27、星历处理任务定义

本文主要是介绍27、星历处理任务定义，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

$\qquad$ 下面是HD-GR GNSS导航软件的星历处理任务相关定义：

// main_ephemeris.h -- Header file for the main_ephemeris.c file/* * Copyright (C) 2005 Andrew Greenberg* Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2 (June 1991).* See the "COPYING" file distributed with this software for more information.*//* Namuru GPS receiver project* Original : ephemeris.h* Modes    : None* version  : V1.0* date     : 21st/Dec/2006*//* * HD-GR GNSS receiver project* Modes    : Inherited the definitions of ephemeris.h and ephemeris.c in the *            Namuru GPS receiver project V1.0 and made necessary adjustments *            to adapt to the new RTOS and functions.* version  : V1.0* date     : xx/xx/2015*/#ifndef __MAIN_EPHEMERIS_H__
#define __MAIN_EPHEMERIS_H__#include "constants.h"
#include "main_position.h"/******************************************************************************** Definitions******************************************************************************/
// c_2pX == 2^+X, c_2mX == 2^-X, c_10mX == 10^-X,
#define c_10m10   1.0e-10
#define c_2p16	  65536.0
#define c_2p14	  16384.0
#define c_2p12	  4096.0
#define c_2p11	  2048.0
#define c_2p4     16.0
#define c_2p3     8.0
#define c_2m5     0.03125
#define c_2m6     0.015625
#define c_2m11    4.8828125e-4			// NaN
#define c_2m19    1.9073486328125e-6
#define c_2m20    9.5367431640625e-7	// NaN
#define c_2m21    4.76837158203125e-7	// NaN
#define c_2m23    1.19209289550781e-7   // NaN
#define c_2m24    5.96046447753906e-8   // NaN
#define c_2m27    7.45058059692383e-9	// NaN
#define c_2m29    1.86264514923096e-9
#define c_2m30    9.31322574615479e-10  // NaN
#define c_2m31    4.65661287307739e-10
#define c_2m33    1.16415321826935E-10
#define c_2m38    3.63797880709171e-12  // NaN
#define c_2m43    1.13686837721616e-13
#define c_2m50    8.881784197e-16       // NaN
#define c_2m55    2.77555756156289e-17
#define c_2m66    1.35525271560688e-20#define bit_test_l(data, bit_n) (data & (0x1L << (bit_n-1)))
#define SQ(x) ((x)*(x))
#define CUBE(x) ((x) * (x) * (x))/******************************************************************************** Declarations******************************************************************************/// broadcast ionospheric delay model
typedef struct {double alf0, alf1, alf2, alf3;double bta0, bta1, bta2, bta3;
} bc_ion_t;// Approximate orbital parameters
typedef struct {short int health;	// health=0int week;			// weekfloat ety;			// Eccentricityfloat toa;			// Time of Applicability (s)float inc;			// Orbital Inclination(rad)float rra;			// Rate of Right Ascen(R/s)float sqa;			// SQRT(A) (m^1/2)float lan;			// Right Ascen at TOA(rad)float aop;			// Argument of Perigee(rad)float ma;			// Mean Anom(rad)float af0;			// Af0(s)float af1;			// Af1(s/s)float w;short int update;	// update=1// char text_message[23];
} almanac_t;void ephemeris_task(void* pdata);
void initialize_ephetable( void);
int satfind (unsigned short bgps,int prn,stdtime_t gmt,pvt_t rec_pos,neu_t rec_neu,azel_t *pazel,double *pvel);/******************************************************************************** Externs******************************************************************************/extern OS_FLAG_GRP* m_EphemerisChannelFlag;
extern OS_FLAG_GRP* m_EphemerisSubframeFlags[TOT_MAX_CHANNELS];
#ifdef GNSS_ENABLE_MUTEX
extern OS_EVENT *m_EphTabMutex;
#endif#endif // __MAIN_EPHEMERIS_H__