mirror of https://github.com/gnss-sdr/gnss-sdr
217 lines
7.7 KiB
C++
217 lines
7.7 KiB
C++
/*!
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* \file glonass_gnav_navigation_message.h
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* \brief Interface of a GLONASS GNAV Data message decoder as described in GLONASS ICD (Edition 5.1)
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* \note Code added as part of GSoC 2017 program
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* \author Damian Miralles, 2017. dmiralles2009(at)gmail.com
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* \see <a href="http://russianspacesystems.ru/wp-content/uploads/2016/08/ICD_GLONASS_eng_v5.1.pdf">GLONASS ICD</a>
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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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_GLONASS_GNAV_NAVIGATION_MESSAGE_H
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#define GNSS_SDR_GLONASS_GNAV_NAVIGATION_MESSAGE_H
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#include "GLONASS_L1_L2_CA.h"
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#include "glonass_gnav_almanac.h"
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#include "glonass_gnav_ephemeris.h"
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#include "glonass_gnav_utc_model.h"
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#include <bitset>
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#include <cstdint>
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#include <string>
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#include <utility> // for pair
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#include <vector> // for vector
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/*!
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* \brief This class decodes a GLONASS GNAV Data message as described in GLONASS ICD (Edition 5.1)
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* \note Code added as part of GSoC 2017 program
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* \see <a href="http://russianspacesystems.ru/wp-content/uploads/2016/08/ICD_GLONASS_eng_v5.1.pdf">GLONASS ICD</a>
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*/
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class Glonass_Gnav_Navigation_Message
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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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Glonass_Gnav_Navigation_Message();
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/*!
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* \brief Compute CRC for GLONASS GNAV strings
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* \param bits Bits of the string message where to compute CRC
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*/
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bool CRC_test(std::bitset<GLONASS_GNAV_STRING_BITS> bits) const;
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/*!
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* \brief Computes the frame number being decoded given the satellite slot number
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* \param satellite_slot_number [in] Satellite slot number identifier
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* \returns Frame number being decoded, 0 if operation was not successful.
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*/
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uint32_t get_frame_number(uint32_t satellite_slot_number);
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/*!
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* \brief Obtain a GLONASS GNAV SV Ephemeris class filled with current SV data
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*/
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Glonass_Gnav_Ephemeris get_ephemeris() const
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{
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return gnav_ephemeris;
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}
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/*!
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* \brief Obtain a GLONASS GNAV UTC model parameters class filled with current SV data
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*/
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inline Glonass_Gnav_Utc_Model get_utc_model() const
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{
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return gnav_utc_model;
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}
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/*!
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* \brief Returns a Glonass_Gnav_Almanac object filled with the latest navigation data received
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* \param satellite_slot_number Slot number identifier for the satellite
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* \returns Returns the Glonass_Gnav_Almanac object for the input slot number
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*/
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Glonass_Gnav_Almanac get_almanac(uint32_t satellite_slot_number) const;
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/*!
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* \brief Returns true if a new Glonass_Gnav_Ephemeris object has arrived.
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*/
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bool have_new_ephemeris();
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/*!
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* \brief Returns true if new Glonass_Gnav_Utc_Model object has arrived
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*/
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bool have_new_utc_model();
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/*!
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* \brief Returns true if new Glonass_Gnav_Almanac object has arrived.
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*/
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bool have_new_almanac();
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/*!
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* \brief Decodes the GLONASS GNAV string
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* \param frame_string [in] is the string message within the parsed frame
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* \returns Returns the ID of the decoded string
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*/
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int32_t string_decoder(const std::string& frame_string);
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inline bool get_flag_CRC_test() const
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{
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return flag_CRC_test;
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}
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inline void set_rf_link(int32_t rf_link)
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{
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gnav_ephemeris.i_satellite_freq_channel = rf_link;
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}
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inline uint32_t get_alm_satellite_slot_number() const
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{
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return i_alm_satellite_slot_number;
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}
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inline bool get_flag_update_slot_number() const
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{
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return flag_update_slot_number;
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}
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inline void set_flag_update_slot_number(bool flag_slot)
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{
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flag_update_slot_number = flag_slot;
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}
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inline bool get_flag_TOW_new() const
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{
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return flag_TOW_new;
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}
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inline void set_flag_TOW_new(bool tow_new)
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{
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flag_TOW_new = tow_new;
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}
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inline bool is_flag_TOW_set() const
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{
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return flag_TOW_set;
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}
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inline void set_flag_ephemeris_str_1(bool ephemeris_str_1)
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{
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flag_ephemeris_str_1 = ephemeris_str_1;
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}
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inline void set_flag_ephemeris_str_2(bool ephemeris_str_2)
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{
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flag_ephemeris_str_2 = ephemeris_str_2;
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}
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inline void set_flag_ephemeris_str_3(bool ephemeris_str_3)
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{
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flag_ephemeris_str_3 = ephemeris_str_3;
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}
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inline void set_flag_ephemeris_str_4(bool ephemeris_str_4)
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{
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flag_ephemeris_str_4 = ephemeris_str_4;
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}
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private:
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uint64_t read_navigation_unsigned(std::bitset<GLONASS_GNAV_STRING_BITS> bits, const std::vector<std::pair<int32_t, int32_t>>& parameter) const;
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int64_t read_navigation_signed(std::bitset<GLONASS_GNAV_STRING_BITS> bits, const std::vector<std::pair<int32_t, int32_t>>& parameter) const;
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bool read_navigation_bool(std::bitset<GLONASS_GNAV_STRING_BITS> bits, const std::vector<std::pair<int32_t, int32_t>>& parameter) const;
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Glonass_Gnav_Ephemeris gnav_ephemeris{}; // Ephemeris information decoded
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Glonass_Gnav_Utc_Model gnav_utc_model{}; // UTC model information
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Glonass_Gnav_Almanac gnav_almanac[GLONASS_CA_NBR_SATS]{}; // Almanac information for all 24 satellites
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std::map<int, std::string> satelliteBlock; // Map that stores to which block the PRN belongs
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double d_previous_tb{}; // Previous iode for the Glonass_Gnav_Ephemeris object. Used to determine when new data arrives
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double d_previous_Na[GLONASS_CA_NBR_SATS]{}; // Previous time for almanac of the Glonass_Gnav_Almanac object
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uint32_t d_frame_ID{};
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uint32_t d_string_ID{};
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uint32_t i_alm_satellite_slot_number{}; // SV Orbit Slot Number
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bool flag_CRC_test{};
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bool flag_update_slot_number{};
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// Ephemeris Flags and control variables
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bool flag_all_ephemeris{}; // Flag indicating that all strings containing ephemeris have been received
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bool flag_ephemeris_str_1{}; // Flag indicating that ephemeris 1/4 (string 1) have been received
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bool flag_ephemeris_str_2{}; // Flag indicating that ephemeris 2/4 (string 2) have been received
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bool flag_ephemeris_str_3{}; // Flag indicating that ephemeris 3/4 (string 3) have been received
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bool flag_ephemeris_str_4{}; // Flag indicating that ephemeris 4/4 (string 4) have been received
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// Almanac Flags
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bool flag_almanac_str_6{}; // Flag indicating that almanac of string 6 have been received
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bool flag_almanac_str_7{}; // Flag indicating that almanac of string 7 have been received
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bool flag_almanac_str_8{}; // Flag indicating that almanac of string 8 have been received
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bool flag_almanac_str_9{}; // Flag indicating that almanac of string 9 have been received
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bool flag_almanac_str_10{}; // Flag indicating that almanac of string 10 have been received
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bool flag_almanac_str_11{}; // Flag indicating that almanac of string 11 have been received
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bool flag_almanac_str_12{}; // Flag indicating that almanac of string 12 have been received
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bool flag_almanac_str_13{}; // Flag indicating that almanac of string 13 have been received
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bool flag_almanac_str_14{}; // Flag indicating that almanac of string 14 have been received
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bool flag_almanac_str_15{}; // Flag indicating that almanac of string 15 have been received
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// UTC and System Clocks Flags
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bool flag_utc_model_str_5{}; // Clock info send in string 5 of navigation data
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bool flag_TOW_set{}; // Flag indicating when the TOW has been set
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bool flag_TOW_new{}; // Flag indicating when a new TOW has been computed
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};
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#endif
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