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Question?

Old 10th Mar 2014, 22:37
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Question?

For Airline Pilot Peeps
A while back I set up a high rez low light cctv camera during one of those meteor showers (not a sausage)pointed skywards wide angle covers almost from zenith to western horizon.
Anyway,though I see no meteors what it does see at night is aircraft taking off from Newcastle and heading West,or rather the strobes of same,
One is puzzled,these strobes dont seem to flash in a regular pattern,just watched one,six regular flashes,a pause then one flash a pause and then four flashes,safe to assume these aircraft are not maneuvering wildly masking the strobe,noticed this before on clear night but tonight being a tad bored it stirred one's curiosity.
What is occurring here? is there a protocol on flashing your strobes in code or summat like lighthouses?
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Old 10th Mar 2014, 22:46
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Maybe you were looking at flight 614 westbound from Newcastle?
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Old 10th Mar 2014, 22:56
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Flight 614? I know not Mr Hill, tiz genuine question.
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Old 10th Mar 2014, 22:59
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May I call upon the immediate banning of Herr Draper from Jetblast for a wilful and intent request for information regarding issues directly relating to aviation and the company requirements for position lights flash freq (as required by company).

Can Tony Be Beheaded actually.. With a proper sword??
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Old 10th Mar 2014, 23:02
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Best bring plenty friends one has progressed beyond edged steel.
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Old 10th Mar 2014, 23:32
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Tony, I'm not an "airline pilot peeps" but I do a bit of amateur astronomy. I've noticed similar and always put the irregular sequence down to the same atmospheric distortion that causes the shimmering effect you see against stars and planets in the telescope eyepiece. Don't know, quite possibly talking nonsense - has been known

As an aside - I always find the hype on meteor shower strike rate over optimistic - never tried to photograph them though. Think best results are done with a fish eye lens.
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Old 10th Mar 2014, 23:40
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Smoke from the exhaust . . .
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Old 11th Mar 2014, 01:34
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Strobe lights are white in color, and are found on the aircraft's wingtips. Strobes operate at a higher voltage than normal incandescent lamps by utilizing a high-voltage power supply. The power supply fires the strobe at a given interval.
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Old 11th Mar 2014, 02:17
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All of the strobes (white) that I have seen are all at a regular (steady) frequency.
Too much "broon" Tony????

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Old 11th Mar 2014, 02:46
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Irregular intervals

The camera you are using samples the picture at a fixed frequency,say 25 times a second,and only 'sees' the picture for may be 1 or 2 milliseconds.If the camera gets out of phase with the strobe,it does not see anything.
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Old 11th Mar 2014, 03:28
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The camera you are using samples the picture at a fixed frequency,say 25 times a second,and only 'sees' the picture for may be 1 or 2 milliseconds.If the camera gets out of phase with the strobe,it does not see anything.
........ironically often referred to as "strobe effect"..........
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Old 11th Mar 2014, 05:49
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"For Airline Pilot Peeps"

Alas, Mr D, an elementary error as to whom the question should be posed.

Those of the "winged sky god" occupation tend towards the "push button, it works / it don't work, thereafter I haven't a clue" philosophy.

The above may not entirely meet with universal approval as to the veracity of the statement you understand.....

This however, should go someway to answering your question along with others who know more about cameras and refracted light....

FAA Requirements for Wing-Tip Strobes | eHow

They are "interesting" bits of kit.....if you wish to continue living that is when changing one....in essence, a capacitor which chucks out " an awful lot of joules"......a bit like the spark plug that starts the engine in fact...or H.E.I.U before the pedants start, given some of the humourless species on here.
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Old 11th Mar 2014, 06:04
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I think crippen has the answerMr D
On every aircraft I've ever flown or been flown in the flashes are regular
One way of proving crippen's theory is to observe a target aircraft through the camera and directly by eyeball simultaneously.
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Old 11th Mar 2014, 06:24
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You could ask the mods to move this thread to Rumours and News where it will be analysed to its last Amstrong unit.
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Old 11th Mar 2014, 06:38
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Beadwindow, folks!


Ani fule no it's the recognition sequence exchanged by chemtrail equipped aircraft to avoid double spraying. They mind altering chemicals ain't cheap, you know....
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Old 11th Mar 2014, 07:37
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Very well one shall continue one's observations of this phenomenon,I have a very powerful strobe meself mains operated that I point out the window to annoy people walking up the road.
It is also possible that you chaps sitting in that little cubby hole at the front cannot see your own strobes and are therefore deluded as to their regularity.

I can see it now 100 years hence the teacher in his classroom telling the sprogs.
"They all laughed at Draper when he spoke of his discovery of lumps of dark matter suffused throughout the atmosphere causing strobes to misbehave,but it is that very dark matter we now hoover up to power our star ships"


Last edited by tony draper; 11th Mar 2014 at 07:51.
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Old 11th Mar 2014, 08:16
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Need to be careful there, yer Admiralship. A few miles further North and the natives would try to deep fry yon dark matter. Who knows what would happen then...
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Old 11th Mar 2014, 08:23
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A bored programmer at Airbus has probably coded a rude message in morse. Can you translate it for us Captain Drapes ?
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Old 11th Mar 2014, 08:27
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Crippen has it.

The aliasing of the strobe flash rate and the video frame rate leads to the mismatch. The camera "shutter" is closed for some of the flashes as the frame is read out. It's similar to hearing low-frequency beat tones from mismatched rotating equipment.

Failing strobes sometimes flash irregularly, but it's your camera that's doing it.
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Old 11th Mar 2014, 08:41
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Tony, as any fule kno, they're carefully-timed chemtrail bursts over targetted areas.
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