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home | newest check | boards | help index | log | ps | userlogin | send sysop | slog | status forward | bcm news | users | version | remove cookieHP2DFA > NEWS 15.10.26 22:11l 70 Lines 3833 Bytes #10 (0) @ WW BID : 4534_HP2DFA Subj: RADIO ASTRONOMY WARNING FOR AMATEUR RADIO & ROADMAP TO WRC-2 Path: JH4XSY<IW0QNL<HB9ON<HB9ON<PI8ZTM<DM4RW<HP2DFA Sent: 261015/1302Z 4534@HP2DFA.#COL.PAN.CEAM BPQ6.0.24 RADIO ASTRONOMY WARNING FOR AMATEUR RADIO & ROADMAP TO WRC-27 SOURCE: BALTHASAR INDERMUEHLE (CSIRO / ITU-R WP 7D) / WIA VALID: 16-OCT-2026 ONWARDS ISSUED VIA BPQ32 NODE HP2DFA-5 IN PANAMA ====================================================================== 1. INTRODUCTION & OVERVIEW ====================================================================== AS THE GLOBAL COMMUNITY PREPARES FOR THE 2027 WORLD RADIOCOMMUNICATION CONFERENCE (WRC-27), EXPANDING SATELLITE FLEETS AND AGGREGATE UNWANTED EMISSIONS ARE RAISING SERIOUS CONCERNS REGARDING THE FUTURE PROTECTION OF RADIO SPECTRUM, INCLUDING ALLOCATIONS UTILIZED BY AMATEUR RADIO OPERATORS. AN ITU ARTICLE AUTHORS BY AUSTRALIAN SCIENTIST BALTHASAR INDERMUEHLE (CSIRO SPECTRUM MANAGER AND CHAIR OF ITU-R WORKING PARTY 7D) TITLED "RADIO ASTRONOMY AT THE REGULATORY CROSSROADS: WRC-27 AND BEYOND" HIGHLIGHTS THAT SPECTRUM CONGESTION THREATENS SCIENTIFIC OBSERVATION AND AMATEUR EXPERIMENTATION ALIKE. ====================================================================== 2. SATELLITE PROLIFERATION & AGGREGATE INTERFERENCE ====================================================================== - TENFOLD INCREASE: ACTIVE LOW EARTH ORBIT (LEO) SATELLITES HAVE INCREASED FROM ~1,500 DURING WRC-19 TO OVER 15,000 ACTIVE SPACECRAFT TODAY. - FUTURE PROJECTIONS: ITU PROPOSALS POINT TO FUTURE CONSTELLATIONS TOPPING 100,000 ACTIVE SATELLITES. - AGGREGATE THREAT: RECEIVERS NO LONGER FACE ISOLATED TRANSMITTERS; INSTEAD, THEY MUST CONTEND WITH COMBINED UNWANTED EMISSIONS FROM THOUSANDS OF FAST-MOVING SPACECRAFT OVERHEAD. - THRESHOLD BREACHES: RECENT MEASUREMENTS DEMONSTRATE THAT AGGREGATE UNWANTED EMISSIONS BREACH ESTABLISHED INTERFERENCE PROTECTION LIMITS BY MULTIPLE ORDERS OF MAGNITUDE EVEN WHEN INDIVIDUAL TRANSMITTERS COMPLY. ====================================================================== 3. AMATEUR RADIO SPECTRUM CHALLENGES ====================================================================== - MULTI-SOURCE INTERFERENCE: AMATEUR BANDS SUFFER FROM DEFECTIVE CONSUMER ELECTRONICS, SWITCHING POWER SUPPLIES, SOLAR INVERTERS, BROADBAND INFRASTRUCTURE, AND UNWANTED EMISSIONS FROM COMMERCIAL SERVICES. - IMPACT ON WEAK-SIGNAL OPERATIONS: DIRECTLY HINDERS EME (EARTH-MOON-EARTH), SATELLITE COMMS, MICROWAVE EXPERIMENTATION, AND LONG-DISTANCE HF DXING WHERE ELEVATED NOISE FLOORS PREVENT SIGNAL RECEPTION. - COMMERCIAL & REGULATORY PRESSURES: AMATEUR SERVICES MUST COMPETE FOR SPECTRUM ACCESS AGAINST COMMERCIAL TELECOM AND SATELLITE CONGLOMERATES. ====================================================================== 4. PREPARATIONS FOR WRC-27 & ADVOCACY IMPORTANCE ====================================================================== - CONFERENCE DATES: WRC-27 WILL TAKE PLACE IN SHANGHAI, CHINA, FROM 18 OCTOBER TO 12 NOVEMBER 2027. - DECISION IMPACT: CONCLUDES BINDING REVISIONS TO INTERNATIONAL RADIO REGULATIONS GOVERNING SATELLITE SERVICES, SPECTRUM SHARING, AND NOISE LIMITS. - ADVOCACY ROLE: INTERNATIONAL AMATEUR RADIO UNION (IARU) AND NATIONAL SOCIETIES (SUCH AS WIA AND ACMA) PROVIDE ESSENTIAL TECHNICAL EXPERTISE AND ADVOCACY TO SAFEGUARD AMATEUR ALLOCATIONS AT REGULATORY TABLES. ====================================================================== 5. KEY TAKEAWAYS & RECOMMENDED ACTION ====================================================================== - ALLOCATION VS USABILITY: AN OFFICIAL ALLOCATION IS VALUELESS IF AGGREGATE NOISE PREVENTS PRACTICAL COMMUNICATION AND EXPERIMENTATION. - COMMUNITY ENGAGEMENT: AMATEURS ARE ENCOURAGED TO DOCUMENT RFI, SUBMIT TECHNICAL MEASUREMENTS, AND ACTIVELY SUPPORT IARU AND NATIONAL SOCIETY REGULATORY ADVOCACY. OFFICIAL SOURCES & LINKS: ITU.INT / IARU.ORG / WIA.ORG.AU NODE CONTACT MAIL: HP2DFA@GMAIL.COM / HP2DFA-5@BPQ32 73 DE HP2DFA-5 / BPQ32 NODE PANAMA
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