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MarconISSta Offering One Last Chance to Test UHF Antennas:

from The ARRL Letter on February 7, 2019
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MarconISSta Offering One Last Chance to Test UHF Antennas:

The MarconISSta https://marconissta.com/ experiment on the Amateur Radio on the International Space Station (ARISS http://www.ariss.org/) Columbus module station will be decommissioned on Saturday, February 9, about 3 weeks earlier than anticipated. MarconISSta is a radio spectrum analyzer on the ISS that monitors parts of the RF spectrum in VHF, UHF, L, and S bands in order to analyze current use and availability for satellite communication.

The project is conducted by a team of researchers and students from Technische Universitšt Berlin, with support of the German Aerospace Center, the European Space Agency, ARISS, and other partners. MarconISSta engineers are inviting anyone with a UHF antenna who can generate at least 30 dBW EIRP to attempt transmitting https://marconissta.com/2019/02/05/urgent-call-all-power-to-the-iss/ to the ISS. MarconISSta will record and publish all transmissions copied. Successful tests have been carried out with 50 W and 15 dBi antenna gain.

Whenever the ISS is within range, transmit between 435 and 438 MHz, avoiding 435.95 MHz in Europe and 436.5 MHz (the receiver's center frequency). Transmit a continuous carrier and do not employ Doppler shift correction. Read more http://www.arrl.org/news/marconissta-offering-one-last-chance-to-test-uhf-antennas.

Source:

The ARRL Letter

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