Saturday, May 25, 2024

ACMA releases RALI MS48 for interim access to 5055–5065 MHz

Following consultation in May 2022, ACMA has released RALI MS48 to enable access to 5055–5065MHz band for line-of-sight (LoS) remote piloted aircraft system (RPAS) command and non-payload communication (CNPC) links. This will be on an interim basis, pending development of international spectrum arrangements.

These arrangements are:

  • Based on the latest draft version of the relevant ITU document, being PDNR ITU-R.M.[CNPC_CHAR_5GHz], which was last updated at the International Telecommunication Union Radiocommunication sector ITU-R Working Party 5B meeting in July 2022.
  • Limited to the ‘middle’ 10 MHz (5055–5065MHz) of 5030–5091MHz band.
  • Based on a 40 x 250kHz channel raster. PDNR ITU-R.M.[CNPC_CHAR_5GHz] recommends 250 kHz channel bandwidths for CNPC, so the RALI commensurately prescribes a centrally loaded 40 x 250kHz channel plan. This lies within a notional operating radius of 200 km from the registered aeronautical (ground/UACS) station location.

The interim RALI will remain in force only until more permanent arrangements have been consulted on and put in place.


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