Space Weather Message Code: ALTXMF Serial Number: 526 Issue Time: 2026 Apr 26 2300 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 26 2257 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

AMSAT News Service ANS-116 April 26, 2026 In this edition: * AMSAT Update from 2026 CubeSat Developers Workshop Available Online * AMSAT-HB Announces Results of 2026 HB9RG Trophy Distance Competition * Rocket Lab Launches Eight JAXA Satellites on Kakushin Rising Mission * KrakenRF Discovery Drive Rotator Campaign Exceeds $314k Funding Goal * Changes to AMSAT TLE Distribution for April 24, 2026 * ARISS News * AMSAT Ambassador Activities * Satellite Shorts From All Over The AMSAT® News Service bulletins are a ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 525 Issue Time: 2026 Apr 24 1812 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 24 1812 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: SUMX01 Serial Number: 216 Issue Time: 2026 Apr 24 0826 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2026 Apr 24 0801 UTC Maximum Time: 2026 Apr 24 0813 UTC End Time: 2026 Apr 24 0818 UTC X-ray Class: X2.5 Optical Class: 2b Location: N20W90 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, strong ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 524 Issue Time: 2026 Apr 24 0812 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 24 0812 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: 3684 Issue Time: 2026 Apr 24 0505 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3683 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 3446 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: 215 Issue Time: 2026 Apr 24 0131 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2026 Apr 24 0051 UTC Maximum Time: 2026 Apr 24 0107 UTC End Time: 2026 Apr 24 0113 UTC X-ray Class: X2.4 Location: N17W71 NOAA Scale: R3 - Strong Comment: Accompanied by a tenflare with a castelli-U signature. No radio observations currently available. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potenti ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 523 Issue Time: 2026 Apr 24 0108 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 24 0105 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

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

SB KEPS @ AMSAT $ORB26114.1 2Line Orbital Elements 26114.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 April 24, 2026 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 withou ...Continue Reading