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GEO Bird SV Communication Subsystem Slides for Boeing April 16, 2013 Comms Slides Boeing

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  • GEO BirdSV

    Communication Subsystem Slides for Boeing

    April 16, 2013

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Outline

    1 GEO BirdMain DishPermanent PayloadTT&CC&DH

    Software

    2 SVTT&CC&DHSoftware

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Requirements/Trades

    Description Specifications Source

    Transmit Frequency K-Band(19.500 GHz) RFP/Derived

    Date Rate

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Trades Cont.

    AntennaType

    Gain (typical)(dB)

    HPBW(typical)(degrees)

    Bi-conical 0 to 5 40 to 70

    Horn 5 to 20 5 to 10

    Helix 5 to 20 360

    Patch 0 to 10 60

    Dipole 1 to 3 360

    Mono-Dipole 1 to 6 360

    Parabolic 15 to 65

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Link Budget

    Main Dish DownlinkFrequency (GHz) 19.500

    Data Rate (GB/s)(bps) (1.68)(1.45e10)

    RF Transmit Power (W) 111

    Transmit Antenna Gain (dB) 47.12

    Margin (dB) 3.78

    Polarization RHCP

    FEC 3/4

    Modulation 64-QAM

    Compression Lossless

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Supported DevicesDeLorme InReach,

    SPOT, and SARLINKRFP

    Device Power (W) Frequency(MHz)

    SPOT I & II LLC 7 1610-1620

    ARC SARLINK 5 406.0-406.1

    DeLorme InReach 7 1616-1626

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Link Budget

    SPOT I &II (Uplink)

    SARLINK(Uplink)

    DeLormeInReach(Uplink)

    DeLormeInreach

    (Downlink)

    Frequency(GHz)

    1.615 0.406 1.621 1.621

    Data Rate(bps)

    1045 1045 1045 1045

    RF TransmitPower (W)

    7 5 7 5.1

    TransmitAntenna Gain(dB)

    -8.49 -20.4 -8.45 23.1

    Margin (dB) 4.47 3.01 4.47 3.1

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Transmit Frequency C-Band(4006.47 MHz) RFP/Derived

    Receive Frequency C-Band(6006.47 MHz) RFP/Derived

    Transmit Orientation Transmit in any Derived

    Receive Orientation Receive in any Derived

    Margin 3dB Derived

    Position Accuracy

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Trades

    DORIS versus GPSDORIS: 23 W typical, 30W for 2hr warmupGPS: 10W Mosaic GNSS Receiver

    DORIS: 420mm x 160mm diameter helical antenna, 2kg390 x 370 x 165mm, 18kg electronic support box

    GPS: 10dB gain antenna with 40 degree beamwidth272 x 284 x 92 mm, 3.9kg electronic support box

    Omni versus PatchOmni: Less ESD and easier to manufacturePatch: More ESD and harder to manufacture

    Omni: Less switches, made longer to look around vehicle edgesPatch: More switches, requires extra structure to look around

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Link Budget

    Uplink Downlink

    Frequency (GHz) 6.006 4.006

    Data Rate (bps) 9e4 9e4

    RF Transmit Power (W) 10 5.3

    Transmit Antenna Gain (dB) 39.39 6.78

    Margin (dB) 5.82 3.07

    Polarization RHCP RHCP

    FEC 1/2 1/2

    Modulation BPSK BPSK

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Data Rate2.75 GB/s from

    PayloadsRFP

    Buffer 3 minutes Derived

    InterfaceMIL-STD 1553,RS-422, RS-232,SpaceWire, LVDS

    Derived

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Trades

    Bus Architecture Pros Cons

    Centralized1 Central Computer

    2 Highly reliable

    1 Hard to add nodes

    2 Large wire harnesses

    Ring1 Small wire harnesses

    2 easy to add nodes1 Less reliable

    Federated

    1 Deterministic Datatransmission

    2 Fewer Processors

    3 Failures not ascatastrophic

    1 Specificphysical/electricalinterfaces

    Distributed 1 Highly reliable1 More complex testing

    2 More Processors

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Support Subsystems

    ADCS, Thermal,Power, Propulsion,

    Communications, andRendezvous

    Derived

    Support Fault DetectionMonitoring,

    Identification, andCorrection

    Derived

    Comms Slides Boeing

  • GEO BirdSV

    Main DishPermanent PayloadTT&CC&DHSoftware

    Software Allocation

    Computer SoftwareComponent

    Source Lines ofCode

    TypicalThroughput

    Executive 1000 60

    Communication 4500 20

    Attitude/Orbit SensorProcessing

    3600 30

    Attitude Determination andControl

    27300 133

    Attitude Actuator Processing 2400 6.2

    Rendezvous 19800 51.2

    Fault Detection 11500 22.5

    Other Functions 7700 121

    Total 85600 443.9

    Total w/ FS=1.5 128400 665.85

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Outline

    1 GEO BirdMain DishPermanent PayloadTT&CC&DH

    Software

    2 SVTT&CC&DHSoftware

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Transmit Frequency C-Band(4006.47 MHz) RFP/Derived

    Receive Frequency C-Band(6006.47 MHz) RFP/Derived

    Transmit Orientation Transmit in any Derived

    Receive Orientation Receive in any Derived

    Margin 3dB Derived

    Position Accuracy

  • GEO BirdSV

    TT&CC&DHSoftware

    Trades

    DORIS versus GPSDORIS: 23 W typical, 30W for 2hr warmupGPS: 10W Mosaic GNSS Receiver

    DORIS: 420mm x 160mm diameter helical antenna, 2kg390 x 370 x 165mm, 18kg electronic support box

    GPS: 10dB gain antenna with 40 degree beamwidth272 x 284 x 92 mm, 3.9kg electronic support box

    Omni versus PatchOmni: Less ESD and easier to manufacturePatch: More ESD and harder to manufacture

    Omni: Less switches, made longer to look around vehicle edgesPatch: More switches, requires extra structure to look around

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Link Budget

    Uplink Downlink

    Frequency (GHz) 6.006 4.006

    Data Rate (bps) 9e4 9e4

    RF Transmit Power (W) 10 5.3

    Transmit Antenna Gain (dB) 39.39 6.78

    Margin (dB) 5.82 3.07

    Polarization RHCP RHCP

    FEC 1/2 1/2

    Modulation BPSK BPSK

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Block Diagrams

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Ground Stations

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Data Rate 9 kb/s Derived

    InterfaceMIL-STD 1553,RS-422, RS-232,SpaceWire, LVDS

    Derived

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Trades

    Bus Architecture Pros Cons

    Centralized1 Central Computer

    2 Highly reliable

    1 Hard to add nodes

    2 Large wire harnesses

    Ring1 Small wire harnesses

    2 easy to add nodes1 Less reliable

    Federated

    1 Deterministic Datatransmission

    2 Fewer Processors

    3 Failures not ascatastrophic

    1 Specificphysical/electricalinterfaces

    Distributed 1 Highly reliable1 More complex testing

    2 More Processors

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Block Diagrams

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Block Diagrams Cont.

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Requirements

    Description Specifications Source

    Support Subsystems

    ADCS, Thermal,Power, Propulsion,

    Communications, andRendezvous

    Derived

    Support Fault DetectionMonitoring,

    Identification, andCorrection

    Derived

    Comms Slides Boeing

  • GEO BirdSV

    TT&CC&DHSoftware

    Software Allocation

    Computer SoftwareComponent

    Source Lines ofCode

    TypicalThroughput

    Executive 1000 60

    Communication 4500 20

    Attitude/Orbit SensorProcessing

    3600 30

    Attitude Determination andControl

    27300 133

    Attitude Actuator Processing 1200 1.2

    Rendezvous 4800 31.2

    Fault Detection 11500 22.5

    Other Functions 4700 33.5

    Total 67400 331.4

    Total w/ FS=1.5 101100 497.1

    Comms Slides Boeing

    GEO BirdSV