joseph Murray wrote:
Hi Bob
You said"
What will happen if the Galileo goes up is that no European airport will allow a commercial jetliner to land without the Galileo system. This will inevitably lead to this basic system being in world wide use for navigational purposes
Does this imply that all airliners going to and from EU and US will have to have both Global positioning system ? ( Galileo and the US GPS) It would appear that the country to which an aircraft is approaching could demand a specific space navigetion syetem to be used.
As I understand the current Galileo event : It is in test phase. No actual system funding has been established. No list of users have been verified to be real supporters. The use of the US GPS system does not cost the EU anything. All EU users of the current US GPS system will need both if there is no global support for a single system Without a Amateur satellite using a mode L up link that uses narrow analog and/or wide band digital modulation ( which could change over time ) the Galileo testing is not really testing for amateur interference.
We COMPLETELY agree that this is essentially the state of affairs. That said, we can only ASSUME the Europeans mean to do exactly what they say they will do in building the Galileo system. Given that this is the only safe assumption we can make, we do not wish to spend millions of dollars on a satellite system designed to be in operation well into the currently proposed early days of Galileo where our principal payloads demand the use of L band.
Anyway, the arguments about this are all based on NONEXISTENT CONDITIONS. We cannot use L band for the ACP (CC-Rider) in my opinion. I see no reason at this time why we cannot fly an L band receiver for the linear transponders. I have already asked John Stephensen to design one and he has AGREED to do it. Why are we arguing over a non issue? I believe L band can be accomodated on Eagle but before I write it in blood, I want Jim's team to do an analysis that shows we can fit it along with our primary payload antennas on the space frame.
Thanks
Joe K0VTY
73's Bob N4HY