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Day/Night On Far North/South Flights  
User currently offlineAirplanetire From United States of America, joined May 2001, 1809 posts, RR: 2
Posted (11 years 5 months 2 weeks 4 days 17 hours ago) and read 2243 times:

On routes that fly very far north or very far south, at certain months of the year when these planes are flying, will it stay light or dark (light on night flights like NRT-JFK in summer, dark on JFK-NRT in winter) for the parts of the flight passing flying very far north? I have noticed on all three of my eastbound transatlantic flights a faint light through the whole night off the north facing side of the aircraft. At least I think I have  Smile. I don't mean just a little bit though like that where it is definately dark, but there is a light on the horizon. I mean pretty light. Here are some routes that either are currently flown, or have been flown in the last year that I had in mind that could fall under this category:




-Airplanetire

7 replies: All unread, jump to last
 
User currently offlineUal747 From , joined Dec 1969, posts, RR:
Reply 1, posted (11 years 5 months 2 weeks 4 days 14 hours ago) and read 2197 times:

About 2 years ago I flew PEK-ORD and the sun was on the horizon the entire flight off to the north. It was like there was a sunset for about 7 hours. We left PEK in the afternoon and arrived at ORD in the afternoon. The sun set a bit after we left, just until it was a bright orange glow on the northern horizon, you know the time when the sky is prettiest, then it rose again as we came down over northern Canada was we made our way to Chicago.

UAL747


User currently offlineAirplanetire From United States of America, joined May 2001, 1809 posts, RR: 2
Reply 2, posted (11 years 5 months 2 weeks 4 days 12 hours ago) and read 2173 times:

That sounds really nice! Thank you for your reply. What time of the year was that flight?

-Airplanetire


User currently offlineUal747 From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 5 months 2 weeks 4 days 12 hours ago) and read 2167 times:

It was during the summertime.

UAL747


User currently offlineL-188 From United States of America, joined Jul 1999, 29813 posts, RR: 58
Reply 4, posted (11 years 5 months 2 weeks 4 days 12 hours ago) and read 2161 times:

Just about any route in Alaska during the summer and winter respectively.

Two nights ago I had to look at sending a Medevac from Anchorage to Northway. Up there this time of year there is no civil twilight hours. On the other hand I sent an aircraft to Seward, and the civil twilight ends and started at 1:00 AM and 3:30 AM respecively.

Also note that the higher in latitude you go the longer the dusk/dawn is. I think it has something to do with the angle the sunlight is hitting the earth. Anyway because of that in Alaska, you can conduct operations Civil Twilight to Civil Twilight, rather then Sunrise to Sunset.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineJetCaptain From Canada, joined Dec 2000, 236 posts, RR: 1
Reply 5, posted (11 years 5 months 2 weeks 4 days 11 hours ago) and read 2148 times:

Check out this website:

http://www.fourmilab.ch/cgi-bin/uncgi/Earth

You can look at the earth from different angles at different times of the year, specifying the exact date, time, angle, and distance you want to look from.

Using flight schedules and that great circle finding website you should be able to figure out whether the flight will be operating in darkness or sunlight.

http://www.amadeus.net/home/en/flightinfo_en.htm

Some other flights to add to your map would be YVR-FRA,LHR and LAX,SEA-SVO, and the freighters that operate between ANC,FAI and Europe.

JC


User currently offlineAirplanetire From United States of America, joined May 2001, 1809 posts, RR: 2
Reply 6, posted (11 years 5 months 2 weeks 3 days 21 hours ago) and read 2069 times:

Thank you for all of your responses! I would have loved to have included more routes because especially on flights between the west coast of North America and Europe, there are a bunch of flights that reach latitudes that are very far north. Can you think of any other routes that reach far southern latitudes? The closest besides those two that I put there are between South Africa and South America, but those do not go quite as far south.

-Airplanetire


User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 7, posted (11 years 5 months 2 weeks 3 days 17 hours ago) and read 2026 times:

Presently operated by ARG 340 aircraft is flight between Rio Gallegos ARG and Auckland NZ which hits close to latitude 75º South... Right now it is winter in this part of the world, the flight is almost entirely night... in December and January, our summer, it is entirely a daylight flight...
xxx
(s) Skipper


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