Yongho Kim Aug 2, 2011

: My Job

TLM_ReceiverRS decoderGSEOS Nothing.. Interface - Serial line - TCP/IP connection with MPS Functions - CCSDS frame, packet parser - Decode telemetry based on APID - Transmit binary-type Immediate command to FSW Error Handling - CCSDS parser exception - APID decoder exception - CMD generation exception Integration test - Test with FSW for Mode change, start downlink, stop downlink command

 TLM_receiver ◦ Using C# (programming language) ◦ Send telemetry transmitted from satellite to RS decoder ◦ Store telemetry as a file which can be re-loaded if Mission Planning System wants Interface -TCP/IP(done) -Error handling(done) Function -Receive telemetry from S-band RF device using RS422 I/F (done) -Error handling(almost done) -Remote operation(on going) -Store telemetry as a file(done) Error Handling -TCP/IP exception(done) -Remote operation exception(on going) Integration test & Inner functional test -Inner functional test (done) -Integration test with RS decoder (done) - Integration test with s-band RF chain(not performed)

 CCSDS(255, 223) RS(Reed-Solomon) decoder ◦ Use RS coder (verified by satellite company in Korea) based on C# ◦ Decode telemetry and can correct up to 80 bytes for each CCSDS frame(1,275 bytes) Interface -TCP/IP(done) -Error handling(on going) Function - Decode telemetry (done) - Error handling (done) - Remote operation(on going) Error Handling -TCP/IP exception(on going) -Remote operation exception(on going) Integration test & Inner functional test -Inner functional test (done) -Integration test with GSEOS (done) - Integration test with TLM_receiver (done)

 GSEOS(Update EPS, Battery statement in GSEOS) ◦ Parsing EPS, Battery information with calibration equiation based on EPS document ◦ Integration test with FSW using EPS, Battery device is done

 GSEOS(Implementation of delay CMD based on CTM) ◦ Generate delay CMD with timestamp(5 bytes) ◦ Integration test with newest version of FSW is done ◦ Transmitted delay CMD was executed depending on the timestamp ◦ We tested only start downlink, stop downlink delay CMD. Implementation of other delay CMD defined in CTM is matter of time Time Transmit delay CMD With timestamp CMD will be executed The timestamp

 GSEOS(Showing payload data) ◦ STEIN  According to stein data structure, have to draw 32 stripcharts for 32 ch detector  For now, we considerd only 2 ch ◦ MAGIC  Just set up a window for MAGIC science data  When MAGIC module in FPGA is done, we can test with FSW using IIB, MAGIC time Event count Second channel detectorFourth channel detector

 GSEOS(RF test with Jonathan) ◦ GSEOS transmits telecommand through radio equipments ◦ Test was successful and transmitted data was shown in Helium radio configuration program time Attenuators GSEOS Digital Transceiver With TNC Helium Radio Helium radio Configuration program dsPic RF signal Digital (CDI packet) Digital

 Ground Station Manager ◦ Manage whole ground system ◦ Send command(not telecommand) to perform what we want to do ◦ Monitor the status of each sub-system(i.e. TLM_receiver, RS decoder, GSEOS1 and 2) ◦ I/F is done ◦ Connection between subsystem and GS Manager is using private TCP line (not data line)

 Write ground support software CPD document  Write GSEOS CPD document  Write ground station operation document

TLM_ReceiverRS decoderGSEOS Done Interface -TCP/IP connection -Connect with GS Manager Functions -Receive TLM -Save TLM -Transmit TLM Error handling -Connection Exception Integration test -Test with RS decoder Interface -TCP/IP connection Functions -Receive TLM -Decode RS encoded TLM Error handling -none Integration test -Test with GSEOS, TLM_receiver -Test with FPGA’s RS encoder using text file Interface - Serial line - TCP/IP connection with MPS Functions - CCSDS frame, packet parser - Decode telemetry based on APID - Transmit binary-type Immediate command to FSW Error Handling - CCSDS parser exception - APID decoder exception - CMD generation exception Integration test - Test with FSW for Mode change, start downlink, stop downlink command Remains Interface - none Functions -Execute remote CMD from GS Manager -Remote command handling Error handling - Remote control exception Integration test - Test with s-band RF devices Interface - Connect with GS Manager Functions -Execute remote CMD from GS Manager -Remote command handling Error handling -Remote control exception -TCP/IP exception Integration test - Decoding speed test using GSE computer with full load Interface -none Functions -Decode CCSDS frame depending on TM module -Remote command handling Error handling -GS Manager Exception Integration test -Test with FSW using MAG module -Test with FSW using STEIN module -Test CMD generation with MPS