GNSS-SDR  0.0.17
An Open Source GNSS Software Defined Receiver
Galileo_CNAV.h
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1 /*!
2  * \file Galileo_CNAV.h
3  * \brief Galileo CNAV mesage constants. Data from:
4  * Galileo High Accuracy Service E6-B Signal-In-Space Message Specification v1.2
5  * (April 2020).
6  * \author Carles Fernandez-Prades, 2020. cfernandez(at)cttc.es
7  *
8  *
9  * -----------------------------------------------------------------------------
10  *
11  * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
12  * This file is part of GNSS-SDR.
13  *
14  * Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
15  * SPDX-License-Identifier: GPL-3.0-or-later
16  *
17  * -----------------------------------------------------------------------------
18  */
19 
20 #ifndef GNSS_SDR_GALILEO_CNAV_H
21 #define GNSS_SDR_GALILEO_CNAV_H
22 
23 #include <cstddef>
24 #include <cstdint>
25 #include <utility>
26 
27 /** \addtogroup Core
28  * \{ */
29 /** \addtogroup System_Parameters
30  * \{ */
31 
32 // Galileo CNAV message structure
33 constexpr int32_t GALILEO_CNAV_SYMBOLS_PER_PAGE = 1000; //!< Total numer of symbols per HAS page including the sync pattern
34 constexpr int32_t GALILEO_CNAV_PREAMBLE_PERIOD_SYMBOLS = 1000;
35 constexpr int32_t GALILEO_CNAV_PAGE_MS = 1; //!< Duration in ms of a CNAV page
36 constexpr int32_t GALILEO_CNAV_INTERLEAVER_ROWS = 8;
37 constexpr int32_t GALILEO_CNAV_INTERLEAVER_COLS = 123;
38 constexpr int32_t GALILEO_CNAV_TELEMETRY_RATE_BITS_SECOND = 1000; // bps
39 constexpr int32_t GALILEO_CNAV_HAS_PAGE_DATA_BITS = 448;
40 constexpr int32_t GALILEO_CNAV_PAGE_RESERVED_BITS = 14;
41 constexpr int32_t GALILEO_CNAV_BITS_FOR_CRC = GALILEO_CNAV_HAS_PAGE_DATA_BITS + GALILEO_CNAV_PAGE_RESERVED_BITS; // 462
42 constexpr int32_t GALILEO_CNAV_BYTES_FOR_CRC = 58;
43 constexpr int32_t GALILEO_CNAV_CRC_LENGTH = 24;
44 constexpr int32_t GALILEO_CNAV_MESSAGE_BITS_PER_PAGE = 424;
45 constexpr int32_t GALILEO_CNAV_PAGE_HEADER_BITS = 24;
46 constexpr int32_t GALILEO_CNAV_PREAMBLE_LENGTH_BITS = 16;
47 constexpr int32_t GALILEO_CNAV_MAX_NUMBER_SYMBOLS_ENCODED_BLOCK = 255;
48 constexpr int32_t GALILEO_CNAV_MT1_HEADER_BITS = 32;
49 constexpr int32_t GALILEO_CNAV_OCTETS_IN_SUBPAGE = 53;
50 constexpr int32_t GALILEO_CNAV_INFORMATION_VECTOR_LENGTH = 32;
51 
52 constexpr char GALILEO_CNAV_PREAMBLE[17] = "1011011101110000";
53 
54 // Galileo HAS message field lengths
55 constexpr size_t HAS_MSG_NSYS_LENGTH = 4;
56 constexpr size_t HAS_MSG_ID_MASK_LENGTH = 4;
57 constexpr size_t HAS_MSG_SATELLITE_MASK_LENGTH = 40;
58 constexpr size_t HAS_MSG_SIGNAL_MASK_LENGTH = 16;
59 constexpr size_t HAS_MSG_NAV_MESSAGE_LENGTH = 3;
60 constexpr size_t HAS_MSG_MASK_RESERVED_LENGTH = 6;
61 constexpr size_t HAS_MSG_VALIDITY_INDEX_LENGTH = 4;
62 constexpr size_t HAS_MSG_IOD_GPS_LENGTH = 8;
63 constexpr size_t HAS_MSG_IOD_GAL_LENGTH = 10;
64 constexpr size_t HAS_MSG_DELTA_RADIAL_LENGTH = 14;
65 constexpr size_t HAS_MSG_DELTA_ALONG_TRACK_LENGTH = 12;
66 constexpr size_t HAS_MSG_DELTA_CROSS_TRACK_LENGTH = 12;
67 constexpr size_t HAS_MSG_DELTA_CLOCK_C0_MULTIPLIER_LENGTH = 2;
68 constexpr size_t HAS_MSG_DELTA_CLOCK_C0_LENGTH = 14;
69 constexpr size_t HAS_MSG_NSYSPRIME_LENGTH = 4;
70 constexpr size_t HAS_MSG_ID_CLOCK_SUBSET_LENGTH = 4;
71 constexpr size_t HAS_MSG_DELTA_CLOCK_MULTIPLIER_SUBSET_LENGTH = 2;
72 constexpr size_t HAS_MSG_DELTA_CLOCK_C0_SUBSET_LENGTH = 13;
73 constexpr size_t HAS_MSG_CODE_BIAS_LENGTH = 11;
74 constexpr size_t HAS_MSG_PHASE_BIAS_LENGTH = 11;
75 constexpr size_t HAS_MSG_PHASE_DISCONTINUITY_INDICATOR_LENGTH = 2;
76 constexpr size_t HAS_MSG_URA_LENGTH = 2;
77 
78 constexpr int32_t HAS_MSG_NUMBER_MASK_IDS = 32;
79 constexpr int32_t HAS_MSG_NUMBER_GNSS_IDS = 16;
80 constexpr int32_t HAS_MSG_NUMBER_MESSAGE_IDS = 32;
81 constexpr int32_t HAS_MSG_NUMBER_SATELLITE_IDS = 40;
82 constexpr int32_t HAS_MSG_NUMBER_SIGNAL_MASKS = 16;
83 
84 constexpr float HAS_MSG_DELTA_RADIAL_SCALE_FACTOR = 0.0025;
85 constexpr float HAS_MSG_DELTA_ALONG_TRACK_SCALE_FACTOR = 0.008;
86 constexpr float HAS_MSG_DELTA_CROSS_TRACK_SCALE_FACTOR = 0.008;
87 constexpr float HAS_MSG_DELTA_CLOCK_SCALE_FACTOR = 0.0025;
88 constexpr float HAS_MSG_CODE_BIAS_SCALE_FACTOR = 0.02;
89 constexpr float HAS_MSG_PHASE_BIAS_SCALE_FACTOR = 0.01;
90 
91 constexpr uint16_t HAS_MSG_NUMBER_MAX_TOH = 3599;
92 
93 constexpr uint8_t HAS_MSG_GPS_SYSTEM = 0; // Table 8 ICD v1.2
94 constexpr uint8_t HAS_MSG_GALILEO_SYSTEM = 2; // Table 8 ICD v1.2
95 constexpr uint8_t HAS_MSG_WRONG_SYSTEM = 255;
96 
97 const std::pair<int32_t, int32_t> GALILEO_HAS_STATUS({1, 2});
98 const std::pair<int32_t, int32_t> GALILEO_HAS_RESERVED({3, 2});
99 const std::pair<int32_t, int32_t> GALILEO_HAS_MESSAGE_TYPE({5, 2});
100 const std::pair<int32_t, int32_t> GALILEO_HAS_MESSAGE_ID({7, 5});
101 const std::pair<int32_t, int32_t> GALILEO_HAS_MESSAGE_SIZE({12, 5});
102 const std::pair<int32_t, int32_t> GALILEO_HAS_MESSAGE_PAGE_ID({17, 8});
103 
104 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_TOH({1, 12});
105 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_MASK_FLAG({13, 1});
106 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_ORBIT_CORRECTION_FLAG({14, 1});
107 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_CLOCK_FULLSET_FLAG({15, 1});
108 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_CLOCK_SUBSET_FLAG({16, 1});
109 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_CODE_BIAS_FLAG({17, 1});
110 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_PHASE_BIAS_FLAG({18, 1});
111 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_URA_FLAG({19, 1});
112 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_MASK_ID({23, 5});
113 const std::pair<int32_t, int32_t> GALILEO_MT1_HEADER_IOD_ID({28, 5});
114 
115 
116 /** \} */
117 /** \} */
118 #endif // GNSS_SDR_GALILEO_CNAV_H
GALILEO_CNAV_SYMBOLS_PER_PAGE
constexpr int32_t GALILEO_CNAV_SYMBOLS_PER_PAGE
Total numer of symbols per HAS page including the sync pattern.
Definition: Galileo_CNAV.h:33
GALILEO_CNAV_PAGE_MS
constexpr int32_t GALILEO_CNAV_PAGE_MS
Duration in ms of a CNAV page.
Definition: Galileo_CNAV.h:35
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