时间：2011-08-27 23:38来源：蓝天飞行翻译 作者：航空 点击：次
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Licensing Authority 1- The authority designated by a contracting State as responsible for the licensing of personnel. 2- The licensing Authority responsibilities include the introduction and development of State licensing legislation and requirements and the power to revoke licences. It also oversees the Licensing Administration (Ref. Developed by Licensing Work Group). Note: In the provisions of the ICAO Annex 1, the Licensing Authority is deemed to have been given the following responsibilities by the contracting State : a) Assessment of an applicant’s qualifications to hold a licence or rating; b) issue and endorsement of licences and ratings; c) designation and authorisation of approved persons; d) approval of training courses; e) approval of the use of synthetic trainers; f) validation of licences issued by other Contracting States. (Ref. ICAO Doc 9569 Definitions). Line of Sight An expression used to indicate that certain radio signals will not propagate through natural or "man-made" obstacles that are in the line-of-sight between the transmitting and/or receiving facilities. Line of Sight Wave Electromagnetic waves with frequencies greater than 30 MHz. They propagate quasi-optical. Line Replaceable Unit A unit, part of a system, which can be exchanged as an entity for a spare of the same type and which may consist of a single printed circuit board, power supply or equipment module. Line Replaceable Unit (LRU) A unit which can and will be changed on-site. Linear Holding The process of absorbing delay by speed reduction, without lateral deviation from the planned route. Link A link connnects an aircraft DLE (Data Link Entity) and a ground DLE and is uniquely specified by the combination of aircraft DLS (Data Link Splitter) address and the ground DLS address. A different sub network entity resides above every link endpoint. Load Threshold Values The sustained hourly rate of entry of new units into a sector. These are added to the units which are left over from the previous hour. Lobing (Antenna pattern) Due to the process of interference of two waves, one direct and one reflected, differences in phases may cause larger or smaller amplitudes than expected for free space, causing differences in signal amplitudes measured : position of large numbers of dB's. This process is called lobing. Local Action Main action required at local level to achieve a local CIP Objective. Tip: to find a specific term, use the Acrobat search : click Local Area Augmentation A local area augmentation is defined as providing additional satellite signals locally in order to enhance the integrity and/or availability and/or accuracy of the GNSS service. A local area data link is required to carry the augmentation services to a user. Local Area Differential GNSS Local Area Differential GNSS is differential GNSS in which the differential corrections are usable for the supported phases of operation within a limited geographical area. Local Area Network A network connecting various data communication devices in a localised geographical area such as a single aircraft, office building or a group of buildings. Local Convergence and Implementation Programme Objective Application of a CIP Objective to a particular ATC unit or area (or group of ATC units or areas) or to a State (or a group of States). Local Target Date Planned date for the completion of a given local action; only included in CIP for monitoring purposes. Local Track Track created by the mono-radar tracking at the level of a radar station. Localiser The azimuth guidance portion of an instrument landing system. Location Indicator A 4-letter code group formulated in accordance with rules prescribed by ICAO and assigned to the location of an aeronautical fixed station. Logical Acknowledgement Provides confirmation from a receiving system that the message has been successfully received and is operationally acceptable for further processing and eventual display to the appropriate person. Logical Acknowledgement Message The positive logical response message used for ground/ground data communications, as defined within the Eurocontrol Standard for On-Line Data Interchange (OLDI). Logical Architecture The logical architecture is needed to visualise, specify and document the decisions about the vocabulary of the domain and the structural and behavioural way those objects in the domain collaborate. Logical Response A Logical response is notified by the receiving system to the originator or an information flow, in order to notify the originator whether the operational content of the received information is acceptable or unacceptable for further processing and/or presentation to the operator. The Logical Response does not replace any required Operational Response. There are two types of Logical Response: Logical Acknowledgement and Error response. Logical Response time-out The Logical Response Time-out represented as (tr) in the Time Sequence Diagrams, is the maximum end-to-end time allowed from the moment the triggering event is issued from the originator user process and the moment the Logical Response is received by the originator user process. It therefore includes: the technical data extraction and composition of the data message that requires a Logical Response; The data transmission and processing; the logical checks at the destination; the transmission and receipt of the Logical Response. |
