Sun/Moon Rise/Set

[OleShep]

Does anyone know of a trick or list of Sunrise/Sets Moonrise/Sets times? It is a little tedious to keep tweaking the date/time to get the desired conditions.

[ade_mcc]

Interesting...

A quick search on Avons FAQ (Cheers Avon! ) provides the following information...

Speaking of day and night, as the time changes while playing a mission, so do the positions of the sun, moon and stars. It's all quite accurate, actually, with the islands being based at a latitude of 40 degrees north and standard time in effect. You can watch sunrise or sunset and the tide going in and out accurately. You can even navigate by the constellations at night. Impressive, ain't it?

Ive no idea if by standard time she means 0 degrees Longitude, but assuming for the moment that she does, then we should be able to plug the data into an online sunrise/set calculator, for example...

Example (http://aa.usno.navy.mil/data/docs/RS_OneYear.html)

And get some values to check. Note the definitions of twighlight if this is the effect you are looking for..


Quote[/b] ] Civil Twilight
Civil twilight is defined when the sun is 6 degrees below the horizon. This is the limit at which twilight illumination is sufficient, under good weather conditions, for terrestrial objects to be clearly distinguished; at the beginning of morning civil twilight, or end of evening civil twilight, the horizon is clearly defined and the brightest stars are visible under good atmospheric conditions in the absence of moonlight or other illumination. In the morning before the beginning of civil twilight and in the evening after the end of civil twilight, artificial illumination is normally required to carry on ordinary outdoor activities.

Nautical Twilight
Nautical twilight is defined when the sun is 12 degrees below the horizon. At the beginning or end of nautical twilight, under good atmospheric conditions and in the absence of other illumination, general outlines of ground objects may be distinguishable, but detailed outdoor operations are not possible, and the horizon is indistinct.

Astronomical Twilight
Astronomical twilight is defined when the sun is 18 degrees below the horizon. Before the beginning of astronomical twilight in the morning and after the end of astronomical twilight in the evening the sun does not contribute to sky illumination; for a considerable interval after the beginning of morning twilight and before the end of evening twilight, sky illumination is so faint that it is practically imperceptible.

So, first, we need to establish if the Longitude values are correct....


Edit: a quick search of the forums reveals...


Quote[/b] ]From the research labs, I have determined:

Equinox days: Approx sunrise 6AM, sunset 6PM
there is 2:30 of additional sunlight during the summer solstace (1:15 each way) and 2:30 of less sunlight during the winter solstace (1:15 each way).

Cheers olseric! (from post August 14th 2004)

Edit 2: For interesting reading check the below linky from 2002!

Linky (http://www.flashpoint1985.com/cgi-bin/ikonboard311/ikonboard.cgi?act=ST&f=7&t=20920)

Cheers Suma!

[OleShep]

very good info.. I created a couple of tables for 1985. I'll play with them a bit and see if they seem to be in the ball park..

[Daddl]

Local standard time means that at 12 o'clock the sun is at the highest point, with the shortest day being the 21st of december and the 21st of june the longest. Not sure if the engine only simulates the northern hemisphere or whether this would actually reverse if an island were given coordinates for a location in the southern hemisphere.

[NAXAKSTA]

My brain hurts now. I will just fiddle with the time settings http://forums.bistudio.com/oldsmileys/crazy_o.gif

[OleShep]

Well I went to the website mentioned above and printed out sun and moon charts for 1985 40Lat-0Log ZULU time and they do appear to be accurate. I picked a day in Aug with a full moon and set the mission time accordingly and VIOLA.. full moon..