Space Weather Message Code: ALTEF3 Serial Number: 3670 Issue Time: 2026 Apr 09 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3669 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 7322 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: 3669 Issue Time: 2026 Apr 08 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3668 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 7359 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: 3668 Issue Time: 2026 Apr 07 0500 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3667 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 6075 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: 3667 Issue Time: 2026 Apr 06 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3666 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 5995 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: 3666 Issue Time: 2026 Apr 05 0507 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3665 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 2419 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

*In this edition:* 44th AMSAT Space Symposium and Annual Membership Meeting Announced ARISS Solicits School Contacts for 2007 VUCC & DXCC Standings April 2026 ​ARISS and AMSAT: On Track to Track Artemis 2 GridMasterMap Satellite Top 100 Rovers April 2026 Rankings Changes to AMSAT TLE Distribution for April 3, 2026 ARISS Plans SSTV Event for April Ambassador Events ARISS News Satellite Shorts from All Over The AMSAT(R) News Service bulletins are a free, weekly news and information service of AMSAT, ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3665 Issue Time: 2026 Apr 04 1158 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3664 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 4465 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: ALTXMF Serial Number: 522 Issue Time: 2026 Apr 04 0117 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 04 0117 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: 3664 Issue Time: 2026 Apr 03 0936 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2026 Apr 03 0920 UTC Station: GOES19 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

The following satellites have been added to this week's AMSAT TLE distribution. They have provisional object numbers that will change once official USSF/NORAD numbers are assigned HADES-SA/SpinnyONE Provisional ID 71958 LILIUM-4 Provisional ID 71922 PARUS-6U1 Provisional ID 71919 JACK-002 Provisional ID 71927 SAL-E Provisional ID 71904 DISCO-2 Provisional ID 71908 Keps mailing list -- keps@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/keps@amsat.org To unsubscribe sen ...Continue Reading