If the disto in a housing works, I will give up traditional underwater methods altogether and us my Disto-X. I would be VERY interested to hear what the results of that will be, though I can't imagine that it will be good what with backscatter and all.
Jason
almost there... working on too many simultaneous projects...
will report back shortly...
cheers, JDZ
Looks nice, can't wait for your test results. I suspect you will need to take a few readings compared to a tape, and come up with a conversion factor.
Most people would consider a Leica to be more accurate than a tape. I've never heard of anyone converting their Disto values in a dry cave.Originally Posted by FW
The plastic of the housing could, conceivably, distort the readings, then I'd just compare the housed versus unhoused Disto readings.
It is more like the water will change the speed, and thus the timing of the echos. Hopefully it will be linear. I am not to sure that the diffraction won't big a big issue, too.Most people would consider a Leica to be more accurate than a tape. I've never heard of anyone converting their Disto values in a dry cave.
The plastic of the housing could, conceivably, distort the readings, then I'd just compare the housed versus unhoused Disto readings.
Good point. But do you usually use a tape to survey? I thought most people used knotted line? If I weren't desperately behind at work right now, I'd zip out the calculations. But I'll bet in the distances we see in caves, the change in speed would be in the noise.
For rough surveys, we use knots, but for the fancy maps of clear FL caves, they use tape.
Which ones? Enquiring minds want to know!
For Crappier vis Canadian caves they use tapes too
All crappy and non-crappy Tn caves get taped as well.
J
Posting Permissions
Reply With Quote
Bookmarks