Posted for Sky2high@aol.com:
Colyn and
Dico,
Valley performance is great if the other aircraft is properly equipped.
You did not have TIS-B,
just TIS. TIS is only available in limited areas
(like within 50 NM of KORD). See slide 11 of the
attachment. I have a
Garmin 430W and GTX 330 so I can get TIS if available. TIS is easily
confused
by closely crossing airplanes or your own steep turns. ADS-B knows when
your velocity vector is changing
because of the high xmit/receive rate.
Hey, I am gaga over ADS-B, it is here today and IS your future in
a mere
7.5 years. Some Display and UAT systems come in around $5500. Check it out.
[Please go
to https://www.dropbox.com/s/9257rfxsd5huxue/Colyn1%20reduced.pdf for the file attached to this message. <marv> ]
Read the TCAS-II
limitations at the end of the attachment. Don't dive
unless you have TAWS.
The following is an
outline of a presentation I recently made to an EAA
group. Attached are the PDF slides. I have a demo
program on my laptop of
the SkyVisionXtreme that I use with the presentation. If you want to see a
demo, look for a dealer in your area. Uh, I would exude my gaga-ness in
front of a group
for expenses. Maybe....
Scott Krueger
==========================================Supporting text
for
PDF.================
SLIDE 1
ADS-B
The NexGen system relies on GPS-WAAS,
ADS-B and the participation of GA
for flight safety and efficiency. ADS-B services include weather (FIS-B)
transmitted from ground stations and traffic (TIS-B) available directly from
other ADS-B equipped aircraft or from the
same ground stations that have
also acquired aircraft location information by any means. There are other
services, but these are the most important to non-commercial GA. When
complete in 2013, there will be about
800 such ground stations with 393
operating
today (there were only 331 at the end of
February 2012).
SLIDE 2
ADS-B in 2020
In the continental USA and by 2020,
aircraft must be broadcasting ADS-B
OUT data (altitude, location, direction, speed, ID, etc.) in class A, in or
above
class B and C airspace and within a 30 NM radius of B and C airports
or in class E at an altitude above 10,000 MSL,
but not at an AGL of 2500 or
less (in class E). In other words, if you fly out in the weeds and never
go
anywhere important, you need not deal with this.
SLIDE 3
There are special non-compliance
allowances for aircraft with no
electrical system, balloons and gliders. So it’s still heads up out there.
Perhaps the FAA will require UAVs to send ADS-B OUT data.
OUT information may
be broadcast on the UAT (Universal Access Transceiver)
frequency of 978 MHz or on the current transponder frequency of
1090 MH,
commonly known as Extended Squitter (ES). But wait, there’s a special
mandatory rule for
flights at or above 18,000 MSL – ADS-B OUT must be
transmitted on 1090 MHz ES even if it is also transmitted on 978
MHz. OUT
data,
whether via transponder ES or UAT must be conditioned by GPS WAAS position
information
for accuracy.
If you fly at or above FL180 and are thinking about replacing your
transponder in the near
future, consider one that transmits ES or is easily
converted to such transmission at a later date.
The UAT
operates on a different frequency because there are bandwidth,
framing, rate and interrogation limitations on the
overworked transponder
frequency.
But, not to worry as these specific requirements are merely 7 years in
the
future.
SLIDE 4
Data gathering and distribution diagram.
ADS-B NOW
SLIDE 5 Radios
As of 6-20-12, 393 of the 800 radios.
SLIDE 6 Terminals
Increased traffic detail and weather on t;he ground in terminal
environments.
SLIDE 7 ENROUTE
ATC support. Currently within boundaries. Radio coverage is greater than
these boundatries.
FIS-B weather –
SLIDE 8
Includes NEXRAD, METARs, TAFs, AIRMETs, PIREPs, NOTAMs, TFRs, etc. See AIM
7-1-11
TRAFFIC
SLIDE 9 – This is why ADS-B out is needed.
T1 –T4 SLIDES 10, 11, 12, 13
pix taken with my iPhone.
10 – Note the Monroy display indicates an aircraft at 2 miles. Not seen on
the 430
at 50 mile range.
11- TIS traffic page shows it up. Direction vector accurate within 45
degrees. Trend shows descent.
12 – Can’t se nothing at 2 miles, so I had to chase the bogie……..
13
– See that dot I the middle of the screen at about 1 mile…..
The FAA would like every GA airplane equipped with ADS-B
now and they are
bending over backwards to promote its acceptance and hold down the costs to
the owner/operator while
making the safety benefits worthwhile. In light
of that, UATs need not be TSO’d at the moment where those that are
transmitting are approved by the FCC and the manufacturer will be required
to bring
any in the field up to the TSO
standards when finalized. UATs can be a “
portable” install (velcroed) in a certified aircraft with only a
minor
modification approval for the installation of power along with GPS and
transponder-like
antennas. The FAA has no specification for display devices
and the
use of Bluetooth or WiFi to
a portable device (such as an iPad) is OK.
Remember, the FAA in on target to have all 800 stations
operating by 2013.
WHAT CAN YOU DO NOW?
Example SLIDE 14
SKYVISIONXTREME.com PROGRAM
Demo a LA CA recorded flight with traffic and weather.
Why weather only doesn’t make it Unexpected
consequence is cockpit weather
routes traffic around storms and into dense corridors.
End of
presentation. Additional info
15. ADS-B Out data transmitted
16. Transponder
requirement unchanged, altitude correspondence.
17. Altitude correspondence.
18.
Code correspondence.
19. Additional TCAS cost to interface.
20. Antenna
21 and 22. TCAS
II limitations.
===============================================
In a message dated 7/16/2012
11:35:09 A.M. Central Daylight Time,
colyncase@earthlink.net writes:
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.
_http://www.avidyne.com/products/tas600/index.asp_
(http://www.avidyne.com/products/tas600/index.asp)
_http://www.avidyne.com/downloads/brochures/AV645_Retail_PL.pdf_
(http://www.avidyne.com/downloads/brochures/AV645_Retail_PL.pdf)
Colyn
On Jul 16, 2012, at 10:09 AM,
_Sky2high@aol.com_ (mailto:Sky2high@aol.com)
wrote:
Dico,
For the present and future,
consider ADS-B.
Here is an example:
_http://skyvisionxtreme.com/_ (http://skyvisionxtreme.com/)
Scott Krueger
In a message dated 7/16/2012 7:13:32 A.M. Central Daylight Time,
_dico@internetworks.ca_ (mailto:dico@internetworks.ca) writes:
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
=
|