China's lunar orbiter captures Earth's images during solar eclipse

Discussion in 'Amateur Radio News' started by AG4YX, Jul 6, 2019.

ad: L-HROutlet
ad: l-rl
ad: MessiPaoloni-1
ad: Left-2
ad: Left-3
ad: Subscribe
ad: L-MFJ
  1. W1YW

    W1YW Ham Member QRZ Page

    The absence of stars is caused by the limited dynamic range of the imaging systems used. Both were, relatively, short exposures.

    Try taking a full moon photo with your digital camera, so you can see the fine detail of the surface --and you will have a similar issue.

    Our eyes do a better job on tackling the problem of very bright versus relatively dim.

    This is independent of any scattering from atmosphere, which further limits dynamic range, except at high altitudes.

    BTW, if you decide to climb Mt Everest, a large swath of sky is approaching BLACK rather than scattered-light BLUE. The photos you see on this are realistic. And you can see a FEW stars during the day.....
     
    Last edited: Jul 7, 2019
    K8XG and W4RAV like this.
  2. WR2E

    WR2E Ham Member QRZ Page

    Probably, but I don't understand why the shadow appears to be round at the angle it's hitting Earth.

    Shouldn't it be oblong?
     
  3. W1YW

    W1YW Ham Member QRZ Page

    The 'realistic' comment was respect to Mount Everest :)

    Probably a distortion caused by being off-normal to (sphere) surface... a good example is...


    [​IMG]
     
  4. WR2E

    WR2E Ham Member QRZ Page

    Yeah, the world often looked like that in the sixties!

    I cherry picked my quote, sorry about misdirecting.

    The more I look at the original photo the more it looks like a possible composite to my eye.

    Can't put my finger on it, just something "not quite right" about it.
     
  5. W1YW

    W1YW Ham Member QRZ Page

    The dynamic range is a bit poor, but if its a fake, its not a very good one:)!

    Keep in mind there is stitching messing up the shading subtelties. The lunar surface 'stitching' is readily apparent on my de-blurred version, for example. So, technically, it IS a composite:) That's expected because the microsats have limited buffers and send sections of the image at a time, I presume.
     
    KO5V and WR2E like this.
  6. W6UXB

    W6UXB Platinum Subscriber Platinum Subscriber QRZ Page

    Phil, ARSENAL all the way!
     
  7. NA5XX

    NA5XX Ham Member QRZ Page

    Or not enough light in the exposure to pick them up.
     
  8. W4RAV

    W4RAV Ham Member QRZ Page

    Thank you for that kind reply! I was going to say something similar, but wouldn't have been as nice.

    Flat and young-earthers, moon-landing conspiracy, anti-vaxers, chemtrails, religion, etc. deserve no place in an evolved mind.
     
    W4MAL, WQ4G, K6MCS and 2 others like this.
  9. G3SEA

    G3SEA Ham Member QRZ Page

    A ' Gooner ' Ham ! :cool:

    G3SEA/KH6
     
  10. K8AI

    K8AI Ham Member QRZ Page

    Lighten up Francis, my comment was tongue-in-cheek.
     
    K7GYB and W1YW like this.

Share This Page

ad: M2Ant-1