ITU‑R Working Party 5A is making progress on the 23cm amateur band and RNSS (radio navigation satellite service) coexistence.

Over the peri­od 14th to 25th Novem­ber 2022, the prepara­to­ry work for WRC-23 agen­da item 9.1b con­tin­ued in ITU‑R Work­ing Par­ty 5A (WP5A). Two deliv­er­ables are under discussion:

1) Draft ITU‑R Report M.[AMATEUR_CHARACTERISTICS] – this reports on the spe­cif­ic 23cm band ama­teur and ama­teur satel­lite ser­vice tech­ni­cal para­me­ters and oper­a­tional char­ac­ter­is­tics used in the stud­ies now pub­lished in ITU‑R Report M.2513–0.

2) Draft ITU.R Rec­om­men­da­tion M.[AS_GUIDANCE] – this will rec­om­mend guid­ance that nation­al admin­is­tra­tions can take to facil­i­tate the pro­tec­tion of the radio nav­i­ga­tion satel­lite ser­vice from harm­ful inter­fer­ence from ama­teur radio stations.

Since the pre­vi­ous WP5A meet­ing the IARU glob­al WRC23 9.1b team led by G4SJH has been con­sult­ing with the ama­teur com­mu­ni­ty result­ing in a con­tri­bu­tion to the draft guid­ance rec­om­men­da­tion. As usu­al, the IARU par­tic­i­pat­ed in the meet­ing to sup­port the con­tri­bu­tion and take part in the ongo­ing dis­cus­sion and nego­ti­a­tions. Con­tri­bu­tions were also pro­vid­ed by a num­ber of nation­al admin­is­tra­tions and a sum­ma­ry report of the meet­ing can be downloaded.

In gen­er­al the devel­op­ment of the rec­om­men­da­tion is mov­ing in a suit­able direc­tion and many of the IARU pro­pos­als remain in the draft doc­u­ment that will go for­ward to the next meet­ing for fur­ther work.

Mean­while in CEPT the work in project team SE40 con­tin­ues with their devel­op­ment of an ECC Report on the same coex­is­tence prob­lem and also met dur­ing Novem­ber (3–4th).

The work on this top­ic will con­tin­ue through­out next year both in ITU‑R and in the region­al telecom­mu­ni­ca­tions organ­i­sa­tions and the IARU is com­mit­ted to ensure the stud­ies are prop­er­ly inter­pret­ed and that due account is tak­en of the real­i­ties of ama­teur oper­a­tions in this band.

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