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KSAlmanac Class Reference

#include <ksalmanac.h>

Public Member Functions

 KSAlmanac ()
 KSAlmanac (const KStarsDateTime &midnight, const GeoLocation *geo=nullptr)
double getDawnAstronomicalTwilight () const
double getDuskAstronomicalTwilight () const
double getMoonIllum () const
double getMoonPhase () const
double getMoonRise () const
double getMoonSet () const
double getSunMaxAlt () const
double getSunMinAlt () const
double getSunRise () const
double getSunSet () const
QTime moonRise () const
QTime moonSet () const
void setLocation (const GeoLocation *geo_)
QTime sunRise () const
QTime sunSet () const
double sunZenithAngleToTime (double z) const
void setDate (const KStarsDateTime &utc_midnight)
void setDateFromLT (const KStarsDateTime &local_midnight)
KStarsDateTime getDate () const

Detailed Description

Implement methods to find important times in a day.

A class that implements methods to find sun rise, sun set, twilight begin / end times, moon rise and moon set times.

Prakash Mohan

Definition at line 26 of file ksalmanac.h.

Constructor & Destructor Documentation

◆ KSAlmanac() [1/2]

KSAlmanac::KSAlmanac ( )

KSAlmanac constructor initializing an almanac for the current KStarsData::Instance geolocation and time.

Definition at line 13 of file ksalmanac.cpp.

◆ KSAlmanac() [2/2]

KSAlmanac::KSAlmanac ( const KStarsDateTime midnight,
const GeoLocation geo = nullptr 

KSAlmanac constructor initializing an almanac for an arbitrary geolocation and time.

midnightis the midnight date and time to consider as beginning of the day at the "geo" location.
geois the GeoLocation to use for this almanac, defaulting to the KStarsData::Instance geolocation.
if the timespec of midnight is local time, its UTC value at the geolocation "geo" will be used instead.

Definition at line 29 of file ksalmanac.cpp.

Member Function Documentation

◆ getMoonIllum()

double KSAlmanac::getMoonIllum ( ) const
get the moon illuminated fraction at the given date/time. Range is [0.,1.]

Definition at line 86 of file ksalmanac.h.

◆ getMoonPhase()

double KSAlmanac::getMoonPhase ( ) const
the moon phase in degrees at the given date/time. Ranges is [0, 180]

Definition at line 81 of file ksalmanac.h.

◆ getSunMaxAlt()

double KSAlmanac::getSunMaxAlt ( ) const

These functions return the max and min altitude of the sun during the course of the day in degrees.

Definition at line 75 of file ksalmanac.h.

◆ getSunRise()

double KSAlmanac::getSunRise ( ) const

All the functions returns the fraction of the day given by getDate() as their return value.

Definition at line 65 of file ksalmanac.h.

◆ setDate()

void KSAlmanac::setDate ( const KStarsDateTime utc_midnight)

Get/set the date for computations to the given date.

utc_midnightand local_midnight are the midnight date and time to consider as beginning of the day at the geo_ location, either UTC or local.
The time must be the local time midnight of the day the almanac is required for, so that resulting ephemerides are calculated around that time.
These functions are not merged into a single timespec-aware one for backwards compatilibity.

Definition at line 172 of file ksalmanac.cpp.

◆ setLocation()

void KSAlmanac::setLocation ( const GeoLocation geo_)

Set the location for computations to the given location.

geo_The location to set for computations

Definition at line 178 of file ksalmanac.cpp.

◆ sunZenithAngleToTime()

double KSAlmanac::sunZenithAngleToTime ( double  z) const

Convert the zenithal distance of the sun to fraction of the day.

zZenithal angular distance
Time as a fraction of the day, at which the zenithal distance is attained by the sun
This is accurate only for zenithal angles close to sunset. TODO: Make this more accurate

Definition at line 184 of file ksalmanac.cpp.

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