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-   -   wrong readings with sextant in Wolves of steel (https://www.subsim.com/radioroom/showthread.php?t=224457)

VentHorizon 02-20-16 08:21 AM

wrong readings with sextant in Wolves of steel
 
Since i dont want to necro a 3 years old thread i will just ask like this. I hope its ok.

Using wolves of steel megapack. (properly installed)
Using sextant to measure my position at the start of the Historical mission: Balloon test mission 14 oct 1939 12:00 GMT
REAL Location N 58°57' W 2°59'

12:00 GMT

Readings: Altitude 21°56'
Zenith: (89°60' minus 21°56') =68°4'
Sun declination for 14 oct 1939 :south 7°54'
My latitude: zenith minus declination =61°50' (that's way off)

what am i doing wrong?
Could this be due to my screen resolution (aspect ratio) : 16:9
Wolves of steel default aspect is set to 16:9.

vdr1981 02-20-16 09:01 AM

Hmmm, Sjizzle? :hmm2:

Sjizzle 02-20-16 10:30 AM

Quote:

Originally Posted by vdr1981 (Post 2382927)
Hmmm, Sjizzle? :hmm2:

let me check it cos for me the sextant work great and all celestial objects are 99.9 accurate.

Edit:

the sun position at that date is at azimuth +164 degree and and altitude of 23.10 degree
so 89.6-23.10-7.54 = 58.96 this one without any sextant correction :D

PS.i have check it also with stellarium and is 99.9% accurate :D

VentHorizon 02-20-16 11:29 AM

1 Attachment(s)
Quote:

Originally Posted by Sjizzle (Post 2382954)
the sun position at that date is at azimuth +164 degree and and altitude of 23.10 degree

Did you check it in the Historical mission: Balloon test mission?
There might be a problem with Historical mission dates. The ones showing 11:00 GMT actually start at 23:00 GMT (but its day, and sun is in the sky)
Maybe i should not use Historical mission for this exercise.
Here is what i get in Balloon test mission.

vdr1981 02-20-16 11:34 AM

Quote:

Originally Posted by VentHorizon (Post 2382986)
Did you check it in the Historical mission: Balloon test mission?
There might be a problem with Historical mission dates. The ones showing 11:00 GMT actually start at 23:00 GMT (but its day, and sun is in the sky)
Maybe i should not use Historical mission for this exercise.
Here is what i get in Balloon test mission.

Test it in the campaign please. Time in single missions is somewhat strange.

VentHorizon 02-20-16 02:30 PM

1 Attachment(s)
Campaign:

03 sep 1939
Nautical 12:00
time 11:00 GMT+1
Real location: N 54° 40' E15° 16'

Readings:

Alt 40°13'
dec 7°47'
zen 49° 47'
lat 57°34'

Am I still doing something wrong? i took multiple readings.
I'm reading bottom of the sun, at the correct time. :wah:

EDIT: new reading in the attachment.

vdr1981 02-20-16 04:15 PM

Quote:

Originally Posted by VentHorizon (Post 2383032)
Campaign:

03 sep 1939
Nautical 12:00
time 11:00 GMT+1
Real location: N 54° 40' E15° 16'

Readings:

Alt 40°13'
dec 7°47'
zen 49° 47'
lat 57°34'

Am I still doing something wrong? i took multiple readings.
I'm reading bottom of the sun, at the correct time. :wah:

EDIT: new reading in the attachment.

What is your display resolution?

VentHorizon 02-20-16 04:31 PM

16:9 1920x1080

I think the problem is that i did not calculate corrections for the apparent local noon, and instead was blindly measuring at 12:00.
I will try to do those corrections and see what Ill get.

vdr1981 02-20-16 04:39 PM

Quote:

Originally Posted by VentHorizon (Post 2383058)
16:9 1920x1080

I think the problem is that i did not calculate corrections for the apparent local noon, and instead was blindly measuring at 12:00.
I will try to do those corrections and see what Ill get.

Cpy...:up: Cant help you much though because I still haven't learned how to use full real nav... :oops:

Sjizzle 02-20-16 05:43 PM

Quote:

Originally Posted by VentHorizon (Post 2383032)
Campaign:

03 sep 1939
Nautical 12:00
time 11:00 GMT+1
Real location: N 54° 40' E15° 16'

Readings:

Alt 40°13'
dec 7°47'
zen 49° 47'
lat 57°34'

Am I still doing something wrong? i took multiple readings.
I'm reading bottom of the sun, at the correct time. :wah:

EDIT: new reading in the attachment.

according to stellarium the sun at that date must be at 43.09 degree and the declination is 7.49..... on this computer i don't have sh5 installed but till tomorrow evening i will do also some testing with twos and my modlist which one is based on sober mod list and i will let u know....

a really good videos about celestial navigation here

PS. Try to measure from the middle of the sun i think that tdw has changed something in camera.dat since i have made that navigation tutorial i am not sure or my memory's is playing with me now ....

DieReeperbahn 02-22-16 07:25 AM

What does Set Reference Azimuth do? I noticed clicking that has a different effect, but how to use it?


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