Radio Link Budgets of VR2Sat

 

VR2Sat is the amateur radio payload of the Hong Kong Popular Science Satellite, proposed by the Textile Institute American Chamber of Commerce Woo Hon Fai Secondary School Amateur Radio Club (VR2XHF), and is planned to be deployed into a 385 km, 41.5-degree inclination orbit in Q3 2026.

  Data Unit
Frequency 145.9 MHz
Distance 1399.3 km
Modulation Type FM -
TX Power 7 dBW
TX Gain 5 dBi
Ant Polarization Loss 3 dB
Free Space Loss 138.6 dB
Other Path Loss 1 dB
RX Gain -6 dBi
RX Input Level -106.6 dBm
Sensitivity -121 dBm
Margin 14.4 dB
  Data Unit
Frequency 437 MHz
Distance 1399.3 km
Modulation Type FM -
TX Power 0 dBW
TX Gain -6 dBi
Ant Polarization Loss 3 dB
Free Space Loss 148.2 dB
Other Path Loss 1 dB
RX Gain 10 dBi
RX Input Level -118.2 dBm
Sensitivity -121 dBm
Margin 2.8 dB