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

Space Weather Message Code: ALTEF3 Serial Number: 3512 Issue Time: 2025 Aug 12 0803 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3511 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 6326 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: 3511 Issue Time: 2025 Aug 11 0539 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3510 Begin Time: 2025 Aug 10 1145 UTC Yesterday Maximum 2MeV Flux: 3695 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: 3510 Issue Time: 2025 Aug 10 1206 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Aug 10 1145 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

With HamTV becoming active on ISS, orbital elements are now updated twice daily at 00:18 and 12:18 UTC. Assignments to some of the Tevel2 satellites have been updated to match object numbers. The following satellites have been removed from this week's distribution: Foresail-1 NORAD Cat ID 52766 Decayed from orbit on or about 25 June 2025 Joe Fitzgerald KM1P AMSAT Orbital Elements manager Keps mailing list -- keps@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/keps@amsa ...Continue Reading

SB KEPS @ AMSAT $ORB25220.1 2Line Orbital Elements 25220.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 08, 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

AMSAT News ServiceANS-215August 3, 2025In this edition:[*]AMSAT Symposium Call for Papers & Presentations [*]AMSAT-UK Tests FM Transponder for Jovian-1 Satellite [*]AO-123 FM Transponder to Enter Continuous Service [*]HamTV Installed On ISS [*]NOAA-15 and NOAA-19 to be Decommissioned [*]GridMasterMap Satellite Top 100 Rovers August 2025 Rankings____ [*]VUCC Satellite Standings for August 1, 2025 [*]DXCC Satellite Standings for August 1, 2025 [*]Changes to AMSAT TLE Distribution for August 1, 2025 [*]ARISS News [ ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3509 Issue Time: 2025 Aug 01 1331 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3508 Begin Time: 2025 Jul 31 1635 UTC Yesterday Maximum 2MeV Flux: 1104 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