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Further notes on PPL LIST TAXIS
Here is an example of the output of PPL LIST TAXIS.
The data in question has a time range (from "SHO GRID") of:
TIME TIME 1781 r 03-JAN-1979 00:00 23-MAY-2003 00:00
Note that PPL LIST TAXIS only functions AFTER a plot has been made!
For the above data, plotted without specifying anything about the
time range, this command shows:
yes? PPL LIST TAXIS
TAXIS QUALITIES
LO= 8.77E+03 DT= 6.00E+01 CSIZE= 1.00E-01 TYPE= TAXIS3 VANG= 0.00E+00
TOP AXIS= ON BOTTOM AXIS= ON
TMIN=19790101000000 0:00 JAN 1,1979
TMAX=20030601000000 0:00 JUN 1,2003
TSTART=19771231115734 11:57 DEC 31,1977
NMTC= -1 LABEL= -3 IFDB= 0 ISDB= 2 TAXIS= XAXIS IAUTOT= ON
TMIN and TMAX are the actual plot ranges. How TSTART was chosen I
have no idea, but as is typical, it is about 1 year before the
actual left edge of the plot. In the first line of output, the
useful values are:
LO= 8.77E+03, which is the user-unit value (hours) of the left edge.
Note that LO is a rounding of `365.24*24` = 8765.8.
DT= 6.00E+01, which tells you that one time axis unit is 60 minutes.
(I was wrong in the previous example. Ferret actually works in minutes,
I think, but somehow the unit actually used in many plots extending
over months or years is hours). DT tells you that.
The rest of the information is incomprehensible to me.
Billy K
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