GPS_L1_CA.h File Reference

Defines system parameters for GPS L1 C/A signal and NAV data. More...

#include "MATH_CONSTANTS.h"
#include "gnss_frequencies.h"
#include <cstdint>
#include <utility>
#include <vector>

Go to the source code of this file.

Functions
const std::vector< std::pair< int32_t, int32_t > >	TOW ({{31, 17}})
const std::vector< std::pair< int32_t, int32_t > >	INTEGRITY_STATUS_FLAG ({{23, 1}})
const std::vector< std::pair< int32_t, int32_t > >	ALERT_FLAG ({{48, 1}})
const std::vector< std::pair< int32_t, int32_t > >	ANTI_SPOOFING_FLAG ({{49, 1}})
const std::vector< std::pair< int32_t, int32_t > >	SUBFRAME_ID ({{50, 3}})
const std::vector< std::pair< int32_t, int32_t > >	GPS_WEEK ({{61, 10}})
const std::vector< std::pair< int32_t, int32_t > >	CA_OR_P_ON_L2 ({{71, 2}})
const std::vector< std::pair< int32_t, int32_t > >	SV_ACCURACY ({{73, 4}})
const std::vector< std::pair< int32_t, int32_t > >	SV_HEALTH ({{77, 6}})
const std::vector< std::pair< int32_t, int32_t > >	L2_P_DATA_FLAG ({{91, 1}})
const std::vector< std::pair< int32_t, int32_t > >	T_GD ({{197, 8}})
const std::vector< std::pair< int32_t, int32_t > >	IODC ({{83, 2}, {211, 8}})
const std::vector< std::pair< int32_t, int32_t > >	T_OC ({{219, 16}})
const std::vector< std::pair< int32_t, int32_t > >	A_F2 ({{241, 8}})
const std::vector< std::pair< int32_t, int32_t > >	A_F1 ({{249, 16}})
const std::vector< std::pair< int32_t, int32_t > >	A_F0 ({{271, 22}})
const std::vector< std::pair< int32_t, int32_t > >	IODE_SF2 ({{61, 8}})
const std::vector< std::pair< int32_t, int32_t > >	C_RS ({{69, 16}})
const std::vector< std::pair< int32_t, int32_t > >	DELTA_N ({{91, 16}})
const std::vector< std::pair< int32_t, int32_t > >	M_0 ({{107, 8}, {121, 24}})
const std::vector< std::pair< int32_t, int32_t > >	C_UC ({{151, 16}})
const std::vector< std::pair< int32_t, int32_t > >	ECCENTRICITY ({{167, 8}, {181, 24}})
const std::vector< std::pair< int32_t, int32_t > >	C_US ({{211, 16}})
const std::vector< std::pair< int32_t, int32_t > >	SQRT_A ({{227, 8}, {241, 24}})
const std::vector< std::pair< int32_t, int32_t > >	T_OE ({{271, 16}})
const std::vector< std::pair< int32_t, int32_t > >	FIT_INTERVAL_FLAG ({{271, 1}})
const std::vector< std::pair< int32_t, int32_t > >	AODO ({{272, 5}})
const std::vector< std::pair< int32_t, int32_t > >	C_IC ({{61, 16}})
const std::vector< std::pair< int32_t, int32_t > >	OMEGA_0 ({{77, 8}, {91, 24}})
const std::vector< std::pair< int32_t, int32_t > >	C_IS ({{121, 16}})
const std::vector< std::pair< int32_t, int32_t > >	I_0 ({{137, 8}, {151, 24}})
const std::vector< std::pair< int32_t, int32_t > >	C_RC ({{181, 16}})
const std::vector< std::pair< int32_t, int32_t > >	OMEGA ({{197, 8}, {211, 24}})
const std::vector< std::pair< int32_t, int32_t > >	OMEGA_DOT ({{241, 24}})
const std::vector< std::pair< int32_t, int32_t > >	IODE_SF3 ({{271, 8}})
const std::vector< std::pair< int32_t, int32_t > >	I_DOT ({{279, 14}})
const std::vector< std::pair< int32_t, int32_t > >	SV_DATA_ID ({{61, 2}})
const std::vector< std::pair< int32_t, int32_t > >	SV_PAGE ({{63, 6}})
const std::vector< std::pair< int32_t, int32_t > >	ALPHA_0 ({{69, 8}})
const std::vector< std::pair< int32_t, int32_t > >	ALPHA_1 ({{77, 8}})
const std::vector< std::pair< int32_t, int32_t > >	ALPHA_2 ({{91, 8}})
const std::vector< std::pair< int32_t, int32_t > >	ALPHA_3 ({{99, 8}})
const std::vector< std::pair< int32_t, int32_t > >	BETA_0 ({{107, 8}})
const std::vector< std::pair< int32_t, int32_t > >	BETA_1 ({{121, 8}})
const std::vector< std::pair< int32_t, int32_t > >	BETA_2 ({{129, 8}})
const std::vector< std::pair< int32_t, int32_t > >	BETA_3 ({{137, 8}})
const std::vector< std::pair< int32_t, int32_t > >	A_1 ({{151, 24}})
const std::vector< std::pair< int32_t, int32_t > >	A_0 ({{181, 24}, {211, 8}})
const std::vector< std::pair< int32_t, int32_t > >	T_OT ({{219, 8}})
const std::vector< std::pair< int32_t, int32_t > >	WN_T ({{227, 8}})
const std::vector< std::pair< int32_t, int32_t > >	DELTAT_LS ({{241, 8}})
const std::vector< std::pair< int32_t, int32_t > >	WN_LSF ({{249, 8}})
const std::vector< std::pair< int32_t, int32_t > >	DN ({{257, 8}})
const std::vector< std::pair< int32_t, int32_t > >	DELTAT_LSF ({{271, 8}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV25 ({{229, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV26 ({{241, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV27 ({{247, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV28 ({{253, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV29 ({{259, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV30 ({{271, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV31 ({{277, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV32 ({{283, 6}})
const std::vector< std::pair< int32_t, int32_t > >	T_OA ({{69, 8}})
const std::vector< std::pair< int32_t, int32_t > >	WN_A ({{77, 8}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV1 ({{91, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV2 ({{97, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV3 ({{103, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV4 ({{109, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV5 ({{121, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV6 ({{127, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV7 ({{133, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV8 ({{139, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV9 ({{151, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV10 ({{157, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV11 ({{163, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV12 ({{169, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV13 ({{181, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV14 ({{187, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV15 ({{193, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV16 ({{199, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV17 ({{211, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV18 ({{217, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV19 ({{223, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV20 ({{229, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV21 ({{241, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV22 ({{247, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV23 ({{253, 6}})
const std::vector< std::pair< int32_t, int32_t > >	HEALTH_SV24 ({{259, 6}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_ECC ({{69, 16}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_TOA ({{91, 8}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_DELTAI ({{99, 16}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_OMEGADOT ({{121, 16}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_SVHEALTH ({{137, 8}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_SQUAREA ({{151, 24}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_OMEGAZERO ({{181, 24}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_OMEGA ({{211, 24}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_MZERO ({{241, 24}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_AF0 ({{271, 8}, {290, 3}})
const std::vector< std::pair< int32_t, int32_t > >	ALM_AF1 ({{279, 11}})

Variables
constexpr double	GPS_L1_FREQ_HZ = FREQ1
	L1 [Hz].
constexpr double	GPS_L1_CA_CODE_RATE_CPS = 1.023e6
	GPS L1 C/A code rate [chips/s].
constexpr double	GPS_L1_CA_CODE_LENGTH_CHIPS = 1023.0
	GPS L1 C/A code length [chips].
constexpr double	GPS_L1_CA_CODE_PERIOD_S = 0.001
	GPS L1 C/A code period [seconds].
constexpr double	GPS_L1_CA_CHIP_PERIOD_S = 9.7752e-07
	GPS L1 C/A chip period [seconds].
constexpr uint32_t	GPS_L1_CA_CODE_PERIOD_MS = 1U
	GPS L1 C/A code period [ms].
constexpr uint32_t	GPS_L1_CA_BIT_PERIOD_MS = 20U
	GPS L1 C/A bit period [ms].
constexpr double	MAX_TOA_DELAY_MS = 20.0
	Maximum Time-Of-Arrival (TOA) difference between satellites for a receiver operated on Earth surface is 20 ms.
constexpr uint32_t	GPS_L1_CA_OPT_ACQ_FS_SPS = 2000000
	Sampling frequency that maximizes the acquisition SNR while using a non-multiple of chip rate.
constexpr int32_t	GPS_L1_CA_HISTORY_DEEP = 100
constexpr double	GPS_CA_PREAMBLE_DURATION_S = 0.160
constexpr int32_t	GPS_CA_PREAMBLE_LENGTH_BITS = 8
constexpr int32_t	GPS_CA_PREAMBLE_LENGTH_SYMBOLS = 160
constexpr int32_t	GPS_CA_PREAMBLE_DURATION_MS = 160
constexpr int32_t	GPS_CA_TELEMETRY_RATE_BITS_SECOND = 50
	NAV message bit rate [bits/s].
constexpr int32_t	GPS_CA_TELEMETRY_SYMBOLS_PER_BIT = 20
constexpr int32_t	GPS_CA_TELEMETRY_RATE_SYMBOLS_SECOND = GPS_CA_TELEMETRY_RATE_BITS_SECOND * GPS_CA_TELEMETRY_SYMBOLS_PER_BIT
	NAV message bit rate [symbols/s].
constexpr int32_t	GPS_WORD_LENGTH = 4
	CRC + GPS WORD (-2 -1 0 ... 29) Bits = 4 bytes.
constexpr int32_t	GPS_SUBFRAME_LENGTH = 40
	GPS_WORD_LENGTH x 10 = 40 bytes.
constexpr int32_t	GPS_SUBFRAME_BITS = 300
	Number of bits per subframe in the NAV message [bits].
constexpr int32_t	GPS_SUBFRAME_SECONDS = 6
	Subframe duration [seconds].
constexpr int32_t	GPS_SUBFRAME_MS = 6000
	Subframe duration [seconds].
constexpr int32_t	GPS_WORD_BITS = 30
	Number of bits per word in the NAV message [bits].
constexpr char	GPS_CA_PREAMBLE [9] = "10001011"
constexpr char	GPS_CA_PREAMBLE_SYMBOLS_STR [161] = "1111111111111111111100000000000000000000000000000000000000000000000000000000000011111111111111111111000000000000000000001111111111111111111111111111111111111111"
constexpr double	T_GD_LSB = TWO_N31
constexpr int32_t	T_OC_LSB = static_cast<int32_t>(TWO_P4)
constexpr double	A_F2_LSB = TWO_N55
constexpr double	A_F1_LSB = TWO_N43
constexpr double	A_F0_LSB = TWO_N31
constexpr double	C_RS_LSB = TWO_N5
constexpr double	DELTA_N_LSB = PI_TWO_N43
constexpr double	M_0_LSB = PI_TWO_N31
constexpr double	C_UC_LSB = TWO_N29
constexpr double	ECCENTRICITY_LSB = TWO_N33
constexpr double	C_US_LSB = TWO_N29
constexpr double	SQRT_A_LSB = TWO_N19
constexpr int32_t	T_OE_LSB = static_cast<int32_t>(TWO_P4)
constexpr int32_t	AODO_LSB = 900
constexpr double	C_IC_LSB = TWO_N29
constexpr double	OMEGA_0_LSB = PI_TWO_N31
constexpr double	C_IS_LSB = TWO_N29
constexpr double	I_0_LSB = PI_TWO_N31
constexpr double	C_RC_LSB = TWO_N5
constexpr double	OMEGA_LSB = PI_TWO_N31
constexpr double	OMEGA_DOT_LSB = PI_TWO_N43
constexpr double	I_DOT_LSB = PI_TWO_N43
constexpr double	ALPHA_0_LSB = TWO_N30
constexpr double	ALPHA_1_LSB = TWO_N27
constexpr double	ALPHA_2_LSB = TWO_N24
constexpr double	ALPHA_3_LSB = TWO_N24
constexpr double	BETA_0_LSB = TWO_P11
constexpr double	BETA_1_LSB = TWO_P14
constexpr double	BETA_2_LSB = TWO_P16
constexpr double	BETA_3_LSB = TWO_P16
constexpr double	A_1_LSB = TWO_N50
constexpr double	A_0_LSB = TWO_N30
constexpr double	T_OT_LSB = TWO_P12
constexpr double	WN_T_LSB = 1
constexpr double	DELTAT_LS_LSB = 1
constexpr double	WN_LSF_LSB = 1
constexpr double	DN_LSB = 1
constexpr double	DELTAT_LSF_LSB = 1
constexpr int32_t	T_OA_LSB = TWO_P12
constexpr double	ALM_ECC_LSB = TWO_N21
constexpr int32_t	ALM_TOA_LSB = static_cast<int32_t>(TWO_P12)
constexpr double	ALM_DELTAI_LSB = TWO_N19
constexpr double	ALM_OMEGADOT_LSB = TWO_N38
constexpr double	ALM_SQUAREA_LSB = TWO_N11
constexpr double	ALM_OMEGAZERO_LSB = TWO_N23
constexpr double	ALM_OMEGA_LSB = TWO_N23
constexpr double	ALM_MZERO_LSB = TWO_N23
constexpr double	ALM_AF0_LSB = TWO_N20
constexpr double	ALM_AF1_LSB = TWO_N38

Detailed Description

Defines system parameters for GPS L1 C/A signal and NAV data.

Author

Javier Arribas, 2011. jarribas(at)cttc.es

---

GNSS-SDR is a Global Navigation Satellite System software-defined receiver. This file is part of GNSS-SDR.

Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors) SPDX-License-Identifier: GPL-3.0-or-later

---

Definition in file GPS_L1_CA.h.