Issued: 2025 06 02 1143 UTC
#------------------------------------------------#
#             PROPAGATION WARNING                #
#                BIPT  Ophain                    #
#      50° 39' 30" N    -     004° 21' 00" E	 #
#                                                #
#      POSSIBLE HARMFUL INTERFERENCE DUE TO      #
#                 SPECIAL EVENT                  #
#------------------------------------------------#

BIPT Propagation Bulletin 988
OBSERVATION PERIOD : 2025 06 02 1143 UTC
INTERFERENCE RISK :  Solar activity
We are currently under the influence of significant solar activity.
All three indicators (R, S, G) are elevated.
At present, we are observing a partial degradation of HF communications (R1)
as well as strong geomagnetic activity (G3).

REMARKS : 
R1 : Minor
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.

G3 : Strong
Power systems: Voltage corrections may be required, false alarms triggered on some protection devices.
Spacecraft operations: Surface charging may occur on satellite components, drag may increase on low-Earth-orbit satellites, and corrections may be needed for orientation problems.
Other systems: Intermittent satellite navigation and low-frequency radio navigation problems may occur, HF radio may be intermittent, and aurora has been seen as low as Illinois and Oregon (typically 50° geomagnetic lat.).
For more details : 
https://www.swpc.noaa.gov/communities/radio-communications 

OPERATOR : Serge Marotte

SEE OUR PROGPAGATION GRAPHS : https://propa.bipt.be
Contact us for specific information.

#------------------------------------------------------------------------#
# Belgian Institute for Postal Services and Telecommunications           #
#                                                                        #
# Boulevard du Roi Albert II 32 box 10                                   #
# 1000 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                        #
#------------------------------------------------------------------------#