X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 16 Sep 2009 21:54:51 -0400 Message-ID: X-Original-Return-Path: Received: from web33905.mail.mud.yahoo.com ([209.191.69.183] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with SMTP id 3856457 for lml@lancaironline.net; Wed, 16 Sep 2009 18:39:09 -0400 Received-SPF: none receiver=logan.com; client-ip=209.191.69.183; envelope-from=wfhannahan@yahoo.com Received: (qmail 87259 invoked by uid 60001); 16 Sep 2009 22:38:35 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=1OTdg2bq8z78ZtQU/4qXpA9i4Atavw8VE8W2/DpF72/0P91MZdK3DODIhzT3atc49WPw/LX10ybciziB4EksWIgkApT2nbEPeDo3FbFSjsuIfS0B7HhGXgMAqHEfWiQg2KK6G/fCXWiKoXgtvEsy8DLsK+qegXyf2wTEyMrlIdg=; X-Original-Message-ID: <53825.86446.qm@web33905.mail.mud.yahoo.com> X-YMail-OSG: b7oVFsYVM1lCycMXStCBXCaPeN1Z.jhWzO7XfNRmrrq9hhMOqh8ADkuRU3tOE3UwP3G01vhFmhOZWl..pL0q.Ieo.NBCHmbTB6bOljV5c2Cv8T3cc.09NYBleQ8bxwwV_f3oonTi4Tt5sDGF9tDA_t9vTVcGS3JyPsl7k2MFFHIbFPn8O57Tm7QP4mQKQCWq..1EGdX33odSDjk_HtS4A_1iA1K7bb9MDtD_i.H9N796gqS7YRF.zFdUXylFXewOE..EOW8JaKFpmQ_A23c0QwD6oRH7L_58_yEFjNEatMsfmexBQNKVO_R1PSjzjv0GewJuZj9VxXJgD0ka.jNwMMgogIQSLHDzKLlZkN.QiGo0jy.l Received: from [71.208.33.10] by web33905.mail.mud.yahoo.com via HTTP; Wed, 16 Sep 2009 15:38:34 PDT X-Mailer: YahooMailClassic/7.0.14 YahooMailWebService/0.7.347.2 X-Original-Date: Wed, 16 Sep 2009 15:38:34 -0700 (PDT) From: Bill Hannahan Subject: Hudson airspace X-Original-To: MAIL LANCAIR MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1114590109-1253140714=:86446" --0-1114590109-1253140714=:86446 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable =0A=0A=0A=0AAOPA asked me to contact my rep about the Hudson=0Acorridor. I = did, but I don=E2=80=99t think it addresses the root cause of the problem.= =0AMy two cents below.=0A=0A=C2=A0=0A=0AI am writing in support of the reco= mmended changes to the=0Aairspace over New York City. It is=0Aa temporary s= olution.=0A=0A=C2=A0=0A=0AThe real reason for most mid-air collisions is th= e FAA=E2=80=99s=0Afailure to develop an effective reliable cost effective c= ollision avoidance=0Asystem (CAS).=0A=0A=C2=A0=0A=0AYou will not read this = in any accident report. The fox is=0Ainvestigating the case of the missing = chickens.=0A=0A=C2=A0=0A=0AIn reality designing and implementing a good CAS= would be=0Aorders of magnitude simpler than designing and implementing a c= ell phone=0Anetwork that can connect people all over the world in real time= . Consider a=0Amodern cell phone. It contains a microprocessor, memory, bat= tery, transmitter,=0Areceiver, GPS chip, microphone, and visual display.=0A= =0A=C2=A0=0A=0AThe only remaining requirement is the application specific= =0Asoftware. The device would transmit the aircraft=E2=80=99s position and = velocity=0Avectors, six pieces of data, in a short semi random burst. Nearb= y aircraft=0Awould receive this data with a separate receiver and display i= t.=0A=0A=C2=A0=0A=0AWould the Hudson=0Amid-air have occurred if both pilots= had the same information on their=0Ainstrument panel that the controllers = had on their screen, (actually much more=0Aaccurate and up to date informat= ion)? Would the collision have happened if both=0Apilots had audible and vi= sual warnings with a countdown timer ticking off the=0Aseconds remaining to= collision?=0A=0A=C2=A0=0A=0AOn the display, each aircraft symbol would coa= st along its=0Avelocity vector between transmissions, and the transmission = rate would vary as=0Aneeded to insure accuracy even with an occasional over= lap of transmissions.=0AThat is, when an aircraft is flying straight at a c= onstant speed, the=0Atransmissions would be several seconds apart without a= ffecting accuracy. When=0Athe plane is changing direction or speed the time= between transmissions would=0Abe less.=0A=0A=C2=A0=0A=0ABy using cell phon= e technology the equipment would be so small=0Aand inexpensive that sky div= ers, ultra light aircraft, sailplanes, airport=0Avehicles and unmanned airc= raft could be equipped. A single conveniently mounted=0Atransmitter could b= e programmed to transmit the coordinates of several points=0Aon tall towers= , buildings, tethered balloons, bridges and cables, thus=0Aprotecting aircr= aft operating in poor visibility.=0A=0A=C2=A0=0A=0AWith a separate transmit= ter and receiver on each aircraft,=0Apeople would be protected in the event= of a single failure. If your transmitter=0Afails you will still be able to= electronically see and avoid the other aircraft=0Aaround you; if your rece= iver fails they will still see and avoid you.=0A=0A=C2=A0=0A=0AFor many yea= rs the FAA has been working on a very expensive=0ARube Goldberg system call= ed ADSB to perform a few of these functions. It will=0Abe mandatory in 2020= . The advantages of low cost, light weight, reliability,=0Aadded features e= ase of mass production and capability of rapid development and=0Adeployment= makes this approach far superior.=0A=0A=C2=A0=0A=0ARegards, Bill Hannahan= =20 wfhannahan@yahoo.com=0A=0A=0A --0-1114590109-1253140714=:86446 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
=0A =0A Normal=0A <= w:Zoom>0=0A =0A =0A <= w:SnapToGridInCell/>=0A =0A =0A =0A MicrosoftInternetExplorer4=0A =0A=0A=0A=0A

AOPA asked me to contact my rep about the = Hudson=0Acorridor. I did, but I= don=E2=80=99t think it addresses the root cause of the problem.=0AMy two c= ents below.

=0A=0A

 

=0A=0A

I am writing in support of the recommended changes to th= e=0Aairspace over New York City= . It is=0Aa temporary solution.

=0A=0A

 =

=0A=0A

The real reason for most mid-air col= lisions is the FAA=E2=80=99s=0Afailure to develop an effective reliable cos= t effective collision avoidance=0Asystem (CAS).

=0A=0A

 

=0A=0A

You will not read th= is in any accident report. The fox is=0Ainvestigating the case of the missi= ng chickens.

=0A=0A

 

=0A=0A

In reality designing and implementing a good CAS would = be=0Aorders of magnitude simpler than designing and implementing a cell pho= ne=0Anetwork that can connect people all over the world in real time. Consi= der a=0Amodern cell phone. It contains a microprocessor, memory, battery, t= ransmitter,=0Areceiver, GPS chip, microphone, and visual display.

=0A=0A=

 

=0A=0A

Th= e only remaining requirement is the application specific=0Asoftware. The de= vice would transmit the aircraft=E2=80=99s position and velocity=0Avectors,= six pieces of data, in a short semi random burst. Nearby aircraft=0Awould = receive this data with a separate receiver and display it.

=0A=0A

 

=0A=0A

Would the= Hudson=0Amid-air have occurred= if both pilots had the same information on their=0Ainstrument panel that t= he controllers had on their screen, (actually much more=0Aaccurate and up t= o date information)? Would the collision have happened if both=0Apilots had= audible and visual warnings with a countdown timer ticking off the=0Asecon= ds remaining to collision?

=0A=0A

 

=0A=0A

On the display, each aircraft symbol woul= d coast along its=0Avelocity vector between transmissions, and the transmis= sion rate would vary as=0Aneeded to insure accuracy even with an occasional= overlap of transmissions.=0AThat is, when an aircraft is flying straight a= t a constant speed, the=0Atransmissions would be several seconds apart with= out affecting accuracy. When=0Athe plane is changing direction or speed the= time between transmissions would=0Abe less.

=0A=0A

 

=0A=0A

By using cell phone tec= hnology the equipment would be so small=0Aand inexpensive that sky divers, = ultra light aircraft, sailplanes, airport=0Avehicles and unmanned aircraft = could be equipped. A single conveniently mounted=0Atransmitter could be pro= grammed to transmit the coordinates of several points=0Aon tall towers, bui= ldings, tethered balloons, bridges and cables, thus=0Aprotecting aircraft o= perating in poor visibility.

=0A=0A

 

=0A=0A

With a separate transmitter and receive= r on each aircraft,=0Apeople would be protected in the event of a single fa= ilure. If your transmitter=0Afails you will still be able to electronically= see and avoid the other aircraft=0Aaround you; if your receiver fails they= will still see and avoid you.

=0A=0A

 <= /o:p>

=0A=0A

For many years the FAA has been worki= ng on a very expensive=0ARube Goldberg system called ADSB to perform a few = of these functions. It will=0Abe mandatory in 2020. The advantages of low c= ost, light weight, reliability,=0Aadded features ease of mass production an= d capability of rapid development and=0Adeployment makes this approach far = superior.

=0A=0A

 

=0A=0A
R= egards,
Bill Hannahan

=0A=0A=0A=0A --0-1114590109-1253140714=:86446--