[ACARS] ACARS Receiving

[acars@mailman.qth.net]

Hello Carlos,

You looking for this ???
http://www.iprimus.ca/~hepburnw/tropo_eur.html

Greetings from Holland
Peter
http://home.kabelfoon.nl/~pdw/alp/

Carlos Abreu wrote:

> Hi List
>
> Could anyone help me with the following problem (?):
>
> Since a 1999 I monitorize ACARS 24H per day, I live less than 10 miles from
> Lisbon International Airport (Portela LPPT/LIS), normaly I pick up around
> 2000 messages (and sometimes 3000 & more) using a Notebook Toshiba Satellite
> 4070 CDT connected to a Radio Shack PRO-29 scanner, a Watson WRP-125
> amplifier, a AOR ABF 125 filter for airband and a Radio Shack internal
> antenna with 9 extended sections.
>
> However during some days with excepcional summer weather like today with
> clean sky, a very high temperature and no humidity my receiving messages
> decrease for only an hundred or a little more than that...
> All uplinks are missing (?) I jus pick up some downlinks (?).
>
> It is a rare situation but isn't the first time it happens, I lived in a 5th
> floor that in a high place that is good for reception signal, from my large
> window I can see all final approach to runaway 03 from LPPT, as a ex-SITA
> staff I called my friends from OPR dept and they confirmed to me that no
> maintenance was made in Aircom antenna in the airport and the system was
> working fine, I checked the equipment and it's everything ok, no wires were
> moved, the apartment is climatizated what means no problems with equipment
> performance, there�s any physical external interference...I can't undersatnd
> this !!!
>
> Can any list member give an opinion about this or shared any knowledge about
> this strange phenomenon.
>
> Many thanks in advance and best regards.
> Carlos
>
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