add the required offset to discriminate Galileo ephemeris
rtklib_sat.sat = gal_eph.i_satellite_PRN + NSATGPS + NSATGLO;
rtklib_sat.A = gal_eph.A_1 * gal_eph.A_1;
rtklib_sat.M0 = gal_eph.M0_1;
rtklib_sat.deln = gal_eph.delta_n_3;
rtklib_sat.OMG0 = gal_eph.OMEGA_0_2;
rtklib_sat.OMGd = gal_eph.OMEGA_dot_3;
rtklib_sat.omg = gal_eph.omega_2;
rtklib_sat.i0 = gal_eph.i_0_2;
rtklib_sat.idot = gal_eph.iDot_2;
rtklib_sat.e = gal_eph.e_1;
rtklib_sat.Adot = 0; //only in CNAV;
rtklib_sat.ndot = 0; //only in CNAV;
rtklib_sat.week = adjgpsweek(gal_eph.WN_5); /* week of tow */
rtklib_sat.cic = gal_eph.C_ic_4;
rtklib_sat.cis = gal_eph.C_is_4;
rtklib_sat.cuc = gal_eph.C_uc_3;
rtklib_sat.cus = gal_eph.C_us_3;
rtklib_sat.crc = gal_eph.C_rc_3;
rtklib_sat.crs = gal_eph.C_rs_3;
rtklib_sat.f0 = gal_eph.af0_4;
rtklib_sat.f1 = gal_eph.af1_4;
rtklib_sat.f2 = gal_eph.af2_4;
rtklib_sat.tgd[0] = gal_eph.BGD_E1E5a_5;
rtklib_sat.tgd[1] = gal_eph.BGD_E1E5b_5;
rtklib_sat.tgd[2] = 0;
rtklib_sat.tgd[3] = 0;
rtklib_sat.toes = gal_eph.t0e_1;
rtklib_sat.toc = gpst2time(rtklib_sat.week, gal_eph.t0c_4);
rtklib_sat.ttr = gpst2time(rtklib_sat.week, gal_eph.TOW_5);
/* adjustment for week handover */
double tow, toc;
tow = time2gpst(rtklib_sat.ttr, &rtklib_sat.week);
toc = time2gpst(rtklib_sat.toc, NULL);
if (rtklib_sat.toes < tow - 302400.0)
{
rtklib_sat.week++;
tow -= 604800.0;
}
else if (rtklib_sat.toes > tow + 302400.0)
{
rtklib_sat.week--;
tow += 604800.0;
}
rtklib_sat.toe = gpst2time(rtklib_sat.week, rtklib_sat.toes);
rtklib_sat.toc = gpst2time(rtklib_sat.week, toc);
rtklib_sat.ttr = gpst2time(rtklib_sat.week, tow);
return rtklib_sat;
}
eph_t eph_to_rtklib(const Gps_Ephemeris& gps_eph)
{
eph_t rtklib_sat = {0, 0, 0, 0, 0, 0, 0, 0, {0, 0}, {0, 0}, {0, 0}, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, {}, {}, 0.0, 0.0 };
rtklib_sat.sat = gps_eph.i_satellite_PRN;
rtklib_sat.A = gps_eph.d_sqrt_A * gps_eph.d_sqrt_A;
rtklib_sat.M0 = gps_eph.d_M_0;
rtklib_sat.deln = gps_eph.d_Delta_n;
rtklib_sat.OMG0 = gps_eph.d_OMEGA0;
rtklib_sat.OMGd = gps_eph.d_OMEGA_DOT;
rtklib_sat.omg = gps_eph.d_OMEGA;
rtklib_sat.i0 = gps_eph.d_i_0;
rtklib_sat.idot = gps_eph.d_IDOT;
rtklib_sat.e = gps_eph.d_e_eccentricity;
rtklib_sat.Adot = 0; //only in CNAV;
rtklib_sat.ndot = 0; //only in CNAV;
rtklib_sat.week = adjgpsweek(gps_eph.i_GPS_week); /* week of tow */
rtklib_sat.cic = gps_eph.d_Cic;
rtklib_sat.cis = gps_eph.d_Cis;
rtklib_sat.cuc = gps_eph.d_Cuc;
rtklib_sat.cus = gps_eph.d_Cus;
rtklib_sat.crc = gps_eph.d_Crc;
rtklib_sat.crs = gps_eph.d_Crs;
rtklib_sat.f0 = gps_eph.d_A_f0;
rtklib_sat.f1 = gps_eph.d_A_f1;
rtklib_sat.f2 = gps_eph.d_A_f2;
rtklib_sat.tgd[0] = gps_eph.d_TGD;
rtklib_sat.tgd[1] = 0.0;
rtklib_sat.tgd[2] = 0.0;
rtklib_sat.tgd[3] = 0.0;
rtklib_sat.toes = gps_eph.d_Toe;
rtklib_sat.toc = gpst2time(rtklib_sat.week, gps_eph.d_Toc);
rtklib_sat.ttr = gpst2time(rtklib_sat.week, gps_eph.d_TOW);
/* adjustment for week handover */
double tow, toc;
tow = time2gpst(rtklib_sat.ttr, &rtklib_sat.week);
toc = time2gpst(rtklib_sat.toc, NULL);
if (rtklib_sat.toes < tow - 302400.0)
{
rtklib_sat.week++;
tow -= 604800.0;
}
else if (rtklib_sat.toes > tow + 302400.0)
{
rtklib_sat.week--;
tow += 604800.0;
}
rtklib_sat.toe = gpst2time(rtklib_sat.week, rtklib_sat.toes);
rtklib_sat.toc = gpst2time(rtklib_sat.week, toc);
rtklib_sat.ttr = gpst2time(rtklib_sat.week, tow);
return rtklib_sat;
}
eph_t eph_to_rtklib(const Gps_CNAV_Ephemeris& gps_cnav_eph)
{
eph_t rtklib_sat = {0, 0, 0, 0, 0, 0, 0, 0, {0, 0}, {0, 0}, {0, 0}, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, {}, {}, 0.0, 0.0 };
rtklib_sat.sat = gps_cnav_eph.i_satellite_PRN;
const double A_REF = 26559710.0; // See IS-GPS-200H, pp. 170
rtklib_sat.A = A_REF + gps_cnav_eph.d_DELTA_A;
rtklib_sat.M0 = gps_cnav_eph.d_M_0;
rtklib_sat.deln = gps_cnav_eph.d_Delta_n;
rtklib_sat.OMG0 = gps_cnav_eph.d_OMEGA0;
// Compute the angle between the ascending node and the Greenwich meridian
const double OMEGA_DOT_REF = -2.6e-9; // semicircles / s, see IS-GPS-200H pp. 164
double d_OMEGA_DOT = OMEGA_DOT_REF * PI + gps_cnav_eph.d_DELTA_OMEGA_DOT;
rtklib_sat.OMGd = d_OMEGA_DOT;
rtklib_sat.omg = gps_cnav_eph.d_OMEGA;
rtklib_sat.i0 = gps_cnav_eph.d_i_0;
rtklib_sat.idot = gps_cnav_eph.d_IDOT;
rtklib_sat.e = gps_cnav_eph.d_e_eccentricity;
rtklib_sat.Adot = gps_cnav_eph.d_A_DOT; //only in CNAV;
rtklib_sat.ndot = gps_cnav_eph.d_DELTA_DOT_N; //only in CNAV;
rtklib_sat.week = adjgpsweek(gps_cnav_eph.i_GPS_week); /* week of tow */
rtklib_sat.cic = gps_cnav_eph.d_Cic;
rtklib_sat.cis = gps_cnav_eph.d_Cis;
rtklib_sat.cuc = gps_cnav_eph.d_Cuc;
rtklib_sat.cus = gps_cnav_eph.d_Cus;
rtklib_sat.crc = gps_cnav_eph.d_Crc;
rtklib_sat.crs = gps_cnav_eph.d_Crs;
rtklib_sat.f0 = gps_cnav_eph.d_A_f0;
rtklib_sat.f1 = gps_cnav_eph.d_A_f1;
rtklib_sat.f2 = gps_cnav_eph.d_A_f2;
rtklib_sat.tgd[0] = gps_cnav_eph.d_TGD;
rtklib_sat.tgd[1] = 0.0;
rtklib_sat.tgd[2] = 0.0;
rtklib_sat.tgd[3] = 0.0;
rtklib_sat.isc[0] = gps_cnav_eph.d_ISCL1;
rtklib_sat.isc[1] = gps_cnav_eph.d_ISCL2;
rtklib_sat.isc[2] = gps_cnav_eph.d_ISCL5I;
rtklib_sat.isc[3] = gps_cnav_eph.d_ISCL5Q;
rtklib_sat.toes = gps_cnav_eph.d_Toe1;
rtklib_sat.toc = gpst2time(rtklib_sat.week, gps_cnav_eph.d_Toc);
rtklib_sat.ttr = gpst2time(rtklib_sat.week, gps_cnav_eph.d_TOW);
/* adjustment for week handover */
double tow, toc;
tow = time2gpst(rtklib_sat.ttr, &rtklib_sat.week);
toc = time2gpst(rtklib_sat.toc, NULL);
if (rtklib_sat.toes < tow - 302400.0)
{
rtklib_sat.week++;
tow -= 604800.0;
}
else if (rtklib_sat.toes > tow + 302400.0)
{
rtklib_sat.week--;
tow += 604800.0;
}
rtklib_sat.toe = gpst2time(rtklib_sat.week, rtklib_sat.toes);
rtklib_sat.toc = gpst2time(rtklib_sat.week, toc);
rtklib_sat.ttr = gpst2time(rtklib_sat.week, tow);
return rtklib_sat;
}