16.4 Design Principles
529
The specifications of descent camera included: band range, normal imaging distance,
effective pixels number, Field of View (FoV), frame frequency, quantitative value,
MTF (Modulation Transfer Function), signal to noise ratio, maximum data rate, data
compression ratio, power consumption and mass.
The specifications of morphology camera included: band range, color, imaging
modes, normal imaging distance, effective pixels number, FoV, frame frequency,
quantitative value, MTF, signal to noise ratio, maximum data rate, data compression
ratio, power consumption and mass.
The specifications of LUT included: band range, FoV, observation limitation,
observation uncertainty, effective pixels number, image spot energy concentration,
quantitative value, maximum data rate, data compression ratio, power consumption
and mass.
The specifications of extreme ultraviolet cameras were central frequency, bandwidth, FoV, angular resolution, time for single measurement, observed intensity
range, sensitivity, maximum data rate, power consumption and mass.
16.4.2 Engineering Instrument Configuration
According to the requirements for engineering exploration, current instrument technology, system resource constraints and target features, after proposal and deliberately analyzing, it was determined that there would be engineering instruments
on the lunar lander as follows. Three monitoring cameras were installed on the top
plate of the lunar lander for imaging the lunar rover status of locking/unlocking and
deployment. One lunar dust detector was installed for measurement of lunar dust
accumulation, which had two heads, one was solar cell detector on the top plate
of the lunar lander and another was the stick quartz crystal microbalance (SQCM)
in a module of the lunar lander which had a cover to be opened and closed. The
engineering instruments on the Chang’E-3 lunar lander are listed in the Table 16.6.
1. Functions of Engineering Instruments
The function of monitoring camera A was to monitor the lunar rover
locking/unlocking status (the front wheel of the lunar rover) and movement to the
transfer mechanism. The function of monitoring camera B was to monitor the lunar
rover locking/unlocking status (the rear wheel of the lunar rover), release status of
Table 16.6 Engineering instruments configuration
Engineering objective
Engineering instrument configuration
Engineering instrument
Quantity
To monitor the deployment of the lunar rover on the
lunar lander
Monitoring camera A, B, C 3
To measure lunar dust accumulation
Lunar dust detector
1
529
The specifications of descent camera included: band range, normal imaging distance,
effective pixels number, Field of View (FoV), frame frequency, quantitative value,
MTF (Modulation Transfer Function), signal to noise ratio, maximum data rate, data
compression ratio, power consumption and mass.
The specifications of morphology camera included: band range, color, imaging
modes, normal imaging distance, effective pixels number, FoV, frame frequency,
quantitative value, MTF, signal to noise ratio, maximum data rate, data compression
ratio, power consumption and mass.
The specifications of LUT included: band range, FoV, observation limitation,
observation uncertainty, effective pixels number, image spot energy concentration,
quantitative value, maximum data rate, data compression ratio, power consumption
and mass.
The specifications of extreme ultraviolet cameras were central frequency, bandwidth, FoV, angular resolution, time for single measurement, observed intensity
range, sensitivity, maximum data rate, power consumption and mass.
16.4.2 Engineering Instrument Configuration
According to the requirements for engineering exploration, current instrument technology, system resource constraints and target features, after proposal and deliberately analyzing, it was determined that there would be engineering instruments
on the lunar lander as follows. Three monitoring cameras were installed on the top
plate of the lunar lander for imaging the lunar rover status of locking/unlocking and
deployment. One lunar dust detector was installed for measurement of lunar dust
accumulation, which had two heads, one was solar cell detector on the top plate
of the lunar lander and another was the stick quartz crystal microbalance (SQCM)
in a module of the lunar lander which had a cover to be opened and closed. The
engineering instruments on the Chang’E-3 lunar lander are listed in the Table 16.6.
1. Functions of Engineering Instruments
The function of monitoring camera A was to monitor the lunar rover
locking/unlocking status (the front wheel of the lunar rover) and movement to the
transfer mechanism. The function of monitoring camera B was to monitor the lunar
rover locking/unlocking status (the rear wheel of the lunar rover), release status of
Table 16.6 Engineering instruments configuration
Engineering objective
Engineering instrument configuration
Engineering instrument
Quantity
To monitor the deployment of the lunar rover on the
lunar lander
Monitoring camera A, B, C 3
To measure lunar dust accumulation
Lunar dust detector
1