The class is responsible for all time-related tasks. More...

Classes
struct	std::hash< NAV::InsTime >
	Hash function for InsTime (needed for unordered_map) More...

class	NAV::InsTime
	The class is responsible for all time-related tasks. More...

struct	NAV::InsTime_GPSweekTow
	GPS week and time of week in GPS standard time [GPST]. More...

struct	NAV::InsTime_JD
	Julien Date [UTC]. More...

struct	NAV::InsTime_MJD
	Modified Julien Date [UTC]. More...

struct	NAV::InsTime_YDoySod
	GPS year and day of year in GPS standard time [GPST]. More...

struct	NAV::InsTime_YMDHMS
	Universal Time Coordinated [UTC]. More...

Namespaces
namespace	NAV::InsTimeUtil
	Utility Namespace for Time related tasks.

Typedefs
using	json
	json namespace

Functions
constexpr int32_t	NAV::InsTimeUtil::daysInMonth (int32_t month, int32_t year)
	Returns the number of days in the specified month of the year.

void	NAV::from_json (const json &j, InsTime &insTime)
	Converts the provided json object into an InsTime.

constexpr bool	NAV::InsTimeUtil::isLeapYear (int32_t year)
	Returns true if the provided year is a leap year, false otherwise.

std::ostream &	NAV::operator<< (std::ostream &os, const InsTime &insTime)
	Stream insertion operator overload.

std::ostream &	NAV::operator<< (std::ostream &os, const InsTime_GPSweekTow &gpsWeekTow)
	Stream insertion operator overload.

std::ostream &	NAV::operator<< (std::ostream &os, const InsTime_JD &jd)
	Stream insertion operator overload.

std::ostream &	NAV::operator<< (std::ostream &os, const InsTime_MJD &mjd)
	Stream insertion operator overload.

std::ostream &	NAV::operator<< (std::ostream &os, const InsTime_YDoySod &yDoySod)
	Stream insertion operator overload.

std::ostream &	NAV::operator<< (std::ostream &os, const InsTime_YMDHMS &ymdhms)
	Stream insertion operator overload.

void	NAV::to_json (json &j, const InsTime &insTime)
	Converts the provided InsTime into a json object.

Variables
constexpr int32_t	NAV::InsTimeUtil::DAYS_PER_WEEK
	Days / Week.

constexpr int32_t	NAV::InsTimeUtil::DAYS_PER_YEAR
	Days / Year.

constexpr int32_t	NAV::InsTimeUtil::DIFF_BDT_WEEK_TO_GPST_WEEK
	BeiDou starts zero at 1-Jan-2006 and GPS starts 6-Jan-1980.

constexpr int32_t	NAV::InsTimeUtil::DIFF_MJD_TO_JD_DAYS
	Difference of the days between MJD and JD.

constexpr long double	NAV::InsTimeUtil::DIFF_MJD_TO_JD_FRAC
	Difference of the fraction between MJD and JD.

constexpr int32_t	NAV::InsTimeUtil::DIFF_TO_1_1_1970_MJD
	01.01.1970 00:00:00 UTC in Modified Julian Date (UNIX epoch)

constexpr int32_t	NAV::InsTimeUtil::DIFF_TO_6_1_1980_MJD
	06.01.1980 in Modified Julian Date

constexpr int32_t	NAV::InsTimeUtil::END_OF_THE_CENTURY_MJD
	Modified Julian Date of the end of the century (15.01.2954)

constexpr long double	NAV::InsTimeUtil::EPSILON

constexpr std::array< int32_t, 20 >	NAV::InsTimeUtil::GPS_LEAP_SEC_MJD
	Maps GPS leap seconds to a time: array<mjd_day>, index + 1 is amount of leap seconds.

constexpr int32_t	NAV::InsTimeUtil::HOURS_PER_DAY
	Hours / Day.

constexpr int32_t	NAV::InsTimeUtil::HOURS_PER_WEEK
	Hours / Week.

constexpr int32_t	NAV::InsTimeUtil::MINUTES_PER_DAY
	Minutes / Day.

constexpr int32_t	NAV::InsTimeUtil::MINUTES_PER_HOUR
	Minutes / Hour.

constexpr int32_t	NAV::InsTimeUtil::MINUTES_PER_WEEK
	Minutes / Week.

constexpr int32_t	NAV::InsTimeUtil::MONTHS_PER_YEAR
	Months / Year.

constexpr int32_t	NAV::InsTimeUtil::SECONDS_PER_DAY
	Seconds / Day.

constexpr int32_t	NAV::InsTimeUtil::SECONDS_PER_HOUR
	Seconds / Hour.

constexpr int32_t	NAV::InsTimeUtil::SECONDS_PER_MINUTE
	Seconds / Minute.

constexpr int32_t	NAV::InsTimeUtil::SECONDS_PER_WEEK
	Seconds / Week.

constexpr int32_t	NAV::InsTimeUtil::WEEKS_PER_GPS_CYCLE
	Weeks per GPS cycle.

Detailed Description

The class is responsible for all time-related tasks.

Author: T. Topp (topp@.nosp@m.ins..nosp@m.uni-s.nosp@m.tutt.nosp@m.gart..nosp@m.de); T. Lambertus (tomke.nosp@m.-jan.nosp@m.tje.l.nosp@m.ambe.nosp@m.rtus@.nosp@m.nav..nosp@m.uni-s.nosp@m.tutt.nosp@m.gart..nosp@m.de)

Date: 2020-12-02

This class contains all time-transformations functions. One instance is created for each InsTime object (defined in the structs). Internally, only the MJD-time (Modified Julien Date) is stored (here MJD is a struct which has mjd_day and mjd_frac).

Function Documentation

◆ from_json()

void NAV::from_json	(	const json &	j,
		InsTime &	insTime )

Converts the provided json object into an InsTime.

Parameters

[in]	j	Json object with the time values
[out]	insTime	Time to return