PGK(Precision Guidance Kit), M1156

burke(2010)-pgk overview.pdf

storsved-pgk 2008.pdf

• US Army, ATK

• Screw-on fuze replacement, $3000 low-rate initial production

• 50m CEP (initial), 30m CEP (final)

• 155mm howitzer fired, later applied to 105mm system also(2008), IOC at FY12

• 150-275Hz spin, 330-830m/s speed, 20kg setback, 6-27km range

• Deep fuze well:

• 2-D GPS SAASM guidance

• Fixed canard guidance: ATK

• Inductive mission setting: EPIAFS

• Rockwell Collins GPS receiver

• Draper Labs IMU

- GPS with roll angle determination

- No battery: supercapacitor (pre-flight), on-board alternator(in-flight)

- Built-in tactical telemetry: development tests, stockpile surveillance, lot acceptance tests

- De-spun canard assembly

- HOB/telemetry radome

• Antenna cylinder: dia 62mm, h 45mm, antenna: 31*31mm, single antenna, small patch antenna [johnson-pgk 2012.pdf]

• Unit cost: 3000불 이하

• 수출: 호주 2013.8 약 4000발 및 부대장지, 5800만불(660억원, 발당 1650만원)

• IEC (L-3 Comm. subsidiary) TruTrak Evolution (TTE) GPS receiver

- Size: 1.75"x2.45", 3.07"x0.93", 2.45"x2.45" for various projectile applications

- Low power consumption: 3W @ highest performance mode, 0.7W @ low power mode, 20mW @ standby mode

- Anti-jamming: 4s acquisition at 55dB J/S, track at 65dB J/S and at 90dB J/S with optional FaSTAP(with Deep Integration with IMU)

- Accuracy: 3m(1 sigma) pseudorange, 0.025m (1s) delta range

- TTFF: <6s (direct Y, hot start, no jamming), <5s (reacquisition)

- Navigation: unfiltered GPS-only least squares, deeply integrated Kalman filter, IMU-less attitude determination

- Hardware: 24-ch., L1 C/A, L1 & L2 P(Y), 4 embedded processors, synchronization on pulses, 0-100,000ft altitude, 20kg 16ms gun setback, 5kg 1ms lateral balloting, SAASM

- Dynamics: <1200m/s velocity, < 10g acceleration

- Used in Excalibur also.

PGK for 105mm M927 round:

- Use the same PGK for 155mm.

- Test firing on Jul. 2008.