Tip: to find a specific term, use the Acrobat search : click
on the binocular icon in the window bar menu

Crossing (rate) The probability that the State Error is more than a certain criterion (e.g. the Three RMS or the Three Sigma criterion or any user specified criterion). Cruise Climb An aircraft cruising technique resulting in a net increase in altitude as the aeroplane mass decreases. Cruising Level A level maintained during a significant portion of a flight. Culture A system of beliefs, values, customs and institutions shared and transmitted by members of a particular society, from which people derive meaning for their work, love and leisure activities (Peterson, et al., 1991). Current Flight Data (MTCD) Flight data (MTCD) which has been updated with latest available flight plan changes and/or controller inputs. Current Flight Plan The flight plan, including changes, if any, brought about by subsequent clearances. When the word ‘message’ is used as a suffix to this term, it denotes the content and format of the current flight plan data sent from one unit to another. Current Flight Position A ground-referencerable representation, in x, y, z of the current position of a flight based on latest sensor data. Current System Trajectory Position A projection of the current flight position on to the flight’s system trajectory that serves to determine the longitudinal conformance. Current Track position see Current System Trajectory Position Customer Users of the air traffic system (e.g. airlines, general aviation). Cut-off Score A score in a predictor distribution of test scores below which candidates are rejected. Cycle slip An error in the continuous count of carrier phase cycles. Cyclic Redundancy Check A set of redundant data in a protocol data unit (PDU) which allow the detection and correction of a class of transmission errors.
D
Danger Area
1- Is an airspace of defined dimensions within which activities dangerous to the flight of aircraft may exist at specified times.
2- In the context of the FUA Concept, some Danger Areas subject to management and allocation at Level 2 are established at Level 1 as ‘AMC - manageable areas’ and identified as such in AIP.

Tip: to find a specific term, use the Acrobat search : click D on the binocular icon in the window bar menu
Data
1- A representation of facts, concepts or instructions in a formalised manner suitable for
communication, interpretation or processing by human or automatic means;

2- Any representations such as characters or analogue quantities to which meaning is, or might be, assigned Data Acquisition Data can be retrieved in the SASS-C system by several means. It can be read from a file on disc
(e.g. pre-recorded RASS-S file), from a LAN connection, from an external storage medium (e.g. tape) or via the EMULEX card. While data is retrieved it can be pre-filtered to minimise disc usage and it has to be converted to use it within SASS-C.