At 05:49 02 August 2015, Darryl Ramm wrote:
On Saturday, August 1, 2015 at 9:51:11 PM UTC-7, Bill T wrote:
The airliner with ADS-B IN will get the traffic data rebroadcast
from
ATC=
and the 1202 traffic will show on his ADSB display.
I did not say that he would be able to discern the code, just
that the
AD=
SB-R would show the traffic.
=20
BillT

You are assuming airliner CDTI equipment will display TIS-B
traffic, and
th=
at CDTI has any capability of showing Mode A codes. Do you know
that for
su=
re? With what exact systems? You can't just assume what would
be nice is
ac=
tually how things work, especially in a highly regulated, complex
and
horre=
ndously expensive transport category avionics, with TCAS/CDTI
systems that
=
have to work all over the world. Again, airliners are equipped with
TCAS
w=
hich really provides them with all the transponder based collision
avoidanc=
e they need, and TCAS CDTI will not show Mode A codes.

The latest versions of TCAS II utilize hybrid surveillance where the
TCAS
s=
ystems receives 1090ES Out from nearby aircraft and uses that to
augment
po=
sition information/avoid excessive transponder
interrogations/provide long
=
range traffic display. TCAS does not use that data directly for
issuing a
T=
A or RA. AFAIK TCAS II hybrid surveillance relies on 1090ES Out
from the
ta=
rget aircraft, it does not utilize UAT, ADS-R or TIS-B for this. If
anybody=
knows different it would be great to know what exact system that
is.


Thank You!