Space Weather Message Code: ALTEF3 Serial Number: 3575 Issue Time: 2025 Dec 09 1210 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3574 Begin Time: 2025 Dec 05 1530 UTC Yesterday Maximum 2MeV Flux: 1040 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3574 Issue Time: 2025 Dec 08 1237 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3573 Begin Time: 2025 Dec 05 1530 UTC Yesterday Maximum 2MeV Flux: 1453 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

Space Weather Message Code: SUMX01 Serial Number: 204 Issue Time: 2025 Dec 08 0513 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2025 Dec 08 0449 UTC Maximum Time: 2025 Dec 08 0501 UTC End Time: 2025 Dec 08 0504 UTC X-ray Class: X1.1 Location: S18W55 NOAA Scale: R3 - Strong NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-sola ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 505 Issue Time: 2025 Dec 08 0502 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Dec 08 0500 UTC NOAA Scale: R2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time in ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3573 Issue Time: 2025 Dec 07 2139 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3572 Begin Time: 2025 Dec 05 1530 UTC Yesterday Maximum 2MeV Flux: 2135 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

AMSAT News Service ANS-341 December 7, 2025 In this edition: * KSLV-II Mission Deploys 13 Satellites, Including New Amateur Radio Payloads * ISS Deployment Added Five New Education-Focused Amateur Radio Missions * ARISS Moves Series 30 SSTV Transmissions to RS-38S After Equipment Issue * GridMasterMap Satellite Top 100 Rovers December 2025 Rankings * Changes to AMSAT-NA TLE Distribution for December 5, 2025 * ARISS News * AMSAT Ambassador Activities * Satellite Shorts From All Over The AMSAT® News Service bu ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 504 Issue Time: 2025 Dec 06 2041 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Dec 06 2037 UTC NOAA Scale: R2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time in ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3572 Issue Time: 2025 Dec 06 1234 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3571 Begin Time: 2025 Dec 05 1530 UTC Yesterday Maximum 2MeV Flux: 1426 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3571 Issue Time: 2025 Dec 05 1545 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Dec 05 1530 UTC Station: GOES-19 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product ...Continue Reading

SB KEPS @ AMSAT $ORB25339.1 2Line Orbital Elements 25339.AMSAT QST de W1STR AMSAT Orbital Elements for Amateur Satellites in TLE Format From Orbital Analysis Office New England Sci-Tech STEM Education Center Natick MA December 05, 2025 To all radio amateurs These element sets describe the orbits of various satellites in use by the amateur radio community. For details see: www.amsat.org/keplerian-elements-formats/ A daily update of element sets is available at: www.amsat.org/tle/daily-bulletin.txt or wit ...Continue Reading