Position, navigation, and timing alternatives¶

Materials on GNSS-independent or complementary positioning and timing: broadcast timing (BPS), historical/definition notes on LORAN, and practical frameworks for trackers when GPS is degraded—adjacent to Time synchronization — NTP and PTP sources but focused on where the time/position comes from when satellite navigation is not enough.

Source notes

• source-notes/bps-gps-alternative-geerling.md
• source-notes/loran-definition-tme.md
• source-notes/how-to-design-trackers-without-gps.md

Related

• Time synchronization — NTP and PTP sources — GNSS-disciplined clocks and NTP/PTP lab builds
• Field network IoT comparisons (HaLow, LoRa, NB-IoT)