siderealTime: Convert a POSIXt time to a sidereal time
In oce: Analysis of Oceanographic Data
siderealTime R Documentation
Convert a POSIXt time to a sidereal time
Description
Convert a POSIXt time to a sidereal time, using
the method in Chapter 7 of reference 1. The small correction
that he discusses after his equation 7.1 is not applied here.
Usage
siderealTime(t)
Arguments
t
a time, in POSIXt format, e.g. as created by
as.POSIXct(), as.POSIXlt(), or
numberAsPOSIXct(). If this is provided, the other arguments are
ignored.
Value
A sidereal time, in hours in the range from 0 to 24.
Author(s)
Dan Kelley
References
Meeus, Jean. Astronomical Formulas for Calculators. Second Edition.
Richmond, Virginia, USA: Willmann-Bell, 1982.
See Also
Other things related to astronomy:
angle2hms(),
eclipticalToEquatorial(),
equatorialToLocalHorizontal(),
julianCenturyAnomaly(),
julianDay(),
moonAngle(),
sunAngle(),
sunDeclinationRightAscension()
Examples
t <- ISOdatetime(1978, 11, 13, 0, 0, 0, tz="UTC")
print(siderealTime(t))
oce documentation built on July 9, 2023, 5:18 p.m.
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| siderealTime | R Documentation |
Convert a POSIXt time to a sidereal time
Description
Convert a POSIXt time to a sidereal time, using the method in Chapter 7 of reference 1. The small correction that he discusses after his equation 7.1 is not applied here.
Usage
siderealTime(t)
Arguments
t |
a time, in POSIXt format, e.g. as created by
|
Value
A sidereal time, in hours in the range from 0 to 24.
Author(s)
Dan Kelley
References
Meeus, Jean. Astronomical Formulas for Calculators. Second Edition. Richmond, Virginia, USA: Willmann-Bell, 1982.
See Also
Other things related to astronomy:
angle2hms(),
eclipticalToEquatorial(),
equatorialToLocalHorizontal(),
julianCenturyAnomaly(),
julianDay(),
moonAngle(),
sunAngle(),
sunDeclinationRightAscension()
Examples
t <- ISOdatetime(1978, 11, 13, 0, 0, 0, tz="UTC")
print(siderealTime(t))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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