id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
134	Additional Questions for Time Functions (Section 5.1)	calvin.harman@…	Paul Price	"The value of UT1-UTC is required to calculate sidereal time. Getting this 
difference requires the use of a table that is updated every few months. Within 
this table, a formula is given to approximate the value of UT1-UTC. Can this 
formula be used instead to avoid having to download a new table every few 
months?

SLALIB provides a function for calculating to sidereal time (sla_GMST), but I 
haven't found a function to calculate from sidereal time, which is required by 
the psLSTToTime function in the SDRS. Is a such a function available?

Longitude is given as the  second argument to the function psTimeToLST, but the 
function sla_GMST does not take a longitude argument. The assumption is that 
longitude is to be added to the result of the sla_GMST function. If so, is east 
positive and west negative?

Is there an algorithm for the new function, psGetPoleCoords function? I don't 
have a definition.

The functions psTimeToTM and psTMToTime were removed from the latest version of 
the SDRS. Can they be added back in? Another function in psLib is currently 
using these.

What's the difference between the functions psTAISub and psTAIDelta? They 
appear to do the same thing."	defect	closed	high		IPP SDRS	unspecified	normal	fixed