LORAN-C And e-LORAN

Basics

• LORAN-C was a radio navigation system before GPS which allowed a receiver to determine its position by listening to low frequency radio signals transmitted by radio beacon base stations.
• They essentially sent out blips like GPS, and the device did the calculation based of the beacons' prerecorded location, and the time delay of the different signals.
• A new version has been explored called eLORAN which uses more modern systems (Such as networking between radio base stations for time syncing, and error correction for improved accuracy.

Frequencies Used

• Loran-C operated in the 90 kHz to 110 kHz frequency range (This is commonly categorized as "Low Frequency" a group from 30 kHz to 300 kHz)

Possibly Antennae

Prebuilt

• 30KHz to 30,000KHz Overbuilt, Goes From 30KHz to 30,000KHz. It is an Active Loop Antennae

DIY

• Loop Antennae
• Rhomboid Antennae

Provides

• Easy DIY GPS Like Navigation in Under-served Areas
• Redundancy to GPS Navigation
• Possibly Cheaper, Simpler, and More Precise Navigation (All that is needed for reading could be as simple as an antennae and an oscilloscope for manual, or a simple Arduino circuit and an antennae for automatic
• Benefits Automation like the Open Source Robotic Tractor

Internal Links

• Satellite Navigation System
• Differential GPS / RTK GPS

External Link

• The Wikipedia Page on All forms of LORAN C was the last widely used version, e is being investigated, and has some current niche use
• The Wikipedia Page on LORAN-C Specifically
• A Page with Instructions Detailing Antennae that May Work