Comms slides boeing

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


Requirements/Trades

Description Specifications Source

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

Date Rate <1.7 GB/s RPF/Derived

Ground Antenna 3m in Colorado RFP

Margin 3 dB Derived

Gimbal 2-D Derived

0.5 m 1.0 m 3.0 m

Gain (dB) 40 46.43 55.97

Power (W) 1159.87 292.47 35.61

Beamwidth(degrees)

1.56 0.78 0.26

Comms Slides Boeing

GEO BirdSV


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 <1 to 10

Comms Slides Boeing

GEO BirdSV


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


Block Diagrams

Comms Slides Boeing

GEO BirdSV


Block Diagrams Cont.

Comms Slides Boeing

GEO BirdSV


Requirements


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


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


Block Diagrams

Comms Slides Boeing

GEO BirdSV



Comms Slides Boeing

GEO BirdSV


Requirements


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 <1km Derived

Nominal Operations GroundAntenna

2m Colorado RFP

Transit Ground Antenna (List Them) Derived

Comms Slides Boeing

GEO BirdSV


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


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


Block Diagrams

Comms Slides Boeing

GEO BirdSV



Comms Slides Boeing

GEO BirdSV


Requirements


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


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


Block Diagrams

Comms Slides Boeing

GEO BirdSV



Comms Slides Boeing

GEO BirdSV


Requirements


Support Subsystems

ADCS, Thermal,Power, Propulsion,

Communications, andRendezvous

Derived

Support Fault DetectionMonitoring,

Identification, andCorrection

Derived

Comms Slides Boeing

GEO BirdSV


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


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 <1km Derived

Nominal Operations GroundAntenna

2m Colorado RFP

Transit Ground Antenna (List Them) Derived

Comms Slides Boeing

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


Comms Slides Boeing

GEO BirdSV

TT&CC&DHSoftware

Ground Stations

Comms Slides Boeing

GEO BirdSV

TT&CC&DHSoftware

Requirements


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


Comms Slides Boeing

GEO BirdSV

TT&CC&DHSoftware

Requirements


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

Comms slides boeing

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