On Jun 3, 6:19=A0pm, "RST Engineering" <j...@[EMAIL PROTECTED]
> wrote:
> Bob ...
>
> I think you are a little bit off the mark. =A0TCAS sends, in one form or
> another, my lat/long/altitude out either as a radar blip to an
interrogati=
on
> or from GPS coordinates. =A0If you know your own l/l/a and you get
another=
> l/l/a and the l/l/a of the interrogator, just a wee bit of geometry and
> software can give you target info accurate to a degree and a few feet of
> altitudinous.
>
> Jim
>
> --
> "It is the mark of an educated mind to be able to entertain a thought
> without accepting it."
> =A0 =A0 =A0 =A0 --Aristotle
>
> "Bob Noel" <ihatessppa...@[EMAIL PROTECTED]
> wrote in message
>
> news:ihatessppaamm-D55A93.19444303062008@[EMAIL PROTECTED]
>
>
>
> > In article <1hdz3cp9zslvq.bd6inf8tkh7s....@[EMAIL PROTECTED]
>,
> > Dallas <Cybnorm@[EMAIL PROTECTED]
> wrote:
> > Well, it is a radar system. =A0It determines RAnge and Direction the
sam=
e
> > way
> > the ATC Beacon Radars do. =A0The TCAS II system sends out an
interrogati=
on,
> > times the response from the cooperating targets to get range. =A0Crude
> > direction
> > information is determined by the 4-pole antennea. =A0This azimuth
> > information
> > isn't =A0particularly accurate (on the order of +/- 15 degrees)- Hide
qu=
oted text -
>
> - Show quoted text -
Bzzzzt.... nice try Jim, but thanks for playing! TCAS works exactly
as Bob describes it. I worked at Boeing when TCAS was first
implemented, and one of the LCD display projects I was working on was
used as a retrofit TCAS/VSI.
Dean
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