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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Lat/Long Calculations in Loran
From: Lu Abel
Date: 2001 Jul 22, 9:01 AM
From: Lu Abel
Date: 2001 Jul 22, 9:01 AM
Does anyone have specific knowledge of how Loran receivers calculate L/Lo? It seems to me there are two possibilities: 1. Pseudo-ranging as is done in GPS receivers. This involves guessing at a position (L, Lo, and time) and seeing if it's consistent with the received signals. If not, the position is adjusted and rechecked. This is repeated until the AP is consistent with all received signals and therefore can be called a fix. 2. Starting with the TDs as received and grinding them through some set of equations which produce L/Lo directly from the TDs. I'd appreciate knowing how folks like Micrologic and Furuno actually did it. Thanks. Lu
