Technologies Beyond GPS
PROJECT EGG-DROP: An orbital reference lab which uses various extraterrestrial references (Siderial Guide Stars, Lunar Reflectors, Earth reflectors, Corner Prisms, etc.) and various atomic clocks and precision inertial platforms in order to "PUBLISH" a PERIODIC EXTERNAL REFERENCE STANDARD UPDATE, via NAVIGABLE RE-ENTRY PUCKS (which may be very small). ... These pucks are recovered and physically interrogated (high reliability data link) to correct any drift in roving reference master platforms (highest precision internal SINS). ... (lowest drift master platforms).
... The TERRESTRIAL ROVING REFERENCE STANDARDS PLATFORMS would transmit reference standards updates via X-RAY PACKET SWITCHING NETWORK ... This would be multiplexed, multi-frequency, redundant packet routing and could even be received under dense foliage.
A puck could navigate (via controlled re-entry) to a specific drop zone, as often as required (daily?) ... A naval vessel (ship or sub) would recover the reference puck (the "egg") ... The ship would transmit the reference update to a UAV or LTA platform, which would transmit reference standards updates to lower precision systems, units, and platforms.