TABLE 5-1 Comparison of Estimated Power Requirements of Land Warrior System, by Function (All Peak Power)

Function

Land Warrior, 1997a (W)

Land Warrior (Stryker), 2004b (W)

Objective Force Warrior, 2007c (W)

Communications

Soldier radio

7.4

5.97

6.2

Squad radio

14

7.8

7.8

UAW/robotic vehicle

 

 

6

Computer displays

Handheld flat panel

6.4

7.04

7.05

Helmet-mounted

4.9

1.4

0.5

Integrated sight—module display

2.6

2.65

3

Sensors

7.9

16.75

9.5

Computer

14.8

15.7

17.42

Total

58

57.31

57.97

aEstimates from NRC (1997).

bBreakdown of Stryker interoperable wattages (Brower, 2003)

• Soldier radio, 2.5 (WLAN card) + 0.17 (WLAN digital radio) + 3.3 (WLAN antenna and amplifier);

• Squad radio, 7.8 (leader radio);

• Handheld flat panel, 6.29 (display) + 0.75 (keyboard);

• Helmet-mounted display, 1.4;

• Integrated sight display, 2.15 (thermal weapon sight) + 0.5 (daylight video sight);

• Sensors (everything but the 25-W chemical agent detector), 4 (multifunction laser) + 0.2 (weapon user input device) +1.17 (card reader) + 0.17 (GPS interface) + 2.4 (GPS card) + 0.25 (dead reckoning) + 0.5 (microphone) + 0.76 (helmet integrated assembly) + 0.6 (laser detector) + 2.5 (slave hub processor) + 0.76 (computer USB hub) + 0.32 (slave hub) + 2.97 (weapon hub) + 0.15 (chemical agent detector); and

• Computer, 12 (computer processing card) + 3 (DRAM and radio frequency conversion) + 0.7 (computer/master hub subsystem).

cBreakdown of OFW wattages (Erb, 2003):

• Soldier radio, 7.8 (JTRS numbers not available; assumed the same as Stryker MBITR radio);

• Squad radio, 4.4 (communications processor card) + 0.6 (WLAN card) + 0.6 (VoIP processor) + 0.6 (WLAN antenna);

• UAW/robotic vehicle, 3 to 10 W for como-crypto interface (Brower, 2003);

• Handheld flat panel, 6.3 + 0.75 (handheld KB and cable);

• Helmet-mounted display, 0.5;

• Integrated sight, 3 (HIA, module including breakaway connection to body PAN);

• Sensors, 2.15 (thermal weapons sight) + 1.1 (daylight video sight) + 4 (multifunction laser) + 1.5 (GPS) + 0.25 (dead reckoning module) + 0.5 (microphone/speaker assembly); and

• Computer, 2.1 (computer assembly) + 10.9 (computer processing card) + 3.42 (body PAN hub) + 1 (PAN weapon hub).

NOTE: DRAM, dynamic random access memory; GPS, global positioning system; HIA, high integration actuator; JTRS, Joint Tactical Radio System; KB, kilobyte; MBITR, multiband intra/inter team radio; OFW, Objective Force Warrior; PAN, primary area network; UAW, universal access workstation; WLAN, wireless local area network; USB, universal serial bus; VoIP, Voice over Internet Protocol.

TABLE 5-2 Comparison of Estimated Peak and Average Power and Their Ratios for Land Warrior Systems

 

System (Without Radios)

Land Warrior, 1997a

Land Warrior (Stryker), 2004b

Objective Force Warrior, 2007c

Peak power (W)

35.3

43.59

37.97

Average power (W)

15.35

19.5

15.8

Average/peak ratio

0.435

0.447

0.366

aEstimates from NRC, 1997.

bEstimates from Brower, 2003.

cEstimates from Erb, 2003.



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