DX-World

0 Responses to “PY0FF assists in search for flight AF-447”

1. Samuel Gon?§alves says:

   June 4, 2009 at 22:19

   Com grande alegria, parabenizo ao Andr?Š Sampaio, pela disposi?§??o em estar colaborando numa missao de suma importancia no esfor?§o incomum de alguma forma somar esfor?§os aos da marinha e aeron??utica Brasileira em localizar o Air Bus da AF447.
   Quanto ao mais sem coment??rio !!!
   Parab?Šns.
2. RICARDO PU2OKE says:

   June 5, 2009 at 20:59

   Estamos muito orgulhos do colega Andre PY0FF, sobre o empenho na miss??o em localizar o airbus desaparecido, junto com Aeron??utica e a Marinha Brasileira.
   S??o de esfor?§os desse feito que realmente valoriza os de Radioamadores Brasileiros.
   Parab?Šns mais uma vez…
   73 e at?Š qualquer momento.

   RICARDO
   PU2OKE
   GG66vl

   ——–
   Translated:

   We are very proud of Mr Andre PY0FF on the commitment to the mission to find the missing Airbus, along with Brazilian Air Force and Navy.
   Efforts that are done that really values the radio amateurs of Brazilians.
   Congratulations once again …
   73 and up any time.
3. Christy Sweet says:

   June 8, 2009 at 07:03

   Help needed from radio operators who may have intercepted more ACARS messages and/ or communiques from Flight AF 447 :

   http://www.pprune.org/rumours-news/376433-af447-25.html

   Post # 497

   ACARS txm:s is via VHF ground network or switched to L-band via Satcom. Therefore it is normal that amatuers don´t pick up any of the txm:s on L-band. If the downed 330 had an array-mounted antenna for L-band txm:s and was doing a violent out of control flight, mother in Paris (receiving dish) should have a threshold point on rx, and as the flight may have been doing a lot of txm:s, it would be possible that more txm:s was aired but not recived by “mother” due to the gain-step setting (eB/no) in the receiver in Paris if the array-antenna was out of it´s prime focus during the last minutes.

   As there are a minor group of dx:ers active on the L-band (microwave band), it could have been possible that additional data could have been recieved and stored on a hard drive at a l-band fan amatuer, as amatuers always are on the edge of possible receiving limits-settings. The only issue is if ACARS is encryped and how hard encrypted any ACARS-txm:s would be to decode.

   Is there a back-up recordings at Satcom NOC downlink-station, or is Paris the only active downlinker for AF ACARS txm:s. It could maybe be a good idea to spread the world to the L-band people and ask if someone was recording Satcom ACARS on june 1st on 1700 band, especially if worst scenario occurs were´s the “blaxboxes” never gets retrived or are in a degraded condition.

   Just a thought in this tragic situation.

   Sincerely
   Thomas in Stockholm / engineer.

   Edit-1: Not sure if this link is the right antenna-config, but phase-arrays can be tilted a lot and mantaine communication, suspect more that the CB:s would damp the signal to a critical threshold depending on downlink size of dish and eb/no-setting.
   Link is: http://www.emssatcom.com/pdf/AMT-3500.pdf

   Edit-2: Also in mind, these array-antennas has a specific radiaton pattern, and when accessing satellites, usually the NOC keeps an record on time-signalstrength etc for tech-monitoring and billing purposes. So with the NOC data and the previous post of the ASCARS messages, it could may be possible to determind the angle of the A/C if a calculation was made of NOC telemetri-data compared with the time-stamp of ACARS txm:s, as we know the pattern and how is mounted on the A/C body.