On 09/11/2010 08:24 PM, Ralph Smith wrote:
On Sep 11, 2010, at 12:13 PM, Magnus Danielson wrote:
On 09/11/2010 05:29 PM, jimlux wrote:
If it's far enough in the future.. Hg ion traps have a lot of
potential.. smaller, lower power, etc. than Cs
Commercial availability is somewhat limited.
that's for sure.. I think all the Hg ion traps are still laboratory
curiosities.. but, 10 years from now?
Sure, but that assumes his target deployment is 10 years ahead.
Much closer than 10 years. The idea is to use existing or soon to be deployed
infrastructure from the US ADS-B installation to also perform multilateration.
I assumed within 1 or 2 years. This rules out waiting for
commercialisation of new standards or new approaches on ADS-B receivers
unless you control that process yourself.
Yes, yes... I understood perfectly what you where describing and no doubt such
a hint would be most useful, but it may not be applicable to his problem. The
question is really if he has complete boxes to build with or can alter their
design. Additional delta-channels is best handled in a combined receiver, as
being done in many other similar heading receivers... such as GPS receivers
with angular orientation such as used in airplanes and on ships.
Multilateration can be performed with existing radios being deployed, deriving
time synchronization from GPS. Future revision of radio specifications are
possible, but are more likely to be incremental changes of existing design
rather than more significant architectural changes.
As expected. The concept for ADS-B multilateration is already set down,
so the available parameters is really providing a timing system,
algorithms of multilaterations and possibly aiding to sort things out.
Cheers,
Magnus
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