Note regarding CEVROSAT1 Provisional ID 98526: Resource constraints at USSF 18SDS are evidently contining to prevent generation of TLE for this satellite. The element set is unusally poor, expect the satellite to pass a minute or more away from predictions. This element set, provided by the SatNOGS network and likely based on orbital insertion data from the launch provider, is being used to successfully receive data from the spacecraft despite innacuracies. The following satellites have been added to this week's ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 503 Issue Time: 2025 Dec 04 0250 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Dec 04 0248 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: 3570 Issue Time: 2025 Dec 03 0706 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3569 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 8535 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: 3569 Issue Time: 2025 Dec 02 0501 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3568 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 8521 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: 3568 Issue Time: 2025 Dec 01 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3567 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 8310 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: 203 Issue Time: 2025 Dec 01 0314 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2025 Dec 01 0227 UTC Maximum Time: 2025 Dec 01 0249 UTC End Time: 2025 Dec 01 0305 UTC X-ray Class: X1.9 Location: N22E85 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, strongest at the sub-sola ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 502 Issue Time: 2025 Dec 01 0241 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 Dec 01 0240 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: 3567 Issue Time: 2025 Nov 30 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3566 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 23005 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 upda ...Continue Reading

AMSAT News Service ANS-334 November 30, 2025 *In this edition:* Registration is open for the 2025–2026 European Astro Pi Challenge Optical Communications Systems Test the Limits of FCC Authority A Protocol Extension for GOLF Operations REALOP CubeSat to Test Hard Drives for ADC System Changes to AMSAT-NA TLE Distribution for [date] ARISS News AMSAT Ambassador Activities Satellite Shorts The AMSAT(R) News Service bulletins are a free, weekly news and information service of AMSAT, the Radio Amateur Sa ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3566 Issue Time: 2025 Nov 29 0500 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3565 Begin Time: 2025 Nov 25 1450 UTC Yesterday Maximum 2MeV Flux: 14759 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 upda ...Continue Reading