Decimal Julian Day
convert JD, HR, MIN SEC to Decimal Julian Day
Jtim(jj, hr = hr, mi = mi, sec = sec, yr=NULL, origyr=NULL) JtimL(j)
jj |
Julian day |
hr |
Hour |
mi |
Minute |
sec |
Second |
yr |
year, default = NULL |
origyr |
default = NULL |
or
j |
list of the above |
Using a NULL value for yr gives the fractional julian day in a year. If yr is a legitimate year, and the origyr is provided, then the EPOCH number of days from origyr are added onto the fractional julian day. The default for origyr is 1972 for most of seismology.
If the dates span a new year, sometimes it is useful to use the earliest year as the origyr.
Julian day
Jonathan M. Lees<jonathan.lees@unc.edu>
secdif
Jtim( 9 , hr= 14 , mi= 53 ,sec= 16.7807606880087 ) Jtim( 9 , hr= 14 , mi= 53 ,sec= 16.7807606880087, yr=2019, origyr=1972 ) ######## or, j = list(jd=9 , hr= 14 , mi= 53 ,sec= 16.7807606880087) JtimL(j)
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.