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May a "landlubber" comment? - was[ Help create better charts]
JR wrote:
Now, in northern NJ and northern Wi there are coverage gaps where the GPS can't resolve it's location, but these are a different situation as the unit tells me it can't find itself and why. Not so with the DC & Ft. Hood issues. Wayne is refusing to admit that jamming occurs, however here's a typical British NOTAM from 06-June-2007: "GPS SIGNAL JAMMING TRIALS. JAMMER LOCATED WITHIN 0.5 [nautical miles] OF 5016N 00516W (PORTREATH, CORNWALL). ACTIVITY MAY AFFECT AIRCRAFT WITHIN 6NM RADIUS FLYING BELOW FL300 [30,000 feet] ... DURING TRIAL PERIODS, GPS RECEIVERS MAY SUFFER INTERMITTENT/TOTAL FAILURE, OR GIVE INCORRECT POSITION INFO ..." Note the last part, it's not just jamming as in drowing out the signal with noise, it's more subtle than that the jamming may involve feeding the GPS incorrect position info. This, in the World According to Wayne, cannot happen and any claim that it does happen is some sort of appeal to irrationality. |
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