| 
PPP
 | 
| 
P/B
 | 
Playback
 | 
| 
PA
 | 
Product Assurance
 | 
| 
PAC
 | 
Post Acceleration
 | 
| 
PAF
 | 
Payload Attach Fitting
 | 
| 
PAIP
 | 
Product Assurance Implementation Plan
 | 
| 
PAM
 | 
Parameter Archive Module
 | 
| 
PCA
 | 
Program Commitment Agreement
 | 
| 
PCB
 | 
Printed Circuit Board
 | 
| 
PCC
 | 
Program Cost
 Commitment | 
| 
PCI
 | 
Peripheral Component Interconnect
 | 
| 
PCN
 | 
Program Control Number
 | 
| 
PCU
 | 
Power
 Control Unit
 | 
| 
PDR
 | 
Preliminary Design Review
 | 
| 
PEMs
 | 
Plastic Encapsulated Microcircuit
 | 
| 
PER
 | 
Pre-Environmental Review
 | 
| 
PFM
 | 
Project Formulation
 Manager | 
| 
PGA
 | 
Programmable Gain Amplifier
 | 
| 
PI
 | 
Principal Investigator
 | 
| 
PIRN
 | 
Preliminary Interface Revision Notice
 | 
| 
PIT
 | 
Photometric
 Imaging Telescope | 
| 
PLASTIC
 | 
PLAsma
 and SupraThermal Ion and Composition
 | 
| 
PM
 | 
Program Manager
 | 
| 
PM
 | 
Project Manager
 | 
| 
PM
 | 
Proto
 Model
 | 
| 
PMC
 | 
Performance Measurement Criteria
 | 
| 
PMC
 | 
Program Management Council
 | 
| 
PMP
 | 
Project Management Plan
 | 
| 
PMS
 | 
Program Management Support
 | 
| 
PMU
 | 
Polarization Modulator Unit
 | 
| 
POC
 | 
Payload Operations Center
 | 
| 
POP
 | 
Program Operating Plan
 | 
| 
PPARC
 | 
Particle Physics and Astronomy Research Council
 | 
| 
PPCI
 | 
Power
 Peripheral Component Interface
 | 
| 
PPT
 | 
Peak Power Tracker
 | 
| 
PRISM
 | 
Precision Realtime Instrument for Surface Measurement
 | 
| 
PRL
 | 
Page Revision Log
 | 
| 
PROCC
 | 
Processor Compare Software
 | 
| 
PROCD
 | 
Processor Dump Software
 | 
| 
PROCL
 | 
Processor Load Software
 | 
| 
PROM
 | 
Programmable
 Read-Only Memory | 
| 
PSE
 | 
Power
 Supply Electronics | 
| 
PSE
 | 
Power
 Switching Electronics
 | 
| 
PSE/DU
 | 
Power
 System Electronics/Distribution Unit
 | 
| 
PSF
 | 
Point
 Spread Function
 | 
| 
psi
 | 
Pounds
 Per Square Inch | 
| 
PSK
 | 
Phase
 Shift Keying
 | 
| 
PSLA
 | 
Project Service Level Agreement
 | 
| 
PSR
 | 
Pre-Ship
 Review
 | 
| 
PSU
 | 
Pennsylvania State University | 
| 
PSU
 | 
Power
 Switching Unit | 
| 
PT
 | 
Prototype Test
 | 
| 
PVAT
 | 
Position, Velocity, Attitude, Time
 | 
| 
PVT
 | 
Position, Velocity, Time
 | 
| 
PWA
 | 
Printed Wiring Assembly
 | 
| 
PWB
 | 
Printed Wiring Board
 | 
| 
PWR
 | 
Power
 | 
| 
P/Y
 | 
Pitch/Yaw | 
| 
PZTs
 | 
Piezoelectric Transducers
 | 
 
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