Yoon KHU 20101004 1 TRIOCINEMA Agenda KHU Ground Station Introduction Ground Station context diagram Integrated Ground Support SoftwareIGSS UHF RF Chain Ground system configuration ID: 790778
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KHU Ground Station
Nayoung Yoon
KHU, 2010/10/04
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TRIO-CINEMA
Slide2Agenda
KHU Ground Station (Introduction)
Ground Station context diagramIntegrated Ground Support Software(IGSS)
UHF RF ChainGround system configuration
Ground Station computer configuration
Ground Station Equipment
Antenna SettingKHU UHF AntennaUHF Antenna PatternAntenna TestRF Equipment TestTransceiverTransceiver - Helium 100TNC
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Slide3KHU Ground Station
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Slide4Ground Station Context Diagram
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Slide5Integrated Ground Support Software (IGSS)
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Slide6UHF RF Chain
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Slide7UHF Ground system configuration
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Slide8Ground Station computer Configuration
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Slide9Ground Station Equipment
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Tracking Subsystem
Rotator
Rotator Controller
Satellite Tracker S/W (HRD)
RF
Uplink
Subsystem
Antenna
TNC
Transceiver
Telemetry & Commanding Subsystem
GSEOS
RS Decoder
Mission Planning Subsystem
MPS
Attitude Control Subsystem
Attitude Simulator
Ground Computer
Pc
Monitor
UPS
Slide10Ham Radio Deluxe – subprogram
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Slide11Antenna Setting
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Slide12KHU UHF Antenna
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Antenna gain
9.8dBi @ 435 MHz
Azimuth range
450 ˚
Elevation range
180 ˚
Antenna connector
N
Rotator torque
Elevation: 14 kg-m (101 ft-lbs)
Azimuth: 6 kg-m (44 ft-lbs)
Rotator controller
RS-232C voltage levels.
1200 to 9600 baud, 8 data bits,1 stop bit, no parity, Hardware control(CTS port)
Antenna Polarization
LHCP
Rotator Azimuth velocity
58 sec @ 60 Hz
Rotator Elevation velocity
67 sec @ 60 Hz
Operating temperature
-40 to +70 ℃
Slide13Elevation Calculate between Astronomical observatory Dorm and Antenna
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Slide14Elevation Calculate between Astronomical observatory Dorm and Antenna
Condition
650 km, Sun-synchronous, Launched 2012-07-01, Ascending node 00:00
Calculated by STKKHU, 2010/10/04
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Global Statistics
Min Duration
1415
53:55.3
54:11.5
16.234 sec
Max Duration
791
50:37.2
01:37.2
659.973 sec
Mean Duration
518.578 sec
8.642967 min
Total Duration
761273.013 sec
12687.88 min
The number of Total Contact times : 19226
The number of
out of c
ontact
times : 1758 -> 9.14%
Mean Contact time(min) : 8
Mean
out of contact
time(min) : 1min 20sec
Slide15Set UHF Antenna
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Slide16Test Interface
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Slide17UHF Antenna Pattern
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Slide18Antenna Test 1 – Rotator operating time
In manual Max operation time is 5 min
What does it mean exactly?Just operate 5 minWhen rotator has Max torque -> 5 min
Test MethodTracking continuously 3 Amateur satelliteRotator had about 1 min interval
Total rotator operation time : 30 min
Test Result
It works very well. Nothing happened.But KHU has a spare rotator.KHU, 2010/10/04TRIO-CINEMA18
Slide19Antenna Test 2 – Direction
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Rotator moves North 0°, increments to 30°I n a clockwise direction
Check the direction when it comes Counterclockwise from the re-circulated back
Hang the thread at the end of the Antenna for checking antenna’s exactly direction
Slide20Antenna Test 2 - Result
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Direction
North
North
East
East
South East
South
South
West
HRD
0°
30°
60°
90°
120°
150°
180°
210°
240°
Rotator
9.5
N19.5E
N49.5E
N86E
X
E147S
E179S
S206W
X
Direction
West
North West
North
North
East
HRD
270°
300°
330°
360°
400°
430°
450°
Rotator
S269W
W300N
W330N
0
N20E
N50E
N75E
0 °
- 60 °
Can’t because
Observotary
is round shape
Rotator should be
Slide21Antenna test 3 – RF Chain
Test Chain
Handy Transceiver – UHF Antenna – TS2000 TransceiverDistanceAbout 900m
KHU Astronomical Observatory - KHU Front gateResultBoth transceiver work wellFuture plan
Connect Helium 100 with handy transceiver for far-field test
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Slide22Communication Test
Test ChainHelium 100 – Computer – TNC – Transceiver
Result (Berkeley)TNC built in TransceiverUsing GSEOS or the other terminal program – receive data
Result (KHU)TNC transmit dataTransceiver(TS-2000) transmit and receive well
Connect TNC and transceiver : can’t receive data
Problem : connect cable or setting problem with transceiver -> check problem when I come back to KOREA
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Slide23Future plan
TNC – Transceiver – Helium 100 testTNC – Transceiver – UHF Antenna – Handy transceiver – Helium 100 test
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Slide24THANK YOU
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