ARLA/CLUSTER: Podemos voltar a ter satélites para amador (CubeSat) com transponders em HF

[João Costa > CT1FBF]

HFsat will have 21 to 29 MHz transponder

US Naval Academy students are planning an amateur radio CubeSat
carrying an HF transponder as well as 2m APRS

They are working with Bill N6GHZ on the HF transponder card which will
provide a bandwidth of 30 kHz, the frequencies are currently 21.4 MHz
uplink and 29.42 MHz downlink. Doppler shift will be reduced to less
than 2 Hz per second by using an inverting transponder.

The satellite will be gravity gradient stabilized by its long full
size 10 meter band halfwave HF dipole antenna with tip masses

Read more about HFsat at
http://aprs.org/hfsat.html

IARU satellite frequency coordination page
http://www.amsat.org.uk/iaru/