14.6 Electrical Testing Methodology
483
Hibernation
Process
Awakening
Process
Critical curve
U
I
O
Awakening Load
Characteristics
Awakening
point
Fig. 14.9 Power Supply Curve of solar cell simulator in function test of hibernation and awakening
lunar night, the gradual reduce of ground power supply would make the lunar lander
transfer to hibernation status. During transition process from lunar night to lunar
day, the gradual increasing of ground power supply would awaken the lunar lander
autonomously.
14.7 Summary
The development and the successful applications of electrical test technology of
the lunar lander could promote the development of spacecraft electrical test technology furthermore, and accumulated helpful experience for development and test
of future deep space probes. The complexity and innovation of future deep space
probes will introduce new topics for electrical test technology and promote progress
of test technology to great extent. Deep space telecommunication is extending to
Ka and higher bands [7], which makes that the ground test system shall adapt to
the multi-band, multi-system and multi-channel test requirements. The application
of channel coding technologies, such as Turbo code and Low Density Parity Check
(LDPC) code, requires that the corresponding encoding and decoding functions shall
be developed for the test equipment. Some new requirements for ground test equipment and test methods are put forwarded due to the characteristics of long distance,
low signal-to-noise ratio and low bit rate in deep space telecommunication. When
the packet telemetry and telecommand system is applied to the data management
483
Hibernation
Process
Awakening
Process
Critical curve
U
I
O
Awakening Load
Characteristics
Awakening
point
Fig. 14.9 Power Supply Curve of solar cell simulator in function test of hibernation and awakening
lunar night, the gradual reduce of ground power supply would make the lunar lander
transfer to hibernation status. During transition process from lunar night to lunar
day, the gradual increasing of ground power supply would awaken the lunar lander
autonomously.
14.7 Summary
The development and the successful applications of electrical test technology of
the lunar lander could promote the development of spacecraft electrical test technology furthermore, and accumulated helpful experience for development and test
of future deep space probes. The complexity and innovation of future deep space
probes will introduce new topics for electrical test technology and promote progress
of test technology to great extent. Deep space telecommunication is extending to
Ka and higher bands [7], which makes that the ground test system shall adapt to
the multi-band, multi-system and multi-channel test requirements. The application
of channel coding technologies, such as Turbo code and Low Density Parity Check
(LDPC) code, requires that the corresponding encoding and decoding functions shall
be developed for the test equipment. Some new requirements for ground test equipment and test methods are put forwarded due to the characteristics of long distance,
low signal-to-noise ratio and low bit rate in deep space telecommunication. When
the packet telemetry and telecommand system is applied to the data management