Hi John Thanks very much! Everything is working fine. But I have still one question. Do you have an idea how I could accurately measure the altitude of my horizon? I own a small Alt-Az-Telescope, but how do I make sure that the Azimut-direction is the right one? I mean, I only can estimate it visually with a compass. But I'd like to look up in CdC when (in clearly-sub-minute accuracy) e.g. a planet or a star appears behind a mountain to be able to prepare for events that might happen. Any idea? Maybe something with GoogleEarth?
Greetings Luzius --- In [email protected], John Mahony <jmmah...@...> wrote: > > ----- Original Message ---- > > > From: luzius.thuerlemann <luzius.thuerlem...@...> > > > > Hi John > > > > You write that the chart must be in Alt-Az to be able to show the local > > horizon. > > Yes. The display has two modes, either alt-az (zenith is up, and either > alt-az or eq grid or both can be displayed, and the horizon is shown) or > equatorial (celestial north is up, and only the eq grid can be displayed, and > the horizon is not shown). Patrick used various names for these modes, but > click the icon with the two curved blue arrows, normally in the middle of the > right toolbar. > > > I now tried to alter the Alt-numbers in the horizon_Geneve-file and saved > > it > > under another file-name...so the Geneve-file isn't overwritten. But for > > some > > reason, neither my own trial-horizon nor the Geneve-horizon is displayed on > > the > > chart. > > Also, I can only display the Equatorial grid but not the Azimutal one, > > although > > both are activated under "lines". > > That means the chart is in eq display mode. You need to switch to alt-az > mode. > > -John > > > > About my trial-horizon-file: starting Azimut is 0, ending one 359. > > > > Thanks > > > > Luzius > > > > > > > > --- In [email protected], John Mahony wrote: > > > > > > That looks like the same format as for v2.76. It's a text file with the > > alt-az numbers. See the help file. > > > > > > But even without this, there is a "default" horizon at alt=0, when you > > > have > > CdC set to show an alt-az view. So this much should work even without > > making > > your own horizon file. This (or a custom horizon, if you make your own > > file) > > will only show in alt-az display mode. > > > > > > In the "chart appearance" window, check the horizon details shown at the > > bottom. The "invisible" checkbox doesn't mean what it sounds like. It > > makes > > the sky (below the horizon) invisible, so you just see the (normally) green > > ground below alt=0. But if you uncheck it, it makes the ground > > semi-transparent, so you can see stars through the colored ground. > > > > > > -John > > > > > > > > > > > > > > > ----- Original Message ---- > > > > From: Graham > > > > To: [email protected] > > > > Sent: Wed, December 23, 2009 7:03:26 AM > > > > Subject: Re: [skychart-discussion] local horizon creation > > > > > > > > Hi Luziuz, > > > > I managed to do it in version 3 not sure about 2.76c, it like doing a > > > > html > > image > > > > map, below is the part from the help file, the contents of my horizon > > > > file > > is > > > > this: > > > > > > > > # Horizon description file for Carte du Ciel > > > > # > > > > # File format : > > > > # Azimuth(integer) Altitude > > > > # > > > > # Be sure to begin at the North horizon (azimuth 0) > > > > # Intermediate missing value are interpolated > > > > > > > > 0 25 > > > > 5 24 > > > > 10 20 > > > > 15 16 > > > > 20 15 > > > > 25 20 > > > > 30 15 > > > > 35 10 > > > > 40 24 > > > > 45 24 > > > > 50 24 > > > > 55 24 > > > > 60 24 > > > > 65 24 > > > > 70 19 > > > > 75 5 > > > > 80 7 > > > > 85 5 > > > > 90 15 > > > > 95 15 > > > > 100 10 > > > > 105 10 > > > > 110 8 > > > > 115 8 > > > > 120 8 > > > > 125 10 > > > > 130 50 > > > > 135 50 > > > > 140 50 > > > > 145 50 > > > > 150 55 > > > > 155 60 > > > > 160 80 > > > > 165 80 > > > > 170 80 > > > > 175 80 > > > > 180 80 > > > > 185 80 > > > > 190 80 > > > > 195 80 > > > > 200 80 > > > > 205 80 > > > > 210 80 > > > > 215 80 > > > > 220 80 > > > > 225 80 > > > > 230 80 > > > > 235 80 > > > > 240 80 > > > > 245 80 > > > > 250 80 > > > > 255 80 > > > > 260 80 > > > > 265 80 > > > > 270 70 > > > > 275 64 > > > > 280 55 > > > > 285 45 > > > > 290 45 > > > > 295 45 > > > > 300 35 > > > > 305 40 > > > > 310 40 > > > > 315 34 > > > > 320 30 > > > > 325 35 > > > > 330 35 > > > > 335 35 > > > > 340 30 > > > > 345 30 > > > > 350 27 > > > > 355 27 > > > > The first number is how many degrees to the right you are looking and > > > > the > > second > > > > figure is how many degrees up do you have to look to clear your > > > > obstruction, > > > > > > hope that makes sense, its a handy tool, saves you going out to see > > something > > > > that is behind a building or mountain in your way! > > > > > > > > Graham > > > > > > > > > > > > "Write your own horizon file > > > > You can write a file with a simple ASCII-editor like Wordpad or Vi to > > > > define > > > > > > your local horizon. As an example, you can open the file [installation > > > > directory]/data/horizon/horizon_Geneve.txt. As you can see from the > > > > file, > > the > > > > horizon is defined by a serie of records. Every line contains a pair of > > > > two > > > > values. The first value is the ââ¬Ëazimuthââ¬â¢, the second is > > > > the > > ââ¬Ëaltitudeââ¬â¢. The > > > > units are degrees, where azimuth 0ð is North and 90ð is the > > > > Zenith. A dot > > (.) > > > > can be used as a decimal separator. You can put comment in your horizon > > > > file > > by > > > > lines that start with a mesh (#) character." > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > From: luzius.thuerlemann > > > > To: [email protected] > > > > Sent: Wed, 23 December, 2009 11:33:44 > > > > Subject: [skychart-discussion] local horizon creation > > > > > > > > > > > > Hi there, > > > > > > > > I'd like to create my own local horizon visible from my home with > > > > mountains > > and > > > > valleys. Version 2.76c . Is that possible? I'd be happy also with a > > > > simple > > > > horizon line just that I see where my horizon lies. > > > > > > > > Thanks and CS > > > > > > > > Luzius > > > > > > > > > > > > > > > > > > > > Send instant messages to your online friends > > > > http://uk.messenger.yahoo.com > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > > >
