ADS-B by 2020 or you don't get to play in Class A, B or C

Re: ADS-B by 2020 or you don't get to play in Class A, B or

It sure would be nice if the government could subsidize some of these GA changes for NextGen. This one seems to be the most burdensome for GA. I know the AOPA is trying to fight it but I don't see the FAA backing away from it just because they lobbied strongly against it. The winds of change are too strong.
 
Re: ADS-B by 2020 or you don't get to play in Class A, B or

KSCessnaDriver said:
And a WAAS equipped GPS in order to feed altitude data to the ADS-B system.
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Don't know much about ADS-B, (my aircraft has ADS-A/ADS-C, but I understand that ADS-B is quite a bit different), but can't the ADS-B read altitude from the altimeter instead of from the GPS? And if it does need to read from the GPS, does the GPS necessarily need to be WAAS compatible?

I know that my systems' GPS is not WAAS-- unfortunately I don't know whether or not alt. comes from the ADC's, the transponder mode C, transponder mode S, or from the GPS. And of course we're talking ADS-A anyway, which is a different kettle of fish.
 
Re: ADS-B by 2020 or you don't get to play in Class A, B or

fish314 said:
Don't know much about ADS-B, (my aircraft has ADS-A/ADS-C, but I understand that ADS-B is quite a bit different), but can't the ADS-B read altitude from the altimeter instead of from the GPS? And if it does need to read from the GPS, does the GPS necessarily need to be WAAS compatible?
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Its not that the altitude data from WAAS is required, its the navigational capability that's required to meet the ADS-B requirement. The NPRM released yesterday mandates (for ADS-B Out) navigational accuracy of 0.05nm and navigational integrity of 0.2nm. Currently there is only one navigational source capable of providing that, WAAS. There was another, but it was shut down in February (eLoran). So, if you want to fly in class A, B, C or above 10,000 MSL, you have to have ADS-B out and WAAS. Then you need some sort of MFD to display that info, if you don't already have it.

The transponder you need is either going to be a 978 MHz UAT, which currently aren't integrated with Mode C/S transponders. So, if you go that route, you've got to have a conventional transponder as well. Or you can go down the 1090ES route (Mode S) and be ok. Couple that with the fact that based upon the NPRM the average altitude one is going to have to be at to receive the weather data is roughly 5,500 AGL. Based on 800 total ground based transmitters, spaced roughly 150-200 nm apart. Figure an average of 175 nm between them, and you could be 87.5 nm from a station. Line of site calculation, and well, the system doesn't do much for flying low (where a majority of the aircraft in the country fly).

Edit: We've got 10 years to do all that, assuming that Congress doesn't get involved (like they already have). The current FAA bill in the house makes ADS-B mandatory by 2015.
 
Re: ADS-B by 2020 or you don't get to play in Class A, B or

dasleben said:
This is true. All those falling skyscrapers in Amish country PA really could do some damage. :bandit:
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Well, if you're cruising along at 30'... Hell, I'm sure some of the barns are taller than that!

-mini
 
Re: ADS-B by 2020 or you don't get to play in Class A, B or

Is this going to be "mandatory" like the 406 mHz ELT's that were supposed to have like 2 years ago? (it keeps getting pushed back)
 
Re: ADS-B by 2020 or you don't get to play in Class A, B or

SIUav8er said:
Is this going to be "mandatory" like the 406 mHz ELT's that were supposed to have like 2 years ago? (it keeps getting pushed back)
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As far as I know, the only place that had the mandatory 406MHz ELT was Canada, and they've granted an extension on it. Other than that, to my knowledge, there never has been an American 406MHz ELT mandate.
 
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