Hi, >Ah... this Terrain-aided navigation (TAN) is just >another method of positioning, just like GPS or standard >NAVs (like VOR, NDB etc.).
Yep, I got it, what I was aiming at when saying that it's an expansion is that we are dealing with the applications of TAN. We started by assuming that we have TAN as well as other sensors,and try to show the applications of TAN. Assuming that it's a solvable problem which needs applications to be fully developed, once the need is established we can let our developers the job of actually implementing it. I have seen before two serious attempt in TAN both in the US Air Force. Their CH53Es had a navigation system which utilized TAN for higher accuracy and their C130 had a similar integrated system. Both did not use pure TAN, TAN was only used as complimentary system for other navigation sensors like RADAR and GPS. Actually their CH53Es reached flight capabilities of terrain following flight at 100' AGL in IFR conditions. You have to be a little crazy to attempt it but .... maybe thats why they are the kings of the world ;-) . If you don't mind, when you finish your work I would love to know the results. Anyways try NIMA they have level 0 data for the entire world. Theres more DTED Level 0 data at: http://data.geocomm.com/catalog/IS/group121.html Have fun Erez __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - forms, calculators, tips, more http://taxes.yahoo.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
