I suppose I am naive but when Javad claimed that they had developed a filter to solve the interference from LightSquared, I presumed that they "just came up with a solution".
Then I read "It was only after LightSquared retained GPS receiver expert Javad Ashjaee this year that realism entered the picture..."
It never occurred to me that the motive or apparent change of heart towards LightSquared...
http://www.javad.com/jgnss/javad/news/pr20110523.html
... was the result of their being "retained".
I don't have a problem with companies working together and profiting from their ideas or products. But until the testing is complete, something just seems... doesn't feel... looks... appears... not quite right.
I may be naive, but I am a realist. If their solution works, great! But... Is the testing being done with an eye toward reality? Are GPS receivers surrounded by 3 or more LightSquared transmitters? Are LightSquared cell phones being used around the receivers?
Will the report paint a theoretically positive picture of the lack of interference from LightSquared's plan and Javad's filter? What if in the real world after the plan is approved the filters prove to not work? Problems will be attributed to the fault of GPS. Someone could make multiple millions of dollars for a "working" filter that does not work and alas GPS will be lost indefinitely.
"So sorry, my bad. Oh well, the weather in Cancun is lovely this time of year."
I think Javad or any other good microwave RF designer can do it, providing that LS drops the plan for the upper 10 MHz of the spectrum in question. The remaining problem is the cost to retrofit or replace every existing GPS device.
Why not keep the fix back in the political realm where it belongs?
Just keep Space-based frequencys for Space-based use?
> Why not keep the fix back in the political realm where it belongs?
> Just keep Space-based frequencys for Space-based use?
:good:
Agreed. And subsidize retrofitting, if it is necessary.