LORAN-C principle, Loran-c error & Difference between ELoran and Loran-c

LORAN-C principle, Loran-c error & Difference between ELoran and Loran-c

LORAN-C principle
Loran-c works on a hyperbolic navigation system.
Hyperbola overprinted on the navigation chart.
So that a position line can be plotted on the chart.
By measuring the time difference between arrivals of two pulse signals from two sources give a position line.
The intersection point of these position lines is the ship position.
Required,
At least three fixed transmitting station.
One master station.
Others are Secondary stations.

Difference between ELoran and Loran-c
Main difference is ELoran uses data channel.
E LORAN
ELoran stations are grouped in chains – master station and 2 or more secondary station.
First Master station transmit.
Then successive transmission from secondary station.
Transmission repeated periodically.
ELoran uses atomic clock and data channel.
Receiver unit give latitude longitude.
LORAN-C
Loran-c works on a hyperbolic navigation system.
Hyperbola overprinted on the navigation chart.
So that a position line can be plotted on the chart.
By measuring the time difference between arrivals of two pulse signals from two sources give a position line.
The intersection point of these position lines is the ship position.
Required,
At least three fixed transmitting station.
One master station.
Others are Secondary stations.

Loran-c error
Electronic effect of weather: Loran-c suffer electronic effect of weather
Ionospheric effect of sunrise sunset: Loran-c suffer ionospheric effect of sunrise sunset
Multipath interference: at night sky wave bend down to the surface, resulting multiple signals
Effect of magnetic Storm: Serious effect on any radio based system
Covers only certain region: north America, Europe, pacific region
Unfortunately, ground wave follows earth surface ideally over sea water.