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Navigator
 
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Default First Sailing Topic For 2004 . . for me



DSK wrote:

DSK wrote:

I'm not sure why that is, ghost returns seem to come & go even on the
best set ups. Multiple returns can be a timing problem, can you
adjust the rotation of your 10cm set?

Navigator wrote:
Please explain this statement.



I don't claim to be an expert on radar (like you do with so many
things). However, a ghost image is most often a secondary (or more)
return from a real object, so you see them 180 degrees from the real
return, and/or at some multiple of the distance. If you adjust the sweep
rate or rotation, that seems to make them better... if not disappear,
they at least get smaller. I'd guess the time of the return will come at
a different angle to antennae and not produce the ghosts.


This makes no sense to me. The radar does not have significant rotation
(certainly not 180 degrees) between pulse emission and reception.
Where's Gilligan!

Cheers