Recent Posts

1

AirNav RadarBox and RadarBox24.com Discussion / Re: max range 299nm

« Last post by djchiro on Today at 02:22:34 AM »

OK but it still doesn't make sense. Then what receivers are able to report great than 299nm because I see some with the PGANRB prefix reporting above 299nm. Seems strange that some would be capped and others not. My receiver regularly tracks planes at greater than 299nm as I am located 325ft ASL and have clear LOS NE-E-SE which is all below me and out in the ocean. Yet it never reports that data in the RB24 leaderboard.

2

AirNav RadarBox and RadarBox24.com Discussion / Re: New Station in test EXTRPI617611

« Last post by [email protected] on May 30, 2024, 11:33:47 PM »

To answer my earlier question on keeping a local copy of the data during testing.

apt install netcat-openbsd

Then to dump the SBS messages via

 nc 127.0.0.01 30003

dump1090 code is on github, and it looks to be serving the data to anyone connecting this port. It also dumps a different format to 30002 to any process that connects

3

AirNav RadarBox and RadarBox24.com Discussion / Re: Database Update Requests

« Last post by CarlosAbreu on May 30, 2024, 11:31:31 PM »

Alan

30-05-2024 Updated file in attach.

Carlos

4

AirNav RadarBox and RadarBox24.com Discussion / Re: max range 299nm

« Last post by Runway 31 on May 30, 2024, 06:05:50 PM »

The way I read the post is that all feeds apart from Radarbox suplied receivers are limited to a maximum of 299 miles to protect against bad results being received

Alan

5

AirNav RadarBox and RadarBox24.com Discussion / Re: Database Update Requests

« Last post by Runway 31 on May 30, 2024, 06:02:48 PM »

Many thanks Michel

Alan

6

AirNav RadarBox and RadarBox24.com Discussion / Re: max range 299nm

« Last post by [email protected] on May 30, 2024, 05:32:07 PM »

It will depend on atmospheric conditions.  1.09GHz is mostly line of site, but there is atmospheric refraction and sometimes ducting that will usually extend the range.

There are area specific refraction tables for planning microwave links. The tables have a K factor, which the Earth's radius is increased by to get the expected range (a bigger Earth would have a more distant horizon).  Usually the range is extended, but sometimes the refraction will reduce the range, by refracting away from the earth. This is season, weather and area dependent. It can be a real problem for stable long distance microwave links.

The refraction occurs at the boundary between different layers of air.  Ducting is refraction within a layer, and is leaky in nature.   Ducting is common just above the ocean, where there is a layer where the air is more humid.  It has been used in tests of over the horizon microwave links, and in over the horizon radar. For radar, it is one of the reasons why ships mount their radar as high as possible. The radar needs to be above the ducting layer.

7

AirNav RadarBox and RadarBox24.com Discussion / Re: Database Update Requests

« Last post by Runway 31 on May 30, 2024, 04:55:51 PM »

Thanks Carlos

Alan

8

AirNav RadarBox and RadarBox24.com Discussion / Re: Database Update Requests

« Last post by Michel on May 30, 2024, 04:41:21 PM »

Alan,

AFR37EL LFPG-EKCH
AFR56NR LFPG-EFHK
BAW6AZ EGLL-LCLK
BAW938 EGLL-EDDL
BEL9WA EKCH-EBBR
BTI38C EHAM-EYPA
BTI7QF EYPA-EHAM
CND341 EHAM-LTFE
CND367 EHAM-LTAI
EJU46XQ LEPA-EHAM
EJU87NA EGCC-LIMC
EXS1HL LGTS-EGPH
EXS15CF LGTS-EGNT
EXS26TX LGZA-EGNT
EXS2JZ LGKR-EGPF
EXS2WA LGKF-EGPF
EXS67K EGNT-LCLK
EXS6YR LDSP-EGNM
EXS80W LGSK-EGNM
EZY92LQ EGCC-LGRP
IBE32HH EDDH-LEMD
KLM26F LFLL-EHAM
KLM39K EHAM-LIML
KLM40D LHBP-EHAM
KLM49F EHAM-EDDH
KLM73J EHAM-LDZA
QTR10B OTHH-EHAM
SAS86L LEMG-ESGG
TFL1HL LTBS-EHAM
TFL8VT EHAM-LGZA
TRA6641 EHAM-UGTB

Michel

9

AirNav RadarBox and RadarBox24.com Discussion / Re: Database Update Requests

« Last post by Runway 31 on May 30, 2024, 11:05:50 AM »

Thanks Keith

Alan

10

AirNav RadarBox and RadarBox24.com Discussion / Re: New Station in test EXTRPI617611

« Last post by Runway 31 on May 30, 2024, 11:04:58 AM »

You are getting some fearsome weather!!

Alan