Space Weather Message Code: ALTEF3 Serial Number: 3519 Issue Time: 2025 Aug 21 1744 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Aug 21 1735 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

Space Weather Message Code: ALTEF3 Serial Number: 3518 Issue Time: 2025 Aug 18 0622 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3517 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 8023 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: 3517 Issue Time: 2025 Aug 17 0827 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3516 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 9366 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-229 August 17, 2025 In this edition: * MESAT1 Named a Finalist in Global Satellite Contest * 2025 AMSAT Board of Directors Election Continues * AMSAT Organizations Continue to Challenge AST SpaceMobile Use of Ham Radio Spectrum * Registration Remains Open for AMSAT Symposium, Presentations Invited * NASA Satellite May Be Destroyed On Purpose * Changes to AMSAT-NA TLE Distribution * ARISS News * AMSAT Ambassador Activities * Satellite Shorts From All Over The AMSAT News Service bulletins are a fr ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3516 Issue Time: 2025 Aug 16 0833 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3515 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 4263 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: 3515 Issue Time: 2025 Aug 15 0857 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3514 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 2590 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

SB KEPS @ AMSAT $ORB25227.1 2Line Orbital Elements 25227.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 August 15, 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 with ...Continue Reading

With HamTV becoming active on ISS, orbital elements are now updated twice daily in /www.amsat.org/tle/ at 00:18 and 12:18 UTC. The intention is to have high quality TLE available to accurately calculate doppler shift for the 2.935 GHz downlink. Observations comparing these TLE to those that were caclulated based ephemerides and TLE produced by Johnson Space Center the last time HAMTV was active are desired, write jfitzgerald@amsat.org Assignments to some of the Tevel2 satellites have been updated to match object ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3514 Issue Time: 2025 Aug 14 1211 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3513 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 8356 pfu Comment: The great than 2 MeV electron flux in geosynchronous orbit continues to reach high levels of greater than or equal to 1,000 pfu. Potential Impacts: Satellite systems may experience significant charging resulting in increased r ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3513 Issue Time: 2025 Aug 13 0517 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3512 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 3163 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