Sharing Knowledge SCA Telkomsat_HOP ACS 1

What is HOP ACS 1 procedure?

• Alternate ACE Checkout

• Alternate STR Checkout

• Primary Processor Checkout

• Alternate Bus Adapter Checkout

Below is the correct statement of the recommended HOP ACS 1 schedule, except

• should be executed every 2 years

• Can be Called from COP

• Should be Performed after equinox season

• Should be Performed during equinox season

Below is the list of procedures that call HOP ACS 1, except

• . COP ACS13, Anomalous Gyro Behavior

• . COP ACS3, ACS FDIR Monitor Trip

• HOP ACS 6, Alternate STR Checkout

• . HOP ACS5, Sun Sensor Health Monitoring

During nominal MPSAT condition, based on the chart, what step should we choose after entering step 2.1?

• Go to Step 2.5

• Go to Step 2.2

• Go to Step 2.7

• Go to Step 1

Why do we have to change the swap ACE configuration on the primary processor to be the same as the active ACE during execution of this procedure? All the statements below here is correct except

• To avoid the possibility of two processors being configured as Bus Controllers to the same ACE in the event of an FDIR trip

• To allow a predictable path to elevate FDIR to a processor swap

• To prevent two processors attempting to communicate to the same ACE as Bus Controllers

• To Collect data from primary ACE

Below are the list of ACE trays that are monitored by the ACE MBUS Global and Individual Monitors, except

• Sensors

• Thrusters

• Reaction Wheels

• MPS and LSE Trays

During the step where the operator should Plot RW Data for each RW for 5 mins from both processors, these telemetries should be monitored by Operator except

• RW ON/OFF Status

• RW Motor Current

• RW Motor Power

• RW Averaged Tach

During the check of the He and MST LV polarity statuses from both processors, the operator should expect the CLOSE status from these equipments except

• MST Ox Latch Valve

• Fuel HE Latch Valve

• MST Fuel Latch Valve

• 22N Thruster Latch Valve

During the execution of HOP ACS 1 on November 25th, on step 9.7, what action did SCA decide to take before going to Mbus configuration step?

• Review remote absolute address using memory management tools

• Assumed there are non-zero values in the addresses then continue to step 999

• Assumed there are no non-zero values in the addresses then continue to 9A

• Assumed there are non-zero values in the addresses then continue to 9.9 and 9.10 to cycle the bus adapter mode

All of these statements are true about MPSAT Attitude Control Electronics (ACE), except

• Each stack contains a Bus Interface Tray (BIU) and three trays necessary to interface with the attitude control sensors and actuators

• ACE is a unit connecting the sensors and actuator in ACS subsystem

• ACE is configured as a primary stack and a redundant stack

• Normally, only the primary ACE is powered and the redundant, or standby, ACE is unpowered (off).