Astronomy Geographic Advantage Act, 2007 (Act No. 21 of 2007)

Regulations

Protection of the Karoo Central Astronomy Advantage Areas in terms of the Astronomy Geographic Advantage Act, 2007

Schedule D-Regulations restricting interference due to electrical activities within the Karoo central astronomy advantage area 1

6. Determination of the required separation distances
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(1)The required separation distances shall be the distances required to comply with both sub -regulations 3(2)(a) and 3(2)(b) of these Schedule D Regulations, over which distances the electromagnetic and radio signal levels, after signal loss through any mitigation at the site has been taken into account, shall be reduced to the applicable protection levels prescribed in the Protection Levels Regulations, 2012.

 

(2)The frequency dependent propagation path lengths required, shall be determined by physical measurements or by using the applicable methods and standards for propagation calculations listed in Annexure B to these Schedule D Regulations, and shall be the required separation distances for the radio frequency interference signals involved.

 

(3) The measurements or propagation calculations shall be based on the following criteria:
(a) the maximum height above sea level of the electrical equipment or infrastructure;
(b) the ground level height above sea level plus 10 metres at the nearest SKA Infrastructure Territory and the SKA Virtual Centre;
(c) interference levels that will not be exceeded for more than 5% of the time over a twenty -four -hour period;
(d) use of an isotropic antenna with 0dB gain at the nearest SKA Infrastructure Territory and at the SKA Virtual Centre; and
(e) use of a digital terrain model that will produce acceptable results and which may take ground conductivity and clutter data for the Karoo Central Astronomy Advantage Area 1 into account.

 

(4) The required separation distances to comply with sub-regulations 3(2)(a) and 3(2)(b) of these Schedule D Regulations are those reflecting the highest levels of radio frequency interference, respectively at the nearest SKA Infrastructure Territory related to electromagnetic emissions and at the SKA Virtual Centre related to radio signals.