Jonah, Thanks, that first link seems to answer my immediate question about reference location and calculating time between sensors. Thanks for the pointer, I should have been able to easily find such a key piece of the puzzle. https://pycbc.org/pycbc/latest/html/detector.html My son, Ben, set up a Linux server with Python and ran some samples. I found
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https://www.researchgate.net/publication/327939317_Persistent_luminescence_instead_of_phosphorescence_History_mechanism_and_perspective/comments Enjoyable read with many thoughtful ideas and descriptions. There are several energy sources for these photon flows, but thermal energy harvesting over long periods, then optical photon emission for shorter periods seems to be the theme. The energy stored in electronic states. I am posting this on 18 Apr 2021: “persistent luminescence” has
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Ben, I read your description and it is clear. I want the flexibility for myself. If the environment and tool it rigid, I know that I won’t be able to build the things I want. That includes (G) gathering and organizing things, (E) exploration and mapping new kinds of things (C) comparison and classification (S)
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https://www.youtube.com/watch?v=mvKrwSNy69Q The rovers have x-ray spectrometers to determine elemental compositions of Martian rocks and materials. https://mars.nasa.gov/mer/mission/instruments/apxs/ https://en.wikipedia.org/wiki/Alpha_particle_X-ray_spectrometer Ralf Gellert is the principle investigator for the Curiosity APXS. I suppose you could ask him if they checked. They probably are doing random samples of everything, and might be able to estimate elemental abundances, including gold, in
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