Summary of the First Meeting Special Committee 227 ... - RTCA
Summary of the First Meeting Special Committee 227 ... - RTCA
Summary of the First Meeting Special Committee 227 ... - RTCA
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• flight deck display <strong>of</strong> speed cues<br />
• evaluating feasibility <strong>of</strong> making constraints while following ano<strong>the</strong>r aircraft<br />
• FET allocation and winds<br />
Improving separation standards with ADS-B and Navigation<br />
o Need accurate nav and surveillance combined to provide benefit<br />
o Use surveillance to “cut <strong>the</strong> tails <strong>of</strong>f” <strong>the</strong> navigation errors.<br />
Regarding interval management vs. 4D TBO, Bruce advocated implementing both technologies and using<br />
<strong>the</strong>m regionally as appropriate.<br />
Additional Considerations<br />
Bruce also pointed out o<strong>the</strong>r possible areas <strong>of</strong> change in <strong>the</strong> updates.<br />
position estimation<br />
o need our standard to not depend upon GNSS specifics, because <strong>the</strong>se will change.<br />
integration with approach operations<br />
o e.g. transition between RNP route and ILS is not defined<br />
o dynamic RF-leg trombone called by controller (over data comm.)<br />
alignment with stand-alone navigator – SC159<br />
o SC159 dumbed down SC181 result to create a GA product, but it has become a headache<br />
to maintain two nav standards.<br />
WG85 Activities - Sylvain Raynaud<br />
Sylvain Raynaud, Airbus FMS Engineer, Eurocae WG85 Chairman<br />
Powerpoint: “WG 85 activities presentation.ppt”<br />
Sylvain stated that <strong>the</strong> WG85 efforts started in Oct 2009, and that <strong>the</strong>re have been 5 meetings, and 19<br />
webexes to date. The ED75 addendum containing updated requirements for ETA and Time <strong>of</strong> Arrival<br />
Control has been drafted. The current draft is as <strong>of</strong> June, 2011.<br />
Validation activities that are supporting <strong>the</strong>ir efforts are:<br />
Prior experiments – Cassis, NUP II<br />
Seattle RTA trials<br />
SESAR Initial 4D validation<br />
The WG85 publication target is mid 2013.<br />
This ensures coordination with WG78/SC214<br />
It supports certification <strong>of</strong> Initial4D-capable certified systems to meet SESAR timetable<br />
Their operational assumptions are based on SESAR and <strong>the</strong> WG78 4DTRAD OSEDs. Sylvain provided<br />
a high level overview <strong>of</strong> <strong>the</strong> concept <strong>of</strong> operations with emphasis on <strong>the</strong> trajectory , aircraft/ground<br />
exchanges and expected benefits.<br />
The ED75 addendum draft criteria that support <strong>the</strong> 4D aspects <strong>of</strong> <strong>the</strong> operations are:<br />
TOAC remains optional<br />
ETA in open loop operations characterized<br />
Meteo error assumptions created<br />
RTA 95% reliability defined<br />
ETA min/max function defined for 95% confidence<br />
RTA precision down to 10 seconds in terminal airspace or en-route airspace<br />
Means <strong>of</strong> compliance updated/created<br />
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