My Problem Page:
T-POINT.....
I have recently started to use Software Bisque's TheSky and T-Point....
One of the things that I have come accross while using the programs is that
the LX200 usually only use pointing information accurate to ten's of arc seconds.
In a recent page on the Bisque site a method of mapping using Orchestrateis
presented......and in that page it says to send a command :U# to the LX200
via the terminal panel available in TheSky...
If I do this...send the :G# command it would appear to allow more accurate
pointing to the arc second...and it does
But it hangs up the programs.....not completely....Just seriously slows things
down....for example....If I select a drop down menu....it dosen't drop down
until I drag the mouse down over where it would appear....
If I click on Map a point ....the computer dings but unless I click, down
on the Windows Status ba,r at the bottom of the screen....I get no confirm
Map box to appear.....same goes for centering, or slewing....anything that
should bring up a second box or confirmation seems to wait for a second click.....
When this happenend first I got an error......insufffiecient stacks.......anyone any ideas how many stack I need and where, config.sys...autoexec.bat or whereever...I should stick Stack=10 or whatever, or was this a blind alley.
Your comments appreciated
SEEING:.............and fwhm.....
This is something I am only getting to grips with.
I understand that at F10 my 10" on an ST7 at high resolution (9 microns x 9 microns), each pixel then covers an area of 0.75 arc seconds...
If I change the F ratio to say F5, using a reducer.....or as someone I read called it a 'Field Cruncher' each pixel in high res covers an area of 1.5 arc secs....
So Seeing..........When I read of the images taken by other and that they
were able to determine the seeing at 2 arcs second.....I am intrigued as to
how!
Is it as easy as looking to see how many pixels a star covers.....But brighter
stars ...in my images....seem to cover more pixels than fainter ones.....
If I use the crosshairs in CCDOPS...I get a reading of seeing....but I don't
understand what I am reading!
Can I obtain a value for seeing from another progam...CCDSOFT...
As for fwhm.....field width at half maximum....OK I think I understand that......How many pixels dose the image cover if I only measure the peak 50% of brightness....This seems to me to be a measure of how well the tracking, alignment and seeing is.........If it is a small number .....then things are holding up well....
If is a large number.....is that an indication to Bin 2x2 or 3x3 as I am
wasting my time.....
Any Comments.