mirror of https://github.com/gnss-sdr/gnss-sdr
123 lines
6.1 KiB
C++
123 lines
6.1 KiB
C++
/*!
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* \file MATH_CONSTANTS.h
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* \brief Defines useful mathematical constants and their scaled versions
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* \author Javier Arribas, 2013. jarribas(at)cttc.es
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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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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_MATH_CONSTANTS_H_
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#define GNSS_SDR_MATH_CONSTANTS_H_
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#include <string>
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/* Constants for scaling the ephemeris found in the data message
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the format is the following: TWO_N5 -> 2^-5, TWO_P4 -> 2^4, PI_TWO_N43 -> Pi*2^-43, etc etc
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Additionally some of the PI*2^N terms are used in the tracking stuff
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TWO_PX ==> 2^X
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TWO_NX ==> 2^-X
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PI_TWO_NX ==> Pi*2^-X
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PI_TWO_PX ==> Pi*2^X
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ONE_PI_TWO_PX = (1/Pi)*2^X
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*/
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const double HALF_PI = 1.570796326794897; //!< pi/2
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const double PI = 3.1415926535897932; //!< pi
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const double PI_2 = 2.0 * PI; //!< 2 * pi
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const double TWO_P3 = (8); //!< 2^3
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const double TWO_P4 = (16); //!< 2^4
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const double TWO_P11 = (2048); //!< 2^11
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const double TWO_P12 = (4096); //!< 2^12
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const double TWO_P14 = (16384); //!< 2^14
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const double TWO_P16 = (65536); //!< 2^16
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const double TWO_P19 = (524288); //!< 2^19
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const double TWO_P31 = (2147483648.0); //!< 2^31
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const double TWO_P32 = (4294967296.0); //!< 2^32 this is too big for an int so add the x.0
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const double TWO_P56 = (7.205759403792794e+016); //!< 2^56
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const double TWO_P57 = (1.441151880758559e+017); //!< 2^57
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const double TWO_N2 = (0.25); //!< 2^-2
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const double TWO_N5 = (0.03125); //!< 2^-5
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const double TWO_N6 = (0.015625); //!< 2^-6
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const double TWO_N8 = (0.00390625); //!< 2^-8
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const double TWO_N9 = (0.001953125); //!< 2^-9
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const double TWO_N10 = (0.0009765625); //!< 2^-10
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const double TWO_N11 = (4.882812500000000e-004); //!< 2^-11
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const double TWO_N14 = (0.00006103515625); //!< 2^-14
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const double TWO_N15 = (0.00003051757813); //!< 2^-15
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const double TWO_N16 = (0.0000152587890625); //!< 2^-16
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const double TWO_N17 = (7.629394531250000e-006); //!< 2^-17
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const double TWO_N18 = (3.814697265625000e-006); //!< 2^-18
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const double TWO_N19 = (1.907348632812500e-006); //!< 2^-19
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const double TWO_N20 = (9.536743164062500e-007); //!< 2^-20
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const double TWO_N21 = (4.768371582031250e-007); //!< 2^-21
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const double TWO_N23 = (1.192092895507810e-007); //!< 2^-23
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const double TWO_N24 = (5.960464477539063e-008); //!< 2^-24
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const double TWO_N25 = (2.980232238769531e-008); //!< 2^-25
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const double TWO_N27 = (7.450580596923828e-009); //!< 2^-27
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const double TWO_N29 = (1.862645149230957e-009); //!< 2^-29
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const double TWO_N30 = (9.313225746154785e-010); //!< 2^-30
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const double TWO_N31 = (4.656612873077393e-010); //!< 2^-31
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const double TWO_N32 = (2.328306436538696e-010); //!< 2^-32
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const double TWO_N33 = (1.164153218269348e-010); //!< 2^-33
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const double TWO_N34 = (5.82076609134674e-011); //!< 2^-34
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const double TWO_N35 = (2.91038304567337e-011); //!< 2^-35
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const double TWO_N38 = (3.637978807091713e-012); //!< 2^-38
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const double TWO_N39 = (1.818989403545856e-012); //!< 2^-39
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const double TWO_N40 = (9.094947017729280e-013); //!< 2^-40
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const double TWO_N43 = (1.136868377216160e-013); //!< 2^-43
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const double TWO_N44 = (5.684341886080802e-14); //!< 2^-44
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const double TWO_N46 = (1.4210854715202e-014); //!< 2^-46
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const double TWO_N48 = (3.552713678800501e-15); //!< 2^-46
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const double TWO_N50 = (8.881784197001252e-016); //!< 2^-50
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const double TWO_N51 = (4.44089209850063e-016); //!< 2^-51
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const double TWO_N55 = (2.775557561562891e-017); //!< 2^-55
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const double TWO_N57 = (6.938893903907228e-18); //!< 2^-57
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const double TWO_N59 = (1.73472347597681e-018); //!< 2^-59
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const double TWO_N60 = (8.673617379884036e-19); //!< 2^-60
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const double TWO_N66 = (1.3552527156068805425093160010874271392822265625e-20); //!< 2^-66
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const double TWO_N68 = (3.388131789017201e-21); //!< 2^-68
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const double PI_TWO_N19 = (5.992112452678286e-006); //!< Pi*2^-19
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const double PI_TWO_N43 = (3.571577341960839e-013); //!< Pi*2^-43
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const double PI_TWO_N31 = (1.462918079267160e-009); //!< Pi*2^-31
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const double PI_TWO_N38 = (1.142904749427469e-011); //!< Pi*2^-38
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const double PI_TWO_N23 = (3.745070282923929e-007); //!< Pi*2^-23
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const double D2R = (PI / 180.0); //!< deg to rad
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const double R2D = (180.0 / PI); //!< rad to deg
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const double SC2RAD = 3.1415926535898; //!< semi-circle to radian (IS-GPS)
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const double AS2R = (D2R / 3600.0); //!< arc sec to radian
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const double DEFAULT_OMEGA_EARTH_DOT = 7.2921151467e-5; //!< Default Earth rotation rate, [rad/s]
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const double SPEED_OF_LIGHT = 299792458.0; //!< [m/s]
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const double SPEED_OF_LIGHT_MS = 299792.4580; //!< [m/ms]
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const double AU = 149597870691.0; //!< 1 Astronomical Unit AU (m) distance from Earth to the Sun.
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#endif // GNSS_SDR_MATH_CONSTANTS_H_
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