|
| If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|||||||
|
|
Thread Tools | Display Modes |
|
#15
September 13th 04, 06:00 PM
|
|||
|
|||
"Gerry Caron" wrote in message ...
It works by using a Mode A interrogator and multiple receivers around the periphery of the airport. By measuring the time difference of arrival (TDOA) of your transponder replies, it calculates your position relative to the airport and the approach path. It then broadcasts thru an omni antenna an "ILS" signal modulating the 90 and 150 Hz tones to drive your CDI to indicate the proper guidance to the approach path. Fascinating the things people thought up back in the days before a constellation of satellites could provide a 3D positional fix with an accuracy measured in inches. With WAAS underway, it seems predictable that non-precision approaches will be joining colored airways in the dustbin of history. If the FAA had the resources and motivation it could probably be accomplished in 5 years, though I suppose 20 is more likely... -cwk. 
|
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| "bush flying" in the suburbs? | [email protected] | Home Built | 85 | December 28th 04 11:04 PM |
| Diamond DA-40 with G-1000 pirep | C J Campbell | Instrument Flight Rules | 117 | July 22nd 04 05:40 PM |
| Fixing the Transponder with Duct Tape and Aluminum Foil | Ron Wanttaja | Home Built | 45 | March 14th 04 12:18 AM |
| Off topic - Landing of a B-17 | Ghost | Home Built | 2 | October 28th 03 04:35 PM |
| 2nd update on Review of Plasma II Ignition System | MikeremlaP | Home Built | 8 | July 22nd 03 01:37 AM |
Threaded Mode