Sky High

Looks like I was close at 2000 ft. One thing I have also noticed is that when I'm watching the actual helo, it seems higher then than it does when watching the video afterwards. I always seem to say to myself after a flight, I thought I was higher than that?

Sky High

I think I'll make a 300 ft string with notches every 10 ft and then tie it to my helo and send it up. I'll know for sure then.

Sky High

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Sky High

How high would you say these are?

A10FLYR

My Feedback: (1)

I'd like to know the results...

whogdriver

Ok guys, guess the altitude time is here. Write your answers down, I'll post the same pics with the altitudes unblanked later. (These are stills from a BWAV system with a 72 degree FOV CCD camera)

A10FLYR

My Feedback: (1)

Here's where I make an a** out of my self but it's fun! And no doubt will be enlightening...

#1.....150'
#2.....250'
#3.....300'
#4,6,7....1000'-1500'
#5.....400'
#8.....800'

All guesses are AGL!!

Now that I've committed how about the rest of you??

bdavison

My Feedback: (1)

Never got over 700 ft.

1 = 100ft
2 = 200ft
3 4 5 6 7=350 ft
8 = 650ft

twinturbostang

The picture of the football field is actually pretty easy. We need to know one piece of information... FOV of the lens. The rest is all geometry/trig.

twinturbostang

whogdriver: Don't know the heights, but I'd say pic 7 is the highest, by far!

A10: I disagree with your measurements. I think pic 5 and 8 are at roughly the same altitude.

lvspark

400'

slagburn

How about this one?


Took off @ 5400 feet, the rock formation on the right is 7255.

kd7ost

It's so hard to tell on obliques. They look like miles when they aren't.
I would say you are about 7255?

Dan

slagburn

Not oblique, the camera is tilted up parallel to the fuse in that pic.

edit: or is that still considered oblique? by the way Google Earth puts that rock right at 2 miles from the plane.

kd7ost

No actually not. An oblique is between horizontal and vertical. Then I say your altitude is 1855 feet AGL.

Dan

Sky High

The camera is mounted on the airframe 90 degrees straight down like the U2 or Blackbird. Everything else is classified.

A10FLYR

My Feedback: (1)

Hey Bryan,
I wish you would have waited a little longer before giving us the answers but then you haven't shown the pics with the full overlays! I was going to submit a few, one from a Skylane and one from an airliner 20K' with a telephoto lens but can't find 'em.

I put the stripes on the bottom of my camera plane wing and hope to try it tomorrow. We are going to measure on the ground first.

bdavison

My Feedback: (1)

Actually,.....those werent my pictures....the answers still havent been posted.....

those were my guesses.

Whogdriver was the poster of the pics....he hasnt posted the "correct" answers yet.

A10FLYR

My Feedback: (1)

Duhhhh.....I knew that I need to pay more attention!! Give me a minute and I'll think of an excuse.

whogdriver

OK guys, here are the altitudes, A10FLYER, not too bad on the guesses!

TWINTUROSTANG, you're right on pics 5 and 8, real close.

Sky High

Thanks for those images. They will be great refrences. Comaring the size of the lane markers and the lines in the lot, I think I was definitely at around 200 ft at my highest point in that parking lot. I think that I was about 350-400 ft at that stadium.

kd7ost

Don't forget though, that only holds true if you're both using the same FOV and similar camera. A wider FOV will look farther away and a narrower FOV will look closer.

Dan

sxates

How do you even SEE your plane at 1500 ft? I hope its large!

whogdriver

You have to keep it almost directly overhead when that high, and it looks real small.

twinturbostang

...And I said that pic 7 was WAY above all the other ones... which it apparently was.