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`OPHLIMTI`

`OPHLIMTI ` is the parameter for `OPTMODE=HAS` that sets the
normalization for the time offset from the limits of when a source
is up. The equations for the weights for rise and set are:

RISEWT=MAX(0.0,OPHLIMWT(JSCN)*(1.0-ABS(HA1(JSCN,RSTA)-HAMIN(JSCN))*
3600.0/OPHLIMTI(JSCN)))
SETWT=MAX(0.0,OPHLIMWT(JSCN)*(1.0-ABS(HA1(JSCN,RSTA)-HAMAX(JSCN))*
3600.0/OPHLIMTI(JSCN)))

where `HA1` is the hour angle of the proposed scan, `HAMIN`
and `HAMAX` are the hour angles at which the source rises or
sets. This only worries about the rise and set times. Some day
it maybe should also worry about experiment start and end.
See the discussion of the possible optimization modes in the section
on `OPTMODE` for more information on
`OPTMODE=HAS`

**Argument:** Any real hour angle - in seconds.
**Options:** Any
**Default:** 1800.0
**Usage:** Uses the most recent value specified.
**Example:** `OPHLIMTI = 1200.D0`

Craig Walker
2014-04-14