CNN article on problems in Air Travel, as seen by FAA

wrote:
Mxsmanic wrote:
writes:

Such as?

Such as the need for local transmitters at every airport. LAAS requires this,
and since WAAS cannot match ILS precision, LAAS is required if ILS is to be
fully replaced.

What about multipath?



LAAS uses one frequency to upload the corrections necessary
for CAT 2 and 3. IAW, one VHF uplink.

Jam it or lose it and you lost all your CAT 2 or 3

Single Thread is not good

WhoGivesAFig? wrote:
wrote:
Mxsmanic wrote:
writes:

Such as?

Such as the need for local transmitters at every airport. LAAS
requires this,
and since WAAS cannot match ILS precision, LAAS is required if ILS is
to be
fully replaced.

What about multipath?



LAAS uses one frequency to upload the corrections necessary for CAT 2
and 3. IAW, one VHF uplink.

Jam it or lose it and you lost all your CAT 2 or 3

Single Thread is not good


Look at this link

Notice the VHF uplink

JUST ONE

Not good

http://en.wikipedia.org/wiki/Local_A...ntation_System

Maybe a LAAS and a JPALS as a backup may be a good
redundancy plan??

I say it must be done that way if you remove the ILS systems

WhoGivesAFig? wrote:
wrote:
Mxsmanic wrote:
writes:

Such as?

Such as the need for local transmitters at every airport. LAAS requires this,
and since WAAS cannot match ILS precision, LAAS is required if ILS is to be
fully replaced.

What about multipath?



LAAS uses one frequency to upload the corrections necessary
for CAT 2 and 3. IAW, one VHF uplink.

Jam it or lose it and you lost all your CAT 2 or 3

Single Thread is not good

So, if you don't have LAAS and the ILS goes tits up, what's the backup?


--
Jim Pennino

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wrote:
WhoGivesAFig? wrote:
wrote:
Mxsmanic wrote:
writes:
Such as?
Such as the need for local transmitters at every airport. LAAS requires this,
and since WAAS cannot match ILS precision, LAAS is required if ILS is to be
fully replaced.
What about multipath?



LAAS uses one frequency to upload the corrections necessary
for CAT 2 and 3. IAW, one VHF uplink.

Jam it or lose it and you lost all your CAT 2 or 3

Single Thread is not good

So, if you don't have LAAS and the ILS goes tits up, what's the backup?



My vote would be JPALS. The LAAS version of TACAN

writes:

GPS was designed to be a locating system, period.

It's a system that allows users to locate themselves. It doesn't provide any
information to third parties.

Martin writes:

How interesting. Transponders transmit the planes location obtained from a GPS
receiver.

Transponders are not part of GPS. I can write my location on a notepad, but
that doesn't make my notepad part of GPS, either.

writes:

What about multipath?

What about it? It's a problem in every case.

In rec.aviation.piloting Mxsmanic wrote:
writes:

GPS was designed to be a locating system, period.

It's a system that allows users to locate themselves. It doesn't provide any
information to third parties.

No ****?

How about classical music, weather, satellite photos, talk radio,
wireless internet, baseball scores?

As I said, GPS was designed to be a locating system, as in where the
**** am I, period.


--
Jim Pennino

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WhoGivesAFig? wrote:
wrote:
WhoGivesAFig? wrote:
wrote:
Mxsmanic wrote:
writes:
Such as?
Such as the need for local transmitters at every airport. LAAS requires this,
and since WAAS cannot match ILS precision, LAAS is required if ILS is to be
fully replaced.
What about multipath?



LAAS uses one frequency to upload the corrections necessary
for CAT 2 and 3. IAW, one VHF uplink.

Jam it or lose it and you lost all your CAT 2 or 3

Single Thread is not good

So, if you don't have LAAS and the ILS goes tits up, what's the backup?



My vote would be JPALS. The LAAS version of TACAN

And if you don't have that?

--
Jim Pennino

Remove .spam.sux to reply.

Mxsmanic wrote:
writes:

What about multipath?

What about it? It's a problem in every case.

Really?

Multipath is only a problem in analog systems where the information
is in phase differences, like an ILS system.

There is also the issue that ILS is AM and thus can't rely on
discriminator capture.

But I'm sure you know all about EM propagation theory, information
theory, and modulation theory.


--
Jim Pennino

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