Home' RTCA Documents for Review : DO-201B User Requirements for Navigation Data Contents ED-77A/DO-201BforOpenConsultation/FRAC
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DATA QUALITY [DO-200B/ED-76A] - A degree or level of confidence that the data
provided meets the requirements of the user. These requirements include levels of
accuracy, resolution, assurance level, traceability, timeliness, completeness, and
DATABASE [DO-200B/ED-76A] - One or more files of data structured to enable data to
be extracted from the files and for them to be updated. This primarily refers to data
stored electronically and accessed by computer rather than in files of physical records.
ELEVATION [ICAO Doc 8168] - The vertical distance of a point or a level, on or affixed
to the surface of the earth, measured from mean sea level.
ELLIPSOIDAL HEIGHT [ICAO Annex 15] - The height related to the reference ellipsoid,
measured along the ellipsoid outer normal through the point in question.
END-USER [DO-200B/ED-76A] - The last user in an aeronautical data chain (e.g .,
aircraft operators, airline planning departments, air traffic service providers, flight
simulation providers, airframe manufacturers, application integrators, and regulatory
ERROR [DO-200B/ED-76A] - Defective, degraded, lost, misplaced or corrupted data
elements, or data elements not meeting stated quality requirements.
FINAL APPROACH SEGMENT [ICAO Doc 8168] - That segment of an instrument
approach procedure in which alignment and descent for landing are accomplished.
FIX [FAA Order JO 7110.65] - A geographical position determined by visual reference
to the surface, by reference to one or more radio navaids, by celestial plotting, or by
another navigational device.
Note: Fix is a generic term for a geographical position and is referred to as a fix, waypoint,
intersection, reporting point, etc.
FLIGHT MANAGEMENT SYSTEM (FMS) [DO-200B/ED-76A] - An on-board
computerized management system that integrates aircraft performance information and
positional information derived from navigation sensors with stored navigation and flight
plan details and AIS data, together with manual inputs, to provide piloting instructions.
FLIGHT PATH ALIGNMENT POINT (FPAP) [ICAO Doc 8168] - The FPAP is a point in
the same lateral plane as the LTP or FTP that is used to define the alignment of the final
approach segment. For approaches aligned with the runway center line, the FPAP is
located at or beyond the opposite threshold of the runway. The delta length offset from
the opposite threshold of the runway defines its location.
FORMAT (AS A PROCESS) [DO-200B/ED-76A] -Translating, arranging, packing and
compressing a selected set of data for distribution to a specific target application.
FORMAT (AS A STRUCTURE) [DO-200B/ED-76A] - A structure of data elements,
records and files arranged to meet standards, specifications or DQRs.
GEOID [ICAO Annex 15] - The equipotential surface in the gravity field of the Earth
which coincides with the undisturbed mean sea level (MSL) extended continuously
through the continents.
GEOID UNDULATION [ICAO Annex 15] - The distance of the geoid above (positive) or
below (negative) the mathematical reference ellipsoid.
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