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Code Issues Releases Wiki Activity

GPS L1 C/A symbol TOW fix

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This commit is contained in:
Javier Arribas 2018-06-05 18:21:51 +02:00
parent 9a5b426059
commit ff7e03a35d
2 changed files with 5 additions and 5 deletions
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8
src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.cc
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@ -90,7 +90,7 @@ gps_l1_ca_telemetry_decoder_cc::gps_l1_ca_telemetry_decoder_cc(
d_GPS_frame_4bytes = 0; d_GPS_frame_4bytes = 0;
d_prev_GPS_frame_4bytes = 0; d_prev_GPS_frame_4bytes = 0;
d_flag_parity = false; d_flag_parity = false;
d_TOW_at_Preamble = 0.0; d_TOW_at_Preamble_ms = 0;
flag_TOW_set = false; flag_TOW_set = false;
d_average_count = 0; d_average_count = 0;
d_flag_preamble = false; d_flag_preamble = false;
@ -395,8 +395,8 @@ int gps_l1_ca_telemetry_decoder_cc::general_work(int noutput_items __attribute__
//2. Add the telemetry decoder information //2. Add the telemetry decoder information
if (this->d_flag_preamble == true and d_flag_new_tow_available == true) if (this->d_flag_preamble == true and d_flag_new_tow_available == true)
{ {
d_TOW_at_Preamble = d_GPS_FSM.d_nav.d_TOW + 2.0 * GPS_L1_CA_CODE_PERIOD + GPS_CA_PREAMBLE_DURATION_S; d_TOW_at_current_symbol_ms = static_cast<unsigned int>(d_GPS_FSM.d_nav.d_TOW) * 1000 + GPS_L1_CA_CODE_PERIOD_MS + GPS_CA_PREAMBLE_DURATION_MS;
d_TOW_at_current_symbol_ms = static_cast<unsigned int>(d_GPS_FSM.d_nav.d_TOW) * 1000 + 161; d_TOW_at_Preamble_ms = d_TOW_at_current_symbol_ms;
flag_TOW_set = true; flag_TOW_set = true;
d_flag_new_tow_available = false; d_flag_new_tow_available = false;
} }
@ -425,7 +425,7 @@ int gps_l1_ca_telemetry_decoder_cc::general_work(int noutput_items __attribute__
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double)); d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
tmp_ulong_int = current_symbol.Tracking_sample_counter; tmp_ulong_int = current_symbol.Tracking_sample_counter;
d_dump_file.write(reinterpret_cast<char *>(&tmp_ulong_int), sizeof(unsigned long int)); d_dump_file.write(reinterpret_cast<char *>(&tmp_ulong_int), sizeof(unsigned long int));
tmp_double = d_TOW_at_Preamble; tmp_double = static_cast<double>(d_TOW_at_Preamble_ms) * 1000.0;
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double)); d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
} }
catch (const std::ifstream::failure &e) catch (const std::ifstream::failure &e)

2
src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.h
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@ -111,7 +111,7 @@ private:
unsigned long int d_preamble_time_samples; unsigned long int d_preamble_time_samples;
double d_TOW_at_Preamble; unsigned int d_TOW_at_Preamble_ms;
unsigned int d_TOW_at_current_symbol_ms; unsigned int d_TOW_at_current_symbol_ms;
bool flag_TOW_set; bool flag_TOW_set;