TRIO-CINEMA 1 UCB, 2/08/2010 FSW & Operations Winter Summary Seyoung Yoon KHU EE Team

TRIO-CINEMA 2 UCB, 2/08/2010 Page  2 Agenda Operations –Operation Scenario –Contact Sequence –Power Status –Mission Operation Center Flight Software –Execute Module –Command Module –Sun-sensor Module –SPI-to-UART converter using another dsPIC

TRIO-CINEMA 3 UCB, 2/08/2010 Page  3 Operation Mode HSKSTETXSTEMAGSTETXSTE HSKSTETXSTE TXSTE TXSTEMAGSTETXSTE CMDSTETXSTE TXSTE HSKSTETXSTEMAGSTETXSTE TXSTE TXSTE TXSTEMAGSTETXSTE TXSTE TXSTE Safe mode All instruments are not available. Science mode All instruments are available exce pt boom and antenna actuators an d torque coils. ACS mode STEIN instruments are not availa ble and MAGIC operation mode i s switched to ACS mode. Torque coils are available. Engineering mode All instruments are available. OBC, EPS, BATT, RX and Sun-sens ors are always turned on.

TRIO-CINEMA 4 UCB, 2/08/2010 Page  4 Operation Scenario Launch –Launched and separated from the launch vehicle Startup –Power-on, initializes the FSW, deploys the UHF antenna, waits for contact the ground station Stabilization –Contacts the ground station, deploys the boom, calibrates the MAGIC, ACS acquisition mode, ACS procession mode Science Operation –Download mode, Observation mode, ACS mode, Safe mode, Fault recovery Mission Termination

TRIO-CINEMA 5 UCB, 2/08/2010 Page  5 Operation Scenario 1.0 Launch Process 2.0 Startup Process 3.0 Stabilization Process

TRIO-CINEMA 6 UCB, 2/08/2010 Page  6 Operation Scenario 4.0 Science Operations

TRIO-CINEMA 7 UCB, 2/08/2010 Page  7 Contact Sequence Flow Sequence of contact with the Ground Station

TRIO-CINEMA 8 UCB, 2/08/2010 Page  8 Power Status(1/2) TimeOperational Processes C&DHTSEPSACSMAGICSTEIN *On Board Computer Instrument Interface Board *Helium100 UHF Receiver Emhiser S-band Transmitter *Clydespace 3U-EPS *Clydespace 3U-BATT *TASC Solar Array Low Voltage Power Supply *Sun-sensor Magnetic Torque Coils ACS mode Science A, A’, B mode Gradiometer mode STEIN detector & electronics High Voltage Power Supply Deflector Attenuator 1.0 Launch Process 1.1 Separation from launch vehicle √√√√√√ 1.2 Acquisition of orbit parameters √√√√√√ 2.0 Startup Process 2.1 Power on √√√√√√ 2.2 Initialization FSW √√√√√√ 2.3 Deploy the UHF antenna √√√√√√√√√ 3.0 Stabilization Process 3.1 Contact the ground station √√√√√√√√√√ 3.2 Deploy the mag boom √√√√√√√√√ 3.3 MAGIC calibration √√√√√√√√√√

TRIO-CINEMA 9 UCB, 2/08/2010 Page  9 Power Status(2/2) TimeOperational Processes C&DHTSEPSACSMAGICSTEIN *On Board Computer Instrument Interface Board *Helium100 UHF Receiver Emhiser S-band Transmitter *Clydespace 3U-EPS *Clydespace 3U-BATT *TASC Solar Array Low Voltage Power Supply *Sun-sensor Magnetic Torque Coils ACS mode Science A, A’, B mode Gradiometer mode STEIN detector & electronics High Voltage Power Supply Deflector Attenuator 3.4 ACS acquisition mode √√√√√√√√√√ 3.5 ACS procession mode √√√√√√√√√√ 4.0 Science Operation Process 4.1 Safe mode √√√√√√ 4.2 Observation mode √√√√√√√√√√√√√ 4.3 Download mode √√√√√√√√√√√√√√ 4.4 ACS mode √√√√√√√√√√ 4.5 Fault Recovery mode √√√√√√ 5.0 Mission Termination

TRIO-CINEMA 10 UCB, 2/08/2010 Page  10 Mission Operation Center We need more function or system to operate the mission automatically. Integrated Ground Support Software (IGSS) Attitude Simulator (Matlab/simulink) CINEMA Emulator GSEOS Mission Planning System Satellite Tracker (Orbitron?) Orbit Simulator (STK or Orbitron or hand-made?) Radio System CINEMA Radio Not determinedIn progress

TRIO-CINEMA 11 UCB, 2/08/2010 Page  11 Mission Operation Center Radio communication system –UHF/S-band antennae, transceivers, TNCs, RS decoder(TBD) Satellite Tracking System –Tracking software for antenna control (Orbitron in KHU), antenna rotator and controller. GSEOS - Communication software for command and telemetry Mission Planning System –Pass scheduling from the Orbitron or STK or hand-made –Observation planning –Generating the command for the spacecraft Simulator for attitude control (Matlab/Simulink) –It conducts the simulation for attitude control. –For verification, it executes the command with the CINEMA emulator. CINEMA emulator –It consists of the development board for OBC and simulator or EM for other instruments. Integrated Ground Support Software –It shall conduct interfacing between other ground software.

TRIO-CINEMA 12 UCB, 2/08/2010 Page  12 Flight Software EXEC Module –Initialize the functions of each FSW modules –Execute the command(now only immediately command) from CMD module –Organized the structure of function CMD Module (Sameet’s) –Added some code to parse the CDI packet from the Helium radio IDENTIFIERBinaryGSECommand Description MODE_SWITCH xxxxxxMMYesSwitch FSW Mode INIT_DLINK xxxxxxxxYesStart downlink STOP_DLINK xxxxxxxxYesStop downlink

TRIO-CINEMA 13 UCB, 2/08/2010 Page  13 Flight Software Sun-sensor Module –Modified for new sun-sensor circuit –Sun-sensor data is updated when the HSK task is called and when the ACS asks it. –Return the sun-vectors(x, y, z) and spin rate(rad/sec) –Have two problem that Earth’s Albedo and detecting the spin direction –Direction problem can be solved by getting the direction from the ACS SPI-to-UART Converter using another dsPIC –It’s available to check the data from dsPIC or IIB –Current model has fixed clock and data length –Should be updated to get more convenient interface

TRIO-CINEMA 14 UCB, 2/08/2010 Page  14 Future Works Integrate the FSW –Add the commands from the CTM.xls –Add the functions for early orbit Sun-sensor –Find the solution for two problems –Test with real hardware SPI-to-UART converter –Update to control the option such as clock speed and number of received bytes.

TRIO-CINEMA 15 UCB, 2/08/2010 Kyung Hee University / School of Space Research