Smart tattoo tracking range and technology: Is 180km direct tracking possible?

The discussion centers on the feasibility of directly tracking smart tattoos over long distances, specifically up to 180 km. Current "smart tattoos" primarily involve passive technologies such as color-changing inks responsive to temperature or glucose levels, without embedded active electronics or wireless communication capabilities. Direct tracking would require integrated electronic components capable of emitting signals detectable over wide ranges. Challenges include the miniaturization and flexibility of electronics suitable for tattoo integration, potential use of nanotechnology to embed stretchable, flat electronic circuits, and the need for communication methods that can bypass or utilize existing mobile networks or satellite frequencies. Mobile networks are encrypted and controlled by service providers, complicating direct signal pinging. One referenced development is Fujitsu's work on related technology, though details are limited. The concept remains largely theoretical, with skepticism about current practical implementation.
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