1. ki_cz

    ki_cz Member

    Taken near Palo Alto California, around 10:30PST, 14.03.2017 (unfortunately not my photo). KehtOyJbrKP0CkDTdqf7UwykOJ9KfdEY9HRfE1Bd7Pg.
  2. Miss VocalCord

    Miss VocalCord Active Member

  3. Trailspotter

    Trailspotter Senior Member

    Do you have access to the original photo? If yes, could you please post its Exif?

    My educated guess is these three flights:
    Screen Shot 2017-03-15 at 11.57.52.

    As the middle plane was at a lower altitude of 32,000 ft than the other two (at 36,000 ft), the three planes would appear more evenly spaced.
  4. ki_cz

    ki_cz Member

    Thanks for the help, I will try to get the EXIF data from the person who posted it.
  5. SR1419

    SR1419 Senior Member

    Interesting to note, the contrails do not appear to be persisting...in case people were claiming "chemtrails".
  6. TEEJ

    TEEJ Senior Member

    Could it be a military flight? This footage is from Petaluma which is to the north of Palo Alto and San Francisco.

  7. Mick West

    Mick West Administrator Staff Member

    I assume you mean 10:30AM PDT? i.e. 18:30 UTC?
  8. Mick West

    Mick West Administrator Staff Member

    Seems too far away, about 100 miles there.
  9. Trailspotter

    Trailspotter Senior Member

    Shouldn't be a problem for long lenses, unless hidden behind local geography. This is one of the reasons I requested Exif.

    The other is that I suspect this is a 'trick' shot - an overlay of three sequential shots of the same contrail. Deflected from the plane track by wind, such a multiplied contrail makes a series of staggered parallel lines. I've seen this technique before, for example:
    [​IMG]series2-3.psd by Gordon Dunn, on Flickr