Represents the aberration correction options in ANISE.
An Almanac contains all of the loaded SPICE and ANISE data.
A thread-safe reference-counting pointer. ‘Arc’ stands for ‘Atomically
Reference Counted’.
Defines generally usable durations for nanosecond precision valid for 32,768 centuries in either direction, and only on 80 bits / 10 octets.
Defines a nanosecond-precision Epoch.
An object providing access to an open file on the filesystem.
A Frame uniquely defined by its ephemeris center and orientation. Refer to FrameDetail for frames combined with parameters.
A unique frame reference that only contains enough information to build the actual Frame object.
It cannot be used for any computations, is it be used in any structure apart from error structures.
A structure to set up an Almanac, with automatic downloading, local storage, checksum checking, and more.
An iterator of a sequence of evenly spaced Epochs.
BDT(BeiDou): 2005 Dec 31st Midnight
BDT (BeiDou) reference epoch is 2005 December 31st UTC at midnight. This time scale is synchronized with UTC.
|UTC - TAI| = XX Leap Seconds on that day.
DAYS_PER_CENTURY
corresponds to the number of days per century in the Julian calendar.
DAYS_PER_YEAR
corresponds to the number of days per year in the Julian calendar.
DAYS_PER_YEAR_NLD
corresponds to the number of days per year without leap days.
The Ephemeris Time epoch, in seconds
GST (Galileo) reference epoch is 13 seconds before 1999 August 21 UTC at midnight.
|UTC - TAI| = XX Leap Seconds on that day.
The J1900 reference epoch (1900-01-01 at noon) TAI.
The J2000 reference epoch (2000-01-01 at midnight) TAI.
|UTC - TAI| = XX Leap Seconds on that day.
Julian date for the J1900 epoch, as per NAIF SPICE.
Julian date for the J2000 epoch, as per NAIF SPICE.
Julian days between 01 Jan 1900 at midnight and the Modified Julian Day at 17 November 1858.
Julian days between 01 Jan 2000 at noon and the Modified Julian Day at 17 November 1858.
Modified Julian Date in seconds as defined
here. MJD epoch is Modified Julian Day at 17 November 1858 at midnight.
NAIF leap second kernel data for EB used to calculate the eccentric anomaly of the heliocentric orbit of the Earth-Moon barycenter.
NAIF leap second kernel data used to calculate the difference between ET and TAI.
NAIF leap second kernel data for M_0 used to calculate the mean anomaly of the heliocentric orbit of the Earth-Moon barycenter.
NAIF leap second kernel data for M_1 used to calculate the mean anomaly of the heliocentric orbit of the Earth-Moon barycenter.
QZSS and GPS share the same reference epoch.
SECONDS_PER_CENTURY
defines the number of seconds per century.
SECONDS_PER_DAY
defines the number of seconds per day.
SECONDS_PER_HOUR
defines the number of seconds per hour.
SECONDS_PER_MINUTE
defines the number of seconds per minute.
SECONDS_PER_SIDEREAL_YEAR
corresponds to the number of seconds per sidereal year from
NIST.
SECONDS_PER_TROPICAL_YEAR
corresponds to the number of seconds per tropical year from
NAIF SPICE.
SECONDS_PER_YEAR
corresponds to the number of seconds per julian year from
NAIF SPICE.
The UNIX reference epoch of 1970-01-01 in TAI duration, accounting only for IERS leap seconds.