Space Weather Message Code: ALTXMF Serial Number: 490 Issue Time: 2025 Jun 19 2348 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Jun 19 2347 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: 195 Issue Time: 2025 Jun 17 2204 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2025 Jun 17 2138 UTC Maximum Time: 2025 Jun 17 2149 UTC End Time: 2025 Jun 17 2154 UTC X-ray Class: X1.2 Optical Class: 2b Location: N18W10 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: 489 Issue Time: 2025 Jun 17 2150 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Jun 17 2147 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: 3480 Issue Time: 2025 Jun 17 1350 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Jun 17 1340 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: ALTXMF Serial Number: 488 Issue Time: 2025 Jun 16 0938 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Jun 16 0935 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: ALTXMF Serial Number: 487 Issue Time: 2025 Jun 15 1805 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Jun 15 1800 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: ALTXMF Serial Number: 487 Issue Time: 2025 Jun 15 1803 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Jun 15 1800 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

*In this edition:* Hotel Reservations for 43rd AMSAT Space Symposium and Annual Meeting Now Available Hard Copy Getting Started in Amateur Satellites Now Available Bankston Introduces Hamvention 2025 AMSAT Forum Burns Fisher – The Legacy of AMSAT Flight Software SkyRoof - A Specialized Satellite Tracking Program for SDR's VUCC Satellite Standing June 2025 DXCC Satellite Standing June 2025 Changes to AMSAT-NA TLE Distribution for June 13, 2025 ARISS News AMSAT Ambassador Activities Satellite Shorts Fro ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 486 Issue Time: 2025 Jun 14 2259 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Jun 14 2258 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

SB KEPS @ AMSAT $ORB25164.1 2Line Orbital Elements 25164.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 June 13, 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 withou ...Continue Reading