mirror of https://github.com/gnss-sdr/gnss-sdr
203 lines
12 KiB
C++
203 lines
12 KiB
C++
/*!
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* \file beidou_dnav_ephemeris.h
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* \brief Interface of a BEIDOU EPHEMERIS storage
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* \author Sergi Segura, 2018. sergi.segura.munoz(at)gmail.com
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_BEIDOU_DNAV_EPHEMERIS_H
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#define GNSS_SDR_BEIDOU_DNAV_EPHEMERIS_H
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#include <boost/serialization/nvp.hpp>
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#include <map>
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#include <string>
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/** \addtogroup Core
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* \{ */
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/** \addtogroup System_Parameters
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* \{ */
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/*!
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* \brief This class is a storage and orbital model functions for the GPS SV ephemeris data as described in
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* BeiDou Navigation Satellite System Signal In Space Interface Control Document
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* Open Service Signal B1I (Version 3.0)
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*
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* See http://en.beidou.gov.cn/SYSTEMS/Officialdocument/201902/P020190227601370045731.pdf
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*/
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class Beidou_Dnav_Ephemeris
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{
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public:
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/*!
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* Default constructor
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*/
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Beidou_Dnav_Ephemeris();
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/*!
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* \brief Compute the ECEF SV coordinates and ECEF velocity
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* Implementation of Table 20-IV (IS-GPS-200L)
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* and compute the clock bias term including relativistic effect (return value)
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*/
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double satellitePosition(double transmitTime);
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/*!
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* \brief Sets (\a d_satClkDrift)and returns the clock drift in seconds according to the User Algorithm for SV Clock Correction
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* (IS-GPS-200L, 20.3.3.3.3.1)
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*/
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double sv_clock_drift(double transmitTime);
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/*!
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* \brief Sets (\a d_dtr) and returns the clock relativistic correction term in seconds according to the User Algorithm for SV Clock Correction
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* (IS-GPS-200L, 20.3.3.3.3.1)
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*/
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double sv_clock_relativistic_term(double transmitTime);
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unsigned int i_satellite_PRN{}; //!< SV PRN NUMBER
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double d_TOW{}; //!< Time of BEIDOU Week of the ephemeris set (taken from subframes TOW) [s]
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double d_Crs{}; //!< Amplitude of the Sine Harmonic Correction Term to the Orbit Radius [m]
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double d_Delta_n{}; //!< Mean Motion Difference From Computed Value [semi-circles/s]
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double d_M_0{}; //!< Mean Anomaly at Reference Time [semi-circles]
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double d_Cuc{}; //!< Amplitude of the Cosine Harmonic Correction Term to the Argument of Latitude [rad]
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double d_eccentricity{}; //!< Eccentricity [dimensionless]
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double d_Cus{}; //!< Amplitude of the Sine Harmonic Correction Term to the Argument of Latitude [rad]
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double d_sqrt_A{}; //!< Square Root of the Semi-Major Axis [sqrt(m)]
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double d_Toe{}; //!< Ephemeris data reference time of week (Ref. 20.3.3.4.3 IS-GPS-200L) [s]
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double d_Toc{}; //!< clock data reference time (Ref. 20.3.3.3.3.1 IS-GPS-200L) [s]
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double d_Cic{}; //!< Amplitude of the Cosine Harmonic Correction Term to the Angle of Inclination [rad]
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double d_OMEGA0{}; //!< Longitude of Ascending Node of Orbit Plane at Weekly Epoch [semi-circles]
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double d_Cis{}; //!< Amplitude of the Sine Harmonic Correction Term to the Angle of Inclination [rad]
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double d_i_0{}; //!< Inclination Angle at Reference Time [semi-circles]
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double d_Crc{}; //!< Amplitude of the Cosine Harmonic Correction Term to the Orbit Radius [m]
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double d_OMEGA{}; //!< Argument of Perigee [semi-cicles]
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double d_OMEGA_DOT{}; //!< Rate of Right Ascension [semi-circles/s]
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double d_IDOT{}; //!< Rate of Inclination Angle [semi-circles/s]
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int i_BEIDOU_week{}; //!< BEIDOU week number, aka WN [week]
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int i_SV_accuracy{}; //!< User Range Accuracy (URA) index of the SV (reference paragraph 6.2.1) for the standard positioning service user (Ref 20.3.3.3.1.3 IS-GPS-200L)
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int i_SV_health{};
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double d_TGD1{}; //!< Estimated Group Delay Differential on B1I [s]
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double d_TGD2{}; //!< Estimated Group Delay Differential on B2I [s]
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double d_AODC{}; //!< Age of Data, Clock
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double d_AODE{}; //!< Age of Data, Ephemeris
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int i_AODO{}; //!< Age of Data Offset (AODO) term for the navigation message correction table (NMCT) contained in subframe 4 (reference paragraph 20.3.3.5.1.9) [s]
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int i_sig_type{}; //!< BDS: data source (0:unknown,1:B1I,2:B1Q,3:B2I,4:B2Q,5:B3I,6:B3Q) */
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int i_nav_type{}; //!< BDS: nav type (0:unknown,1:IGSO/MEO,2:GEO) */
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bool b_fit_interval_flag{}; //!< indicates the curve-fit interval used by the CS (Block II/IIA/IIR/IIR-M/IIF) and SS (Block IIIA) in determining the ephemeris parameters, as follows: 0 = 4 hours, 1 = greater than 4 hours.
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double d_spare1{};
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double d_spare2{};
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double d_A_f0{}; //!< Coefficient 0 of code phase offset model [s]
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double d_A_f1{}; //!< Coefficient 1 of code phase offset model [s/s]
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double d_A_f2{}; //!< Coefficient 2 of code phase offset model [s/s^2]
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/*! \brief If true, enhanced level of integrity assurance.
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*
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* If false, indicates that the conveying signal is provided with the legacy level of integrity assurance.
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* That is, the probability that the instantaneous URE of the conveying signal exceeds 4.42 times the upper bound
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* value of the current broadcast URA index, for more than 5.2 seconds, without an accompanying alert, is less
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* than 1E-5 per hour. If true, indicates that the conveying signal is provided with an enhanced level of
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* integrity assurance. That is, the probability that the instantaneous URE of the conveying signal exceeds 5.73
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* times the upper bound value of the current broadcast URA index, for more than 5.2 seconds, without an
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* accompanying alert, is less than 1E-8 per hour.
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*/
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bool b_integrity_status_flag{};
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bool b_alert_flag{}; //!< If true, indicates that the SV URA may be worse than indicated in d_SV_accuracy, use that SV at our own risk.
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bool b_antispoofing_flag{}; //!< If true, the AntiSpoofing mode is ON in that SV
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// clock terms derived from ephemeris data
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double d_satClkDrift{}; //!< GPS clock error
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double d_dtr{}; //!< relativistic clock correction term
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// satellite positions
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double d_satpos_X{}; //!< Earth-fixed coordinate x of the satellite [m]. Intersection of the IERS Reference Meridian (IRM) and the plane passing through the origin and normal to the Z-axis.
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double d_satpos_Y{}; //!< Earth-fixed coordinate y of the satellite [m]. Completes a right-handed, Earth-Centered, Earth-Fixed orthogonal coordinate system.
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double d_satpos_Z{}; //!< Earth-fixed coordinate z of the satellite [m]. The direction of the IERS (International Earth Rotation and Reference Systems Service) Reference Pole (IRP).
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// Satellite velocity
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double d_satvel_X{}; //!< Earth-fixed velocity coordinate x of the satellite [m]
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double d_satvel_Y{}; //!< Earth-fixed velocity coordinate y of the satellite [m]
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double d_satvel_Z{}; //!< Earth-fixed velocity coordinate z of the satellite [m]
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std::map<int, std::string> satelliteBlock; //!< Map that stores to which block the PRN belongs
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template <class Archive>
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/*!
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* \brief Serialize is a boost standard method to be called by the boost XML serialization. Here is used to save the ephemeris data on disk file.
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*/
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void serialize(Archive& archive, const unsigned int version)
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{
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using boost::serialization::make_nvp;
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if (version)
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{
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};
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archive& make_nvp("i_satellite_PRN", i_satellite_PRN); // SV PRN NUMBER
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archive& make_nvp("d_TOW", d_TOW); //!< Time of GPS Week of the ephemeris set (taken from subframes TOW) [s]
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archive& make_nvp("d_AODE", d_AODE);
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archive& make_nvp("d_Crs", d_Crs); //!< Amplitude of the Sine Harmonic Correction Term to the Orbit Radius [m]
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archive& make_nvp("d_Delta_n", d_Delta_n); //!< Mean Motion Difference From Computed Value [semi-circles/s]
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archive& make_nvp("d_M_0", d_M_0); //!< Mean Anomaly at Reference Time [semi-circles]
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archive& make_nvp("d_Cuc", d_Cuc); //!< Amplitude of the Cosine Harmonic Correction Term to the Argument of Latitude [rad]
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archive& make_nvp("d_e_eccentricity", d_eccentricity); //!< Eccentricity [dimensionless]
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archive& make_nvp("d_Cus", d_Cus); //!< Amplitude of the Sine Harmonic Correction Term to the Argument of Latitude [rad]
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archive& make_nvp("d_sqrt_A", d_sqrt_A); //!< Square Root of the Semi-Major Axis [sqrt(m)]
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archive& make_nvp("d_Toe", d_Toe); //!< Ephemeris data reference time of week (Ref. 20.3.3.4.3 IS-GPS-200L) [s]
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archive& make_nvp("d_Toc", d_Toe); //!< clock data reference time (Ref. 20.3.3.3.3.1 IS-GPS-200L) [s]
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archive& make_nvp("d_Cic", d_Cic); //!< Amplitude of the Cosine Harmonic Correction Term to the Angle of Inclination [rad]
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archive& make_nvp("d_OMEGA0", d_OMEGA0); //!< Longitude of Ascending Node of Orbit Plane at Weekly Epoch [semi-circles]
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archive& make_nvp("d_Cis", d_Cis); //!< Amplitude of the Sine Harmonic Correction Term to the Angle of Inclination [rad]
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archive& make_nvp("d_i_0", d_i_0); //!< Inclination Angle at Reference Time [semi-circles]
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archive& make_nvp("d_Crc", d_Crc); //!< Amplitude of the Cosine Harmonic Correction Term to the Orbit Radius [m]
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archive& make_nvp("d_OMEGA", d_OMEGA); //!< Argument of Perigee [semi-cicles]
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archive& make_nvp("d_OMEGA_DOT", d_OMEGA_DOT); //!< Rate of Right Ascension [semi-circles/s]
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archive& make_nvp("d_IDOT", d_IDOT); //!< Rate of Inclination Angle [semi-circles/s]
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archive& make_nvp("i_BEIDOU_week", i_BEIDOU_week); //!< GPS week number, aka WN [week]
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archive& make_nvp("i_SV_accuracy", i_SV_accuracy); //!< User Range Accuracy (URA) index of the SV (reference paragraph 6.2.1) for the standard positioning service user (Ref 20.3.3.3.1.3 IS-GPS-200L)
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archive& make_nvp("i_SV_health", i_SV_health);
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archive& make_nvp("d_AODC", d_AODC); //!< Issue of Data, Clock
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archive& make_nvp("d_TGD1", d_TGD1); //!< Estimated Group Delay Differential: L1-L2 correction term only for the benefit of "L1 P(Y)" or "L2 P(Y)" s users [s]
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archive& make_nvp("d_TGD2", d_TGD2); //!< Estimated Group Delay Differential: L1-L2 correction term only for the benefit of "L1 P(Y)" or "L2 P(Y)" s users [s]
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archive& make_nvp("i_AODO", i_AODO); //!< Age of Data Offset (AODO) term for the navigation message correction table (NMCT) contained in subframe 4 (reference paragraph 20.3.3.5.1.9) [s]
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archive& make_nvp("b_fit_interval_flag", b_fit_interval_flag); //!< indicates the curve-fit interval used by the CS (Block II/IIA/IIR/IIR-M/IIF) and SS (Block IIIA) in determining the ephemeris parameters, as follows: 0 = 4 hours, 1 = greater than 4 hours.
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archive& make_nvp("d_spare1", d_spare1);
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archive& make_nvp("d_spare2", d_spare2);
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archive& make_nvp("d_A_f0", d_A_f0); //!< Coefficient 0 of code phase offset model [s]
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archive& make_nvp("d_A_f1", d_A_f1); //!< Coefficient 1 of code phase offset model [s/s]
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archive& make_nvp("d_A_f2", d_A_f2); //!< Coefficient 2 of code phase offset model [s/s^2]
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archive& make_nvp("b_integrity_status_flag", b_integrity_status_flag);
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archive& make_nvp("b_alert_flag", b_alert_flag); //!< If true, indicates that the SV URA may be worse than indicated in d_SV_accuracy, use that SV at our own risk.
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archive& make_nvp("b_antispoofing_flag", b_antispoofing_flag); //!< If true, the AntiSpoofing mode is ON in that SV
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}
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private:
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/*
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* Accounts for the beginning or end of week crossover
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*
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* See paragraph 20.3.3.3.3.1 (IS-GPS-200L)
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* \param[in] - time in seconds
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* \param[out] - corrected time, in seconds
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*/
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double check_t(double time);
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};
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/** \} */
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/** \} */
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#endif // GNSS_SDR_BEIDOU_DNAV_EPHEMERIS_H
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