Diploma action: “20 years of active amateur radiocommunication service on the International Space Station”
Additional stations outside Poland:
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ARISS Ground Station in Italy: IK1SLD.
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F4KLX – the radio club of the ISS Fan Club. Any member of the ISS FC association can activate the callssign, previously writing an email and then sending the QSO’s logs in ADIF. f4klx@issfanclub.eu
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TM20ISS20th Anniversary ARISS French “Special call” Commemorative Station