FEES2 Satellites

Satellite FEES2
Spacecraft type CubeSat
Units or mass 0.3U
Entity name Apogeo Space
Institution Company
Entity type Commercial
Nation Italy
Launch brokerer Momentus
Partners Polytechnic University of Milan

Demonstrate various technologies including Iridium modem and camera.


Enhanced FEES variant with an additional radio to test the IoT data relay, as a precursor of the constellation. These two FEES satellites will pave the way for future constellations of Picosatellites devoted to the retrieval of IoT data from ground, starting with a first Cluster mission in 2022.

The objectives are:

  1. The satellite will provide a beacon and telemetry data for which amateur satellite users will be able to receive.
  2. Perform a data relay, from the VHF band (reception) to the UHF band (transmission to ground). This will be opened to the radio amateur community.
  3. Test the capabilities of reusable flight platform, which consists of TMTC module, onboard computer, Power system, ADCS (Attitude Determination and Control System), Antenna deployment system, radiation monitoring and payloads.
  4. Test the capability to transmit TMTC command through the Iridium satellite network (non activated at mission startup, granting of permission still pending Astrophysical community and Iridium permissions)
  5. Test LoRa transmission protocol to increase link budget.
  6. Detect the TID thanks to a dedicated radiation monitoring experiment.
  7. Take and transmit picture of the ground. The satellite will have a VHF and UHF downlink in the 144-146 MHz and 435-438 MHz band, two UHF uplink in the 435-438 MHz band and in the 1260-1270 MHz band, one VHF uplink in the 144-146MHz.
Sources [1] [2] [3] [4] [5] [6]
Photo sources [1] [2]
Keywords Globalstar or Iridium or Inmarsat

Related Spacecraft

Satellite Status Rocket Launch date Orbit
FEES (Flexible Experimental Embedded Satellite) Reentry 2024-02-14. Was operational (Public website with beacons as of 2021-08-04) Sojuz, (UniSat-7) 2021-03-22 550 km, 97.6 deg
FEES2 (Flexible Experimental Embedded Satellite, FEES-2) Reentry 2022-11-16. Was operational? (Have not found direct confirmation as of 2022-07-23) Falcon 9, (CRS-24) 2021-12-21 400 km, 51.6 deg, ISS

Last modified: 2024-05-29

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