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-   -   Tassie gets Multilaterated! (https://www.pprune.org/australia-new-zealand-pacific/244186-tassie-gets-multilaterated.html)

Scurvy.D.Dog 23rd Sep 2006 04:00

… fair questions
.
juFj

Erm, I understand there will be 8 groundstations, an aircraft has to be within range of 3 to provide a return. The three have to be close together for ground monitoring, far apart for enroot.
… I have heard 18 (around the state) .. just yesterday from the guy who will over see installation!!

Once commisioned I don't think they'll need the present radar, and it may go before then anyhow.
… you may well be right … but the reason would have to be VERY compelling as explained above …. You know the company charter …. Never unreasonably reduce safety levels etc etc!! :ok:
.
peuce

... what happens now when there's one inbound on the ILS in cloud and one wants to depart?
…. Depends on cloud base, types and visibility. In short:-
.
- If an Aircraft on a straight in precision approach can be established outside 5nm from the ‘threshold’ (in our case 6DME) by the time the departure is airborne, and consideration of missed approach is made i.e. if the arrival is a jet and the departure is a C404 then a greater margin is required, as well as options assessment i.e. once visual, would/could the jet fly a visual circuit pior to landing or is an IMC missed approach procedure required??
- If an aircraft is on a DME arrival, again cloud base and other factors such as possible missed approach are all considered in the mix.
.
there are other considerations, those are just some of them!
.

Sounds very familiar ... closing on-site Flight Service Units (Broken Hill, Dubbo etc) and remoting them back to the Centres ... despite all the shortcomings you mentioned above, it went ahead ...
… true .. although ‘separation’ services are way different to ‘traffic services’ … interesting isn’t it that a return of ‘F’ is being seriously looked at!!!

If and when they seriously start talking about this stuff, you better have a good "money" argument on hand .. that's what talks these days!
… indeed! .... as should you guys 'the customers', cause it won't be my hip pocket that pays for the possible delays .... less for more ... sound familiar :(

P.S. The Broncos won!
.. who cares … I was referring to real footy :E …. The red and white ….. Go you good things …! :}

Chapi 12th Mar 2010 09:07

:ok:


Guess it is official then! This will mean a radar-like service down to ground level at Launceston & Hobart with only mode C transponders in the aircraft!
Wide area multilateration went live today in Melbourne Centre.

Surveillance to the ground at Hobart plus ADSB coverage 250Nm around Tassie.

So when's the radar being relocated?

Jabawocky 12th Mar 2010 11:31

Bugger!

I wont be able to sneak into Launie with a surprise attack on Scurvy D Dog then :}

Capn Bloggs 14th Mar 2010 04:53


So when's the radar being relocated?
On the 1st of April...to Karratha! :}

PS. No dogs allowed! :}:}

fanning 15th Mar 2010 01:34

Just following up from the above comment RE this not being displayed in the TSAD.

Heard on the airwaves this morning, Hobart Tower talking to some VFR planes, that they could seem them on their "new system", so presumably the feed IS going into HB and LT TSAD's :confused:

Jabawocky 15th Mar 2010 12:21

Sounds good...... but I want the ILS, even if its 8/8ths and VMC :}

In fact if it is, I reckon the Dog might get some Retard Time! :ok: Last time I flew with him the bastard was disgustingly good! :suspect:

Dick Smith 19th Mar 2010 23:58

"When commissiond in early 2008"

So what's happened? Surely not another Super Seasprite disaster?

le Pingouin 20th Mar 2010 11:02

What's happened? It's commissioned is what. Maybe you need to check out the vision correction thread :}

As Chapi mentioned on the 12th:

Wide area multilateration went live today in Melbourne Centre

Dick Smith 21st Mar 2010 05:27

Does that mean it is actually commissioned and certified to separate aircraft?

What's the separation standard approved?

Freedom7 21st Mar 2010 10:37

It is certified for separation utilising both WAMLat triangulation and ADS-B. 5nm

Ask CASA why it took longer than anticipated to commission

Dick Smith 22nd Mar 2010 00:10

CASA, why did it take so long to commission?

CrazyMTOWDog 22nd Mar 2010 02:15

The Muppet thread is not here.

le Pingouin 22nd Mar 2010 07:36

Why so long? It's new technology so needs all manner of approvals, supporting evidence to prove it's up to the task & can be integrated into the current system? Just little things like that.

The accuracy is apparently considerably better than SSR radar.

PLTOFF4LIFE 22nd Mar 2010 13:25


an aircraft has to be within range of 3 to provide a return.
Actually you need at least 4, sorry to be a nerd

LeadSled 23rd Mar 2010 03:28

PLTOFF4LIFE
How did you work that one out --- theoretically at least, all you need is two to fix a position. However , I do accept that the more the merrier, or more particularly, the more you have, the smaller the CEP.
Tootle pip!!

ARFOR 23rd Mar 2010 03:50

3 needed for minimum 'accurate' triangulation [azimuth accuracy] + plus one for single point failure redundancy.

Is my guess :E

le Pingouin 23rd Mar 2010 06:31


the smaller the CEP.
That is the point!

MrApproach 26th Mar 2010 07:49

The separation standard in TAS is 5 nm and the MLAT also receives any ADS-B that might be around. It is used in ML for separation and displayed on TSAD, but TSAD is a situational awareness tool not a separation tool. Upgrades and ASA decision required to use for approach control. LT and HB radar towers, I don't think so!

SY is now being multilaterated to replace the PRM. Even more accurate multilat than Tassie. 3 nm separation in TMA and PRM separation on final approaches to 16/34 parallels. I'm told no procedure changes so you pilots will not notice the difference. PRM controllers however will, display will look more like Eurocat.

Starts with P 26th Mar 2010 21:51


PRM controllers however will, display will look more like Eurocat.
Does that mean we get an upgraded sim as well? Maybe run it on a 386? :} :ok:


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