For radio amateurs

Aalto ground station

All the satellites from Aalto University are operated from the Aalto Ground Station, located on the roof of a campus building on Otaniemi.

Callsign: OH2AGS

Frequency capabilities: VHF, UHF and S-band

Station supervisor: Vesa Korhonen (OH2CNC)

Active Satellites:

Suomi100-satellite

Suomi100 was launched with Falcon 9 December 3rd, 2018. The first signal was received at Aalto ground station the day after on the first overpass.

Suomi100 transmits a beacon signal every 60 seconds. Beacon contains basic telemetry from electrical power system, communications radio and on-board computer.

TLE catalog name: SUOMI100

Frequency: 437.775 MHz

Bandwidth: 14.4 kHz

Max. TX power: +30 dBm

Modulation: GMSK, deviation 4.8 kHz

Data/symbol rate: 9600 bit/s

Future Missions:

These satellites are currently being designed and built at Aalto, so all information is subject to change.

Foresail-1 Prime

HAM radio information for contacting Foresail-1 satellite (OH2FS1)

• The satellite is planned to be launch Mid 2025.
• More information: https://foresail.github.io/

UHF Telecommand uplink / Telemetry downlink / CW beacon

• Frequency: 437.125 MHz
• Bandwidth: 20 kHz
• Max TX power: 1.3 W (dBm 31.1)
• Modulation: GMSK

Foresail-2

HAM radio information of Foresail-2 satellite (OH2FS2 (TBC))

• TBD

Aalto-3

HAM radio information of Aalto-3 satellite (OH2A3S (TBC))

• TBD

Completed Missions:

These satellites have deorbited already or are inactive, the information is presented for reference only.

Aalto-1 (Deorbited)

HAM radio information for contacting Aalto-1 satellite (OH2A1S)

• The satellite was launched 23 June 2017 03:59 GMT and deorbited on 01 September 2024.
• https://www.celestrak.com/NORAD/elements/cubesat.txt

UHF Telecommand uplink / Telemetry downlink / CW beacon

• Frequency: 437.220 MHz
• Bandwidth: 13 kHz
• Max TX power: 1.2 W (dBm 30.8)
• Modulation: GFSK, deviation 3 kHz
• 6-second long beacon every 180 s CW beacon followed by an AX.25 data message

Aalto-2 (Deorbited)

HAM radio information of Aalto-2 satellite (ON01FI)

• The satellite was launched with 18.4.2017 with Atlas V rocket and deployed from International Space Station on 25 May 2017 and deorbited on 06 February 2019.

UHF Telecommand uplink / Telemetry downlink / CW beacon

• Center frequency: 437.335 MHz
• Max TX power: 1.2 W (dBm 30.8)
• CW beacon every 60 s
  • Information contained in CW beacon:
    • Callsign: AALTO2

Foresail-1 (Inactive)

HAM radio information of Foresail-1 satellite (OH2FS1)

• The satellite was launched with 26 May 2022. It is currently not operational.

UHF Telecommand uplink / Telemetry downlink / CW beacon

• Center frequency: 437.125 MHz
• Max TX power: 1.2 W (dBm 30.8)

More information:

Station supervisor Vesa Korhonen ([email protected])

For information on a specific satellite, refer to the webpage of the satellite mission.