Journal of Remote Sensing / 2022 / Article / Tab 12

Review Article

An Introduction to the Chinese High-Resolution Earth Observation System: Gaofen-1~7 Civilian Satellites

Table 12

Basic design parameters of the GF-7 laser altimeter [10].

ParameterValue

Number of beams2
Laser wavelength1064 nm
Laser energy100~180 mJ (adjustable)
Emission pulse width4~8 ns
Laser divergence angle30~40 μrad
Receiving telescope aperture600 mm
Pulse repetition frequency3/6 Hz
Echo digitization interval0.5 ns
Laser ranging range450~550 km
Laser ranging accuracy≤0.3 m (slope less than 15°)