Local service for houses or buildings could be provided service with limited power signals under rules for low power devices / FCC Part 15. Yes, you would need

Local service for houses or buildings could be provided service with limited power signals under rules for low power devices / FCC Part 15. Yes, you would need hardware to get your satnav (or mobile phone) signals and create the replacements for your LF/MF/HF dependent devices. You have to ask yourself, "Where is the point of diminishing returns in retaining dependency on signals like WWV / WWVH?" By the way eLoran will probably be the terrestrial back up for GNSS based position / navigation / timing. Also, if we get to the geopolitical state of satellites being destroyed, there will be a truckload of larger problems to worry about. Any nation with the hubris to destroy GNSS birds deserves the nukes they suffer in return. Any nation who lets it happen, because the leader is numbnutted, deserves to suffer a breakdown for not being more mature in managing its geopolitical situation. Fifth Risk indeed.