The Johns Hopkins University Applied Physics Laboratory Page 1 10/15/01

LA 2020 Runs

Link 16 Baseline, option B No DMEs UAT self-interference Co-site 1030, 1090, DME interference Several altitude options

Highest # of other aircraft in view (usually FL300-400) FL150 Ground receiver

Transmit Powers A0/A1: 37-41 dB A2: 41-45 dB A3: 50-54 dB

The Johns Hopkins University Applied Physics Laboratory Page 2 10/15/01

LA 2020 Runs II

Several receiver configuration options Diversity receivers Switched receiver A0: bottom antenna only

A0 restrictions Up to FL150 Transmits on bottom antenna only

Receive filters Diversity receivers have both 0.8 MHz and 1.2 MHz Switched/A0 (bottom) have 1.2 MHz only

The Johns Hopkins University Applied Physics Laboratory Page 3 10/15/01

Impact of JTIDS Interference on State Vector Update Times for a Diversity Receiver at

High Altitude with 1.2 MHz Filter

0

5

10

15

20

25

30

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

with JTIDS

without JTIDS

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 4 10/15/01

State Vector Update Times for Diversity Receiver at High Altitude

0

5

10

15

20

25

30

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 tx, 1.2 MHz A3 tx, 0.8 MHz

A2 tx, 1.2 MHz A2 tx, 0.8 MHz

A1 tx, 1.2 MHz A1 tx, 0.8 MHz

A0 tx, 1.2 MHz A0 tx, 0.8 MHz

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 5 10/15/01

TCP Update Times for Diversity Receiver at High Altitude

0

5

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 tx, 1.2 MHz A2 tx, 1.2 MHz

A3 tx, 0.8 MHz A2 tx, 0.8 MHz

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 6 10/15/01

State Vector Update Times for Diversity Receiver at FL 150 with a 1.2 MHz Filter

0

5

10

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 tx

A2 tx

A1 tx

A0 tx

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 7 10/15/01

TCP Update Times for Diversity Receiver at FL 150 with a 1.2 MHz Filter

0

5

10

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec) A3 tx

A2 tx

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 8 10/15/01

State Vector Update Times for Switched Receiver at High Altitude

0

5

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 tx

A2 tx

A1 tx

A0 tx

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 9 10/15/01

State Vector Update Times for Switched Receiver at FL 150

0

5

10

15

20

25

30

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 tx

A2 tx

A1 tx

A0 tx

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 10 10/15/01

State Vector Update Times for A0 (bottom only) Receiver at FL 150

0

5

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 txA2 txA1 txA0 txMASPS

The Johns Hopkins University Applied Physics Laboratory Page 11 10/15/01

State Vector Update Rates for Ground Receiver

0

5

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 tx

A2 tx

A1 tx

A0 tx

MASPS

The Johns Hopkins University Applied Physics Laboratory Page 12 10/15/01

TCP Update Rates for Ground Receiver With 1.2 MHz Filter

0

5

10

15

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25

30

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Range (nmi)

Upd

ate

Tim

e (s

ec)

A3 txA2 txMASPS