Space Weather Message Code: ALTEF3 Serial Number: 3569 Issue Time: 2025 Dec 02 0501 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3568 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 8521 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: 3568 Issue Time: 2025 Dec 01 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3567 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 8310 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: 203 Issue Time: 2025 Dec 01 0314 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2025 Dec 01 0227 UTC Maximum Time: 2025 Dec 01 0249 UTC End Time: 2025 Dec 01 0305 UTC X-ray Class: X1.9 Location: N22E85 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: 502 Issue Time: 2025 Dec 01 0241 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Dec 01 0240 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: 3567 Issue Time: 2025 Nov 30 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3566 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 23005 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 upda ...Continue Reading

AMSAT News Service ANS-334 November 30, 2025 *In this edition:* Registration is open for the 2025–2026 European Astro Pi Challenge Optical Communications Systems Test the Limits of FCC Authority A Protocol Extension for GOLF Operations REALOP CubeSat to Test Hard Drives for ADC System Changes to AMSAT-NA TLE Distribution for [date] ARISS News AMSAT Ambassador Activities Satellite Shorts The AMSAT(R) News Service bulletins are a free, weekly news and information service of AMSAT, the Radio Amateur Sa ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3566 Issue Time: 2025 Nov 29 0500 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3565 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 14759 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 upda ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 501 Issue Time: 2025 Nov 28 2224 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Nov 28 2222 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: 3565 Issue Time: 2025 Nov 28 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3564 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 8297 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

This week there are no additions or deletions to the AMSAT TLE distribution. Keps mailing list -- keps@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/keps@amsat.org To unsubscribe send an email to keps-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org ...Continue Reading