Table 1. LEO-DOS instrument specification

Parameters		PD	NS
Performance	Properties	Proton > 40 MeVElectron > 3 MeV	Proton > 35 MeVElectron > 2.5 MeV
		Time resolved LET : 0.3–700 keV/μm	Energy range : 2–8 MeV
		- Flux (counts/sec/cm2)- Absorbed dose rate (D, μGy h–1)- Dose equivalent rate (H, μSv h–1)	- Fast neutron & gamma spectrum- Flux (counts/sec)- Absorbed dose rate (D, μGy h–1)- Equivalent dose rate (H, μSv h–1)
	Geometric factor	25.13 cm2 sr (2 cm2)	214.90 cm2 sr (17.10 cm2)
	FOV	Omni-direction	Omni-direction
	Shield	1.8 g cm–2	1.8 g cm–2
System	Dimension	190 (W) × 85 (D) × 144 (H) mm3
	Mass	1.7 kg
	Power	5.5 W
	Interface	CAN
	Transmission	350 Mb/day

LEO-DOS, low Earth orbit space radiation dosimeter; PD, particle dosimeter; NS, neutron spectrometer; LET, linear energy transfer; FOV, field of view.