----- Original Message ----
> From: Mon Sarmiento <sarmientomon@...>
> Lag may not be an issue here as Brent's program computes for
current coordinates for the satellite and does a realtime comparison with
mount's reflected coordinates. If there are discrepancies,
Satellite tracker Program makes the necessary speed adjustments and
attempt to equalize the mount's reported coordinates with the one that
computed. If there is a Lag in the position, program simply makes
motor rotate faster. If the position is ahead of the current,
simply makes the motors rotate slower. That simple. User then will have
jog the Sat Trackers' coordinate compensation buttons to center
satellite on the eyepiece.
I think you misunderstood. This is just where the lag happens- when I need to make a correction. I think Brent has said it is due to slow response by the LX200GPS, which has a slower processor than the LX200 classic, but more complicated firmware. I know from using other software with the LX200GPS that there can be annoying delays in some functions.
> Even with the mechanical and software
it is very easy to compensate for the position.
From what you say below, it's not clear you ever used the software with an actual LX200GPS, which seems to be where the problem lies, not in Brent's software.
> We actually developed an LX200 GPS Protocol to ASCOM
converter called EQMODLX which allows Brent's program to communicate with
ASCOM compliant mount driver and issue the necessary custom rate
commands to the mount and had greate success considering the
incurred in the software command conversion process.
> Just our two cents.
> John Mahony wrote:
> ----- Original Message ----
> > From: autostaretx
> > --- In email@example.com, John Mahony wrote:
> > >
> > > At the local observatory we recently upgraded from an LX200 classic
> > > to an LX200R. From my own experience and from other discussions
> > > here I think you're better off using the Autostar's own built-in
> > > satellite tracking feature. With Brent's program and the GPS/R
> > > models, when you need to make tracking corrections, there is a
> > > severe time lag before the scope reacts to them. But using the
> > > scope's built-in sat tracking, control with the keyad is immediate.
> > > Brent's program is still useful for knowing when and where various
> > > passes will be.
> > Try using the -real- handbox slew keys to tweak the positions,
> > even when being commanded by SatTrack.
> I remember trying that early on but I wasn't sure how it would
with SatTracker's operation, so I didn't experiment too far.
definitely try it again, since I certainly agree that the Austostar
built-in method is curiously inaccurate. Even though the
corrections work well, the sat is almost always steadily drifting towards
edge of the FOV, so I have to apply corrections almost constantly.
recall you once said that the simpler autostar (non LX200) scopes
track satellites very well, so I wonder what the difference is.
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