navigation acronyms, abbreviations and definitions - International ...
navigation acronyms, abbreviations and definitions - International ...
navigation acronyms, abbreviations and definitions - International ...
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OSPF Orbitography <strong>and</strong> Synchronisation Processing Facility (Galileo)<br />
OSS Orbitography <strong>and</strong> Synchronisation Station (Galileo)<br />
OSTN97 Ordnance Survey National Grid Transformation 1997 (UK)<br />
Used to convert from ETRS89 to OSGB36 <strong>and</strong> ODN.<br />
OSV offshore support vessel<br />
OT&E Operational Test <strong>and</strong> Evaluation<br />
OTA operational technical accuracy<br />
Accuracy with which craft is controlled as measured by indicated craft<br />
position with respect to indicated comm<strong>and</strong> or desired position. Does<br />
not include blunder errors.<br />
OTDOA observed time difference of arrival (cellphone location technique)<br />
OTF on-the-fly<br />
OTF Open Telematics Framework<br />
OTF optimum traffic frequency (best comms freq to use - normally in HF)<br />
OTMR on-train recording <strong>and</strong> monitoring system<br />
OTS Organised Track Structure (N Atlantic)<br />
OTT over-the-top (Internet vid/audio without service provider involved)<br />
OVC overcast (8 oktas of cloud)<br />
OVN Osterreichischer Verein für Navigation<br />
Austrian Institute of Navigation<br />
OWC obstacle warning <strong>and</strong> cueing<br />
OWPA objects without a postal address (UK)<br />
OWS OGC Web Services (OWS-2 is Phase 2 Initiative)<br />
OZT obstacle zone by target<br />
p pico (SI unit multiplier of 10 -12 )<br />
P positioning<br />
P-Code (or P(Y)) Precision (or Pseudor<strong>and</strong>om) Code<br />
A PRN code transmitted by GPS satellites. Comprises 2.35 x 10 14 chips<br />
sent at 10.23 Mbps, which would take 266 days to send. Each satellite<br />
is assigned a unique one-week segment of the code, which is reset each<br />
Sat/Sun midnight.<br />
P-CPICH Primary Common Pilot Channel (GNSS downlink)<br />
P-RNAV precision area <strong>navigation</strong><br />
ICAO definition - having a nav performance equal to or better than a<br />
track-keeping accuracy of ±1 NM 95% of time.<br />
P(Y) encrypted P-Code (comprises modulo-2 addition of P-Code & W-Code)<br />
P/F platform (of satellite, eg Galileo)<br />
P/L payload (of satellite, eg Galileo)<br />
P&I (P <strong>and</strong> I) Protection <strong>and</strong> Indemnity (Club)<br />
P2P pass-to-pass (eg of accuracy)<br />
P2P peer-to-peer (eg in ITS)<br />
P3I pre-planned product improvement<br />
P4 pseudorange <strong>and</strong> phase post-processor<br />
103<br />
March 2012
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