syntax = "proto3";

package gnss_sdr;

message GnssSynchro {
   string system = 1;
   string signal = 2;

   uint32 prn = 3;
   int32 channel_id = 4;

   double acq_delay_samples = 5;
   double acq_doppler_hz = 6;
   uint64 acq_samplestamp_samples = 7;
   uint32 acq_doppler_step = 8;
   bool flag_valid_acquisition = 9;

   int64 fs = 10;
   double prompt_i = 11;
   double prompt_q = 12;
   double cn0_db_hz = 13;
   double carrier_doppler_hz = 14;
   double carrier_phase_rads = 15;
   double code_phase_samples = 16;
   uint64 tracking_sample_counter = 17;
   bool flag_valid_symbol_output = 18;
   int32 correlation_length_ms = 19;

   bool flag_valid_word = 20;
   uint32 tow_at_current_symbol_ms = 21;

   double pseudorange_m = 22;
   double rx_time = 23;
   bool flag_valid_pseudorange = 24;
   double interp_tow_ms = 25;
}

message Observables {
  repeated GnssSynchro observable = 1;
}