Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p199
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 199/225)
Character Range: 832424–835194

facility restricted area and area of interest (illustrates matters)

       (2) For an HF receive antenna, the aerodrome operator must refer the following for assessment by the communications service and facility provider responsible for the HF receive antenna, as illustrated in Figure 19.13 (2):

(a) any proposed development, pole, antenna, welding, surveying, construction or crane operation within 100 m of the antenna (the restricted area);

(b) any proposed development between 100 m and 600 m from the centre of the antenna that would exceed an angle of elevation of 2.5° from 10 m above ground level at the centre of the antenna, including the area above the restricted area (the area of interest).

     Figure 19.13 (2)   HF receive facility restricted area and area of interest (illustrates matters)

19.14 Protection of satellite ground stations (SGSs)

       (1) An SGS antenna within an aerodrome boundary must have a clear line of sight to:

(a) the intended operating satellite on the geostationary arc; and

(b) an alternative satellite that may be used following a failure of, or to substitute for, the intended operating satellite.

       (2) Unless otherwise advised by the SGS service and facility provider (the provider), the aerodrome operator must ensure that an SGS antenna is sited to allow alignment to any satellite located on the geostationary arc between 122 and 172 East longitude (corresponding to Asiasat4 and GE23).

Note   This is the arc of potential interest to Airservices Australia and will result in an angle of elevation greater than 20° for any site in Australia.

       (3) The provider must ensure that the minimum clearance, from the edge of the antenna to any proposed development referred for assessment under section 19.01, is as follows with reference to the bore sight of the antenna for all possible satellites, as shown in Figure 19.14 (3):

(a) 10° — for all electrically-passive items; and

(b) 30° — for any electrically-active items;

Note   CASA recommends that minor obstructions such as guy wires should be avoided if possible but will usually have minimal impact on the performance of large antennas. Allowance should be made for aircraft flight paths which may intersect the antenna beam at close range. If possible, antennas should be located to ensure that aircraft do not cross through the bore sight when on the ground or at low altitudes.

       (4) The aerodrome operator must refer any proposed development to the provider for assessment if the development would be:

(a) both:

 (i) within 0 m and 30 m of the SGS; and

 (ii) within ± 90° azimuth from True North centred on the SGS, regardless of the height; or

(b) all of the following:

 (i) between 30 m and 150 m of the SGS;

 (ii) within ±