CONVERTING TIME DIFFERENCES TO LAT-LONG
Guard Research and Development Center has developed "Coast
Guard POSAID2 ver 2.1a", a DOS-based program for converting
LORAN-C time differences (TDs) to latitude and longitude.
You may download the files here
in zipped format. After you download the files, you must
extract them using an "unzipping" application .
There are many zipping / unzipping application available by
searching the Internet. We do not endorse or recommend any
available commericial products.
The conversion is based on the Sodano (1965) method taken
from McCullough, J, et al, "LORAN-C Latitude-Longitude
Conversion At Sea Programming Considerations". The original
reference for the conversion is: Sodano, E.M., 1965, General
non-iterative solution of the inverse and direct geodetic
problems: Bulletin Geodesique, annee, Nouvelle Serie, no.
The files contained in the zipped
- Chain Information
- Frequently Asked Questions
- Executable DOS File
Contact us if you
have any questions regarding this tool.