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In April 2020, I presented a talk on understanding GPS in contested environments. Topics included the following:Understanding GPS position error, dilution of precision and user range errors, physical and radio visibility, terrain heights and field results, mitigation techniques and alternative navigation technologies.

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What ever you call them; truisms, mores, rules to live by, golden rules, the feeling is the same. These are simple guidelines. They can be followed easily, but not without courage, strength and the ability to see beyond yourself, for the good of all.All laws must be based on a set of values that work for individuals and large societies.