MARMOTSat with 10m downlink

MARMOTSat is a 3U CubeSat currently under development with an Amateur radio focus. It is slated to launch NET June 2026 on SpaceX Transporter-17.

Radio Frequencies

MARMOTSat will use the following frequencies for TT&C and Amateur experiments:

Amateur Experiment	Frequency
TT&C up- and downlink	436.125 MHz
Digipeater up- and downlink	145.875 MHz
CW telemetry beacon downlink	145.875 MHz
CW telemetry beacon downlink	29.410 MHz
DVB-S2 digital video beacon	29.410 MHz
Linear frequency modulation downlink	29.410 MHz

Frequencies in each band are shared. The Amateur experiments which use the same frequencies are mutually exclusive and will never be run at the same time.

Amateur Payload Overview

The Amateur payload is available to be used by all interested and propely licensed parties, gobally. The Amateur payload is the debut of the Modular CubeSat Radio, featuring the RF modules necessary to facilitate MARMOTSat’s Amateur radio and ionospheric science experiments. The MCR configuration for this mission is the core consisting of the SDR, computer and camera, as well as HF and VHF RF front ends, and wire antennas:

• HF antenna: Base loaded half-wave tape measure whip.
• VHF antenna: Half wave tape measure dipole.
• Radio: Low power HF SDR based on the Hermes Lite 2. Design here.
• HF RF front end: Two chain push/pull HF amplifier for 10m. Design here.
• VHF RF front end: HF to VHF transverter. Design here.
• Camera: Off the shelf serial camera module with resolution worse than <7.5m/pix.

Full information at: https://www.propagationlab.ca/satellite/