[TheList] Auckland air Traffic control

Mon Apr 12 20:27:03 AEST 2010

Hi Denis,

I haven't done it myself... But come to think about it a bit, I expect 
it would be lots of SCPC Narrowband FM signals. This means the 
transponder power would be distributed amongst all these different 
signals. I wouldn't be at all surprised if it required a (much?) larger 
dish because of this.

As for what's available, on which bird and why I have no real idea.

What I am aware of is the majority of flight routing is handled by 
Christchurch ATC, maybe some or all of this traffic on the satellite is 
the linking to the remote sites.

As for the cost of a PLL LNB, they were about 5 times the price of a 
standard LNB back then. Times have changed dramatically since then. 
LNBF's are the order of the day now, maybe PLL LNBF's are available, 
maybe you need to buy a PLL LNB and a seperate feed like the old days.

I made a couple of calls tonight. The guys I knew who were doing it 
aren't anymore, they both were using 1.8m andrews spun prime focus 10 
GHz microwave dishes converted to satellite. The LNB's were sold with 
the dishes to other Hams.

Regards,

Neill.

Denis Dawson wrote:
> Last time I heard/read about this it was only on one of the Optus satellites
> D2 from memory so most NZers would have a SKY dish up and won't be looking
> at D2.
> Denis
>
> -----Original Message-----
> From: thelist-bounces at radiowiki.org.nz
> [mailto:thelist-bounces at radiowiki.org.nz] On Behalf Of Neill Ellis
> Sent: Monday, 12 April 2010 5:24 p.m.
> To: thelist at radiowiki.org.nz
> Subject: Re: [TheList] Auckland air Traffic control
>
> Hi Kevin,
>
> I haven't done it myself, but as I understand it you can indeed listen 
> to some of the ATC feeds on satellite.
>
> You obviously still need a power feed to the LNB, so most people use a 
> splitter with power pass only on one port, that port going to the 
> satellite receiver that powers the LNB. You connect a scanning receiver 
> to the port on the splitter that is DC isolated to prevent the power to 
> the LNB damaging your scanner.
>
> The scanner needs to be able to tune into the frequency range coming out 
> of the LNB, which could be anywhere from 950MHz to 2400MHz depending 
> upon your LNB and it's Local Oscillator.
>
> Here's the slightly difficult bit! The Local Oscillator in most LNB's is 
> not locked to a stable reference such as a crystal, so they tend to 
> drift up and down a bit. You will need to find out what frequency the 
> Local Oscillator actually is to calculate what frequency your scanner 
> needs to tune to. Then again it's going to be changing with temperature 
> drift etc.
>
> Those who do this that I know have bought expensive PLL locked LNB's 
> where the Local Oscillator is locked to a stable crystal reference to 
> stop this wandering, even then they still do wander a little, but 
> nowhere near as bad as a normal LNB.
>
> Avcomm in Sydney stocked this PLL LNB's last time I needed one for 
> another project, they weren't cheap, but I expect the likes of Jayx, 
> Supreme Antennas, Hooktech could also provide them here in NZ.
>
> Reality is, if you live outside the geographic area of interest this is 
> a realistic way of listening in. But if you live in the area a simple 
> aerial and cheap scanner and you are in business. Scanners with the 
> higher UHF frequencies required to listen to ATC generally cost quite a 
> bit more.
>
> Regards,
>
> Neill.
>
>
> Kevin Cosgrove wrote:
>   
>> Hi  
>>
>> Am I reading this right.  Can you listen to ATC from Auckland via a dish
>>     
> and a scanner  Are these frequencys satellite fed
>   
>> Thanks
>>
>> Kevin
>> On 11/04/2010, at 9:00 PM, Neill Ellis wrote:
>>
>>   
>>     
>>> Well, there's a list posted elsewhere someone might like here :-)
>>>
>>>
>>> -------- Original Message --------
>>> Date: 	Sun, 11 Apr 2010 20:13:25 +1200
>>>
>>>
>>>
>>> Bank 1) Auckland International 1 NZAA Tower Primary 118.700
>>> 2 NZAA Tower Secondary 120.800
>>> 3 NZAA Delivery 128.200
>>> 4 NZAA Ground 121.900
>>> 5 NZAA Apron 123.000
>>> 6 NZAA ATIS 127.800
>>> 7 Ramp (Air NZ Int'l) 131.900
>>> 8 Ramp (Air NZ Domestic) 132.900
>>> 9 Ramp (Air NZ Link) 131.000
>>>
>>> Bank 2) Auckland Regional Control 11 Auckland Control 129.500 12 Auckland
>>>       
> Area Control 120.500
>   
>>> 13 Auckland Approach 124.300
>>> 16 Christchurch Control Central North Island 119.500
>>> 17 Auckland Control 129.6
>>> 18 Auckland Oceanic Control Primary 123.900
>>> 19 Auckland Oceanic Control Secondary 134.000 20 Christchurch Information
>>>       
> (Akl region) 118.500
>   
>>>
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