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VLA Planetary Motion Page
This page will only be displayed if the
"Planet/Solar motion?"
item on the Initial condition page page is set to "YES".
Reference IAT
Reference Time (IAT) for the motion of the planet, comet, or Sun.
This field defines the exact time at which the position entered on the
Source Page is valid.
The motions entered on this Page are referred to the Reference Time.
The time is entered as "hh mm ss".
If left blank, it is written to the OBSERVE file as such.
The VLA on-line system will interpret a blank as "00 00 00"; if the
other parameters in this page are entered, then this is probably erroneous.
Equatorial Horizontal Parallax
The Equatorial Horizontal Parallax for the planet, comet, or Sun in arcseconds.
dRa/dt
The motion of the planet, comet, or Sun in Right Ascension measured
in seconds of RA per day.
If left blank, it is written to the OBSERVE file as such.
The VLA on-line system will interpret a blank as "0" (zero).
dDec/dt
The motion of the planet, comet, or Sun in Declination measured in
seconds of Dec per day.
If left blank, it is written to the OBSERVE file as such.
The VLA on-line system will interpret a blank as "0" (zero).