Issued: 2023 07 19 1108 UTC #------------------------------------------------# # PROPAGATION WARNING # # BIPT Ophain # # 50° 39' 30" N - 004° 21' 00" E # # # # POSSIBLE HARMFUL INTERFERENCE DUE TO # # SPECIAL EVENT # #------------------------------------------------# BIPT Propagation Bulletin 850 OBSERVATION PERIOD : 2023 07 19 1108 UTC INTERFERENCE RISK : Moderate solar activity REMARKS : For the past few days, we have been observing some solar activity. This moderate activity can impact the quality and reliability of radio transmissions. * frequency bands concerned: LF MF low HF * Effects: absorption of RF energy due to the D layer * Risks = partial blackout * Comments: transmissions via the poles are particularly impacted See : https://www.swpc.noaa.gov/communities/radio-communications for more informations. OPERATOR : Serge Marotte SEE OUR PROGPAGATION GRAPHS : https://propa.bipt.be Contact us for specific information. #------------------------------------------------------------------------# # Belgian Institute for Postal Services and Telecommunications # # # # Ellipse Building C # # Boulevard du Roi Albert II 35 box 1 # # 1030 Brussels # # Tel.: 32 (0) 2 226 88 88 # # info@bipt.be # # # # Please do not reply directly to this message, but send comments # # and suggestions to 'propa@bipt.be'. # # To subscribe or unsubscribe, send a mail to 'propa@bipt.be' # # For more information, see https://propa.bipt.be # #------------------------------------------------------------------------#