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I'm not reading this thing, but maybe it's got something you can use :-)
http://www.geomatics.ucalgary.ca/~cannon/99NTMJR.pdf -- "Peter" wrote in message ... Gary S. wrote: On 30 Jun 2004 13:00:23 -0700, (David Harper) wrote: I was wondering what effect aluminum foil (used as a radiation heat shield) would have on GPS signal reception? The scenario is a small payload container (approx 10" cube) covered in polystyrene, with a handheld GPS reciever located near the top on one corner. Would aluminum foil on the inner sides (and/or bottom) interfere with the reception of the signal? I'm worried about possible reflection or other mechanisms of interference that might occur and prevent good reception. Basically, my question is, would foil on the sides or the bottom pose a reception problem? I'd expect this to be alright as long as the GPS antenna still has a clear view of most of the sky - i.e. if you imagine your eye being at the location of the antenna, it should be able to directly see most of the sky without needing to look through any aluminum foil. Multipath problems from reflections tend to be more of an issue when the direct path is blocked so the receiver only gets the reflected signal and when the path length of the reflected signal is substantially different than it would be for the direct signal. Neither would be the case here. There could still be some destructive interference from reflected signals but that problem is minimized if the direct signal path is unobstructed and therefore the strongest signal and by the selective antenna gain for signals of the proper circular polarization. |
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