Part 2 Requirements
3 Project Lifecycle Milestones
3.1 The following stages in a surveillance project involve decisions which affect the final system. At these stages the Applicant should forward the documentation raised to the CAA for stage assessment:
a) Operational requirements (302).
b) Requirements capture (303).
c) Project management (304).
d) System hazard analysis (305).
e) Frequency allocation (306).
f) Design and theoretical assessment (307).
g) Radio site clearance (308).
h) Post installation support assessment (309).
i) Flight trial (310).
4 Requirements of Applicant
4.1 Ownership
The Applicant shall identify the ownership of and operational responsibilities for the equipment (311).
4.2 Project responsibilities The following posts and lines of communication require definition. a) Applicant The person to whom the CAA will issue the approval (312). The Applicant shall identify an appropriate contact at the Aerodrome through whom
the CAA would channel requests for information (313). b) ATS Provider This person is the holder of the ANO Article 169 approval to provide the ATS service
at the facility (314).
5 Hazard Analysis
5.1 The Applicant shall produce a model of how the function of the equipment is to fit within the ATC environment (315). This will consider the effects resulting from a failure or loss of integrity of the equipment and its implications for ATC safety. Such a model would derive the critical components, determine the resultant failure modes and the results of such failures. From such a model, determine the following aspects:
a) The required reliability and integrity of the system (316).
b) Maintainability requirements; e.g mean time to repair (MTTR) (317).
c) Degree of design assurance required (318).
d) The accuracy and resolution requirements of the system (319).
e) Coverage requirements (320).
f) Data handling capacity (321).
g) The Target Level of Safety (TLS) for the operational service (322).
6 Frequency Allocation and Clearance to Transmit
6.1 At this point it is usual to make a request for frequency allocation. This takes place in two parts:
a) Primary. (Frequency)
b) Secondary. (Clearance to transmit)
6.2 The CAA co-ordinates the allocation of codes, PRF and frequency along with the National IFF/SSR Committee and AP 8. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址:CAP 670 Air Traffic Services Safety Requirements 2(80)