[TowerTalk] FAA & Private Airstrips

[Jim Lux]

On 12/30/11 9:17 AM, Jim Lux wrote:
> On 12/30/11 8:49 AM, Mike Ashby wrote:
>>
><snip of measurement process>
>
<snip of my GPS discussion>


WAAS performance standard for vertical NAV is 20m or 4m depending on the 
receiver and flight phase (LPV or LPV-200). (95% confidence interval)

LPV = Localizer Precision with Vertical Guidance

In pratice, the FAA says that they've never observed a vertical error 
greater than 12m.