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Science Instruments
Operations
SIM
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The focal plane instruments are mounted on the Science
Instrument Module (SIM). The SIM contains mechanisms to move the
science instruments in and out of the focal plane, insulation
for thermal control, and electronics to control the operation of
the science instruments via the communication, command and data
management systems of the spacecraft.
The science instruments are controlled by commands transmitted
from the Operations Control Center in Cambridge, Massachusetts.
A preplanned sequence of observations is uplinked to Chandra and
stored in the onboard computer for later execution.
Data collected by observations with Chandra are stored on a
recorder for later transmission to the ground every eight hours
during regularly scheduled Deep Space network contacts. The data
is then transmitted to the Jet Propulsion Laboratory and then to
Operations Control at the Chandra X-ray Center (CXC) in
Cambridge, MA for
processing and analysis by scientists.
More Chandra Specifications [pdf | html]
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