Derivation of 1.064 μm normal albedos on the C-type asteroid Ryugu from laser pulse intensity measurement of the Hayabusa2 LIDAR

Earth, Planets and Space

Table 1 Specification of the Hayabusa2 LIDAR (Mizuno et al. 2017; Yamada et al. 2017)

Parameters	Values
Ranging range	30 m–25 km (NEAR system: below 1 km, FAR system: above 1 km)
Transmitted laser pulse energy	14.6 ± 1.1 mJ
Wavelength	1.064 μm
Half the bandwidth of laser pulse	5.6 ± 0.23 ns
The view angle of the FAR telescope	1.5 mrad
Full beam divergence of the transmitter	2.4 mrad
Area for laser receiving of the FAR telescope	0.0095 m²
Transmissivity of the optical system	0.678
The responsivity of the APD for low level	50 ± 4.5 kV/W
The responsivity of the APD for middle level	166 ± 28 kV/W
The responsivity of the APD for high level	503 ± 83 kV/W
Maximum data sampling	1.0 Hz