GPS Spot Part 2

So at least one of you managed to read yesterday's entry about the GPS SPOT and then read my posting on the Sun SPOT Forums about it and ask about the 31' skew I encountered.

True enough, I found that the GPS receiver was off by 31' (minutes) in its location. At least, 31' was my estimation based on looking at a bunch of reading and then doing a lookup of my address. My new theory is that it is actually a factor of something called the 'GEOID Separation.' The GPS Unit puts out a value for this at 33. So, I surmise that my receiver data needs to be 'adjusted' by the GOID Separation value, and that my estimation of being off by 31' is actually off by 2' itself, and that if I adjust by the GEOID Separation value of 33, I will be right on.

I have not tested this, but it may be correct.

If anyone knows a lot about GPS data, and all that stuff, please feel free to let me know if I am correct, close to correct, or wildly off-base and making myself look foolish. :-)

[Millihelen, adj: The amount of beauty required to launch one ship. ]

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