Celestial Navigation in SH4

Hi all,

Just to inform you that the links are not working...

Regards,

L

[Pisces]

There are worksheets in in the back of the almanacs which you can find at the link he gave in a few posts back. But yeah, without a readme or tutorial it's pretty hard to grasp the technique.

Did you pm 6SJ7GT about reuploading?

[Werewolf]

So....are all the thing needed for implementing this mod in the 2 files called SH4tocellestial and the almanacs or do I need more? I seem to recall that there were more needed when this was made for SHIII

[OrangeYoshi]

Does this also delete the use of "ctrl+left click" to center the sub position on the mouse in the nav map?

Edit: I would know if the links were up. :P

[Pisces]

You still need to download the most important thing, the Stellarium planetarium program. The small sh4tostellarium program (on the filefront page) takes your location from a savegame, and sets up a config file for Stellarium for the right observation location. In Stellarium you measure the celestial object heights (altitudes) above the local horizon. Then with those numbers you must do some numbercrunching with the tables and worksheets in the back of the almanac. Then you can plot the results on the map. There is nothing that needs to be changed to Sh3/4 files. Except if you do want to hide the sub icon. But that is not required. Also no camera tweaks or interface modifications. Ctrl-click also works if you need it.

[Werewolf]

@picses

Okay, thank you very much for your reply

[berobispo]

thanks you all for developing this method! but two questions remain:

1) mike's tutorial is no longer available and although I'm a navigation fan, I'm rather a bloody beginner and no chance for me to do star sights without a tutorial

2) when using SH3, what time to I enter (when using don1reed's python script)? SH3 shows two times, "base/GMT" and "local time".

Thanks!

btw: Stellarium 0.9.0 is the version which works for me for 0.10.x doesn't support sts scripts and v0.9.1 crashes at start.

[Dutch]

Holy Cow........Fantastic work gentlemen! Would be nice to see if SHV will be a bit more modifiable in this department but out standing work as it stands here.

[berobispo]

about GMT: I made some custom missions and (I think)found out:

-normal time (time shown without mouseover) is GMT, mouseover time is sh3 timezone time. they start at 7°30' from 0° and are 15° wide. gmt and local time don't change when saving/reloading.

-when going west, the game simulates the earth's rotation pretty well, I could pinpoint my location to about 15nm just by using the charts for sunrise/sunset provided by vanjast. given the fact that i can't measure seconds and the sun's upper limb is not always easy to discriminate I find this quite good

-when going east on the other hand, things are different. I was as far as 25°E and my local sunrise occured 25 min earlier then it was supposed to at 0° <-- should have been 1h40min if I'm not mistaken. --> it is completly unfeasible to use the ingame sun to determine local apparent noon when going east

I ended up with the following plan for real navigation (one reason: current career in the med):

save a game at approxiomately local noon, run don1reed's python script and enter a gmt time that I reason to be before my local noon, go to stellarium and do a noon sight. this works a little bit of cheating because stellarium has a fixed position and the time entered doesn't change my position etc., but IMHO the best way to go. maybe I'll even try 3 star fixes, but no idea how. maybe using nautictools.de, altough I'd rather like to at least try to do the numbercrunching on my own...

[Pisces]

I uploaded all the neccesary files I could think of. My harddrive is a mess.

Bunch of files with the tutorial, almost everything you need:
http://www.filefront.com/14996485/Ce...ion-for-H4.7z/

Almanacs for both SH4 and SH3:
http://www.filefront.com/14996507/19...5-Almanacs.7z/


Updated sh4tostellarium program: reads savegame to create stellarium config file (but I think Stellarium doesn't work anymore with the config/script-file system that Mike made it for since some version.. maybe you can find an old version of Stellarium somewhere... or be a daredevil and code a new program that makes it work)
http://www.filefront.com/14996519/sh4tostellarium.7z/

Navcharts for SH4 (if you don't want to clutter the game map):
http://www.filefront.com/14996653/SH4-Nav-Charts.7z/

Leech them while they are there. It's on Filefront, so there is no garuantee how long.

[I'm goin' down]

I do not know the first thing about navigation. If the links are repaired I will take a crack at it.

[Pisces]

Well, those links are the same files that 6SJ7GT posted. You can check inside the archives and notice the dates are all from that timeframe. I never touched them.

[6SJ7GT]

Thanks for uploading a copy of my files, Pisces. I have put them in my filefront area at:

http://www.filefront.com/user/6sj7gt

I added the 1939 - 1941 almanacs to the master file. At the moment Stellarium 9.1 seems to be easier to use. When I figure out how to get the location into the newest Stellarium I'll upload a program for that, (latitude and longitude command line options don't seem to work).

Mike 6SJ7GT

[I'm goin' down]

I am go to require some serious sit down time with this program. I am lacking is fundamentals, which might be math related, but I am not sure yet.

[Pisces]

Originally Posted by I'm goin' down

I am go to require some serious sit down time with this program. I am lacking is fundamentals, which might be math related, but I am not sure yet.

Nahh, looks worse than it is. Just a matter of adding and subtracting and looking into tables if you want to do it the hard way. Use the online almanac if you like to keep it simple:

http://aa.usno.navy.mil/data/docs/celnavtable.php