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Bob,
While you might tune in to someone else's reception of traffic in his puck,
it is not going to be accurate for you since you have not broadcast your own
information (ADS-B Out). It is foolish to believe you'll get
accurate traffic without transmitting your own information. The
reason ADS-B is a good thing is very accurate position data (WAAS, altitude
via geodesic model, etc.) is transmitted and updated at least once every 2
seconds (or less). That's better than radar and current transponder
info. Wikipedia is not the most accurate source. See the AIM or any
NEXGEN documentation.
Scott Krueger
In a message dated 7/17/2012 10:16:43 A.M. Central Daylight Time,
r.rickard@rcginc-us.com writes:
Look up ADS-B on Wikipedia. The system works by communicating
directly with other ADS B units for traffic as well as displaying the "system"
traffic and other information. An excerpt:
Safety
ADS-B makes flying significantly safer for
the aviation community. When using this system both pilots and controllers
will see the same radar picture. With past systems such as the Traffic Alert
and Collision Avoidance System (TCAS) aircraft could only see other aircraft
equipped with the same technology. With ADS-B, information is sent to aircraft
using ADS-B In, which displays all aircraft in the area, even those not
equipped with ADS-B technology.
[edit]New
services
- Traffic - When using an ADS-B In system a
pilot is able to pull up traffic information on surrounding aircraft. This
information includes altitude, heading, speed, and distance to aircraft.
- Weather - Aircraft equipped with UAT ADS-B
In technology will be able to receive weather reports, and weather radar
through Flight Information Service-Broadcast (FIS-B).
- Terrain - ADS-B In technology, broadcasts a
terrain overlay for pilots to view in the cockpit.
- Flight information - Not to be confused
with FIS-B, Traffic Information Service-Broadcast (TIS-B) transmits readable
flight information such as TFRs and NOTAMs to aircraft equipped with either
UAT or 1090 Squitter ADS-B systems.
Recommend getting smart on this (and finding out where the current
weather data is available, it's not conus wide yet) before spending a bucket
of cash on a "legacy" system.
Bob R
Scott,
Do I understand correctly that ADS-B traffic information comes via a
ground station somewhere? How does that actually perform when
you are in a valley somewhere?
I used to have TIS-B. I loved it when and where it worked but
there were enough discrepancies + the fact that you had to have line of
sight to the Radar facility that I was really enthusiastic about getting my
ryan 9900BX. The very best thing about TIS-B is that it showed me how
much traffic I wasn't seeing. However, the delay and coverage issues
are real. One incident I had, I was at the range limit of the
Sacramento facility when I saw a blip at less than two miles 10 O'clock.
I looked up and there was a mooney headed straight at me. I
dove to the right and no sooner than he had passed my tail, he disappeared
off the screen. If I had been a mile further south I never would have
seen him. Another incident: as I was going into Palo Alto I had
several targets coming up at me. One was 12 O'clock and reported as
300' below me and climbing. I was about to climb when I spotted it
already above me. That is where the delay was really a problem.
Dico,
IMO in a IVP you will be very happy to have an active system like the
avidyne TAS 600 or 605. The former is only $8490 and you can install
it yourself. The latter list is a little over $10,000. (You can
probably find it cheaper....or you can find someone who is gaga over ADS-B
and make them an offer....) You'll find it works much more reliably,
regardless of geography and doesn't have the delay of going through a
ground station.
The 600 gives you coverage up to 18,500 above which you have radar
separation because you will be IFR.
Colyn
Dico,
For the present and future, consider ADS-B.
Here is an example:
Scott Krueger
Hello All,
Is there a good TCAS system available for our
experimental airplanes. I really like the skywatch systems with the
2 antennas.. however with the prices $10k - $15k, its pretty crazy
high. The Zaon systems are a bit to far on the other end of the
scale and have deadspots. Does anyone know of other good systems --
or if systems for experimental planes are being developed? Or
perhaps were we could get one from a written off Cirrus or something that
had a
system?
Thanks,
Dico
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