  In this work, the performance of SensL MicroFC-60035 SiPM devices was studied
during a 1460-day mission in Low Earth Orbit (LEO) using the LabOSat-01
characterization payload. Two of these platforms, carrying two SiPMs each, were
integrated into the \~NuSat-7 satellite (COSPAR-ID: 2020-003B). Analysis
revealed that these SiPMs experienced an increase in dark current over time due
to damage from trapped and solar proton radiation. The total ionizing dose
received by the payload and the SiPMs was measured using p-MOSFET dosimeters,
with a resulting value of 5 Gy, or a 1 MeV neutron equivalent fluence of
$\phi_n = 5 \cdot 10^9$ n/cm$^2$. The dark current was observed to increase up
to 500 times. Parameters such as Gain and Photon Detection Efficiency remained
unchanged throughout the mission. These findings align with previous
performance reports involving different SiPMs irradiated with various particles
and energies.
