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#11
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"Tarver Engineering" wrote in message ... "Bill" wrote in message m... Where online can I find a list of countries meeting the WGS-84 GPS standards? WGS-84 is not a GPS standard, but the Earth model for great circle long range navigation. It's not that either. It's a mathematical formula for approximating the shape of the world. GPS and many maps use it. |
#12
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"Ron Natalie" wrote in message m... "Tarver Engineering" wrote in message ... You might want to see the long range Nav RTCA document. In fact, the equation is the one used in the FMS and is certainly exactly as I wrote. RTCA does not define WGS-84. What RTCA does is apply WGS-84. It is for that reason that some automation does not operate properly in Countries not using the WGS-84 Earth model. They may reference or use it in their standard, but that doesn't really have anything to do with the original question. It is the reason for the question, Ron. While use of the WGS-84 ellipsoid parameters would be handy for computing great circle numbers, your statement as a whole is nonsense. Thing before you post, Ron. John P. Tarver, MS/PE |
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