navigation acronyms, abbreviations and definitions - International ...

SEE South East Europe
Seiche The oscillation of a body of water at its natural period,
superimposed on normal tidal changes.
SEIFR single-engine IFR
Selcal selective calling (HF and VHF)
SELS Southern Europe LORAN-C System
SEM standard errors of medians (statistics)
SENC system electronic navigation chart
SEP spherical error probable
The radius of a sphere, centered at the measured position, inside
which the true position lies with 50% probability.
SeqSLAM Sequence Simultaneous Localisation and Mapping
SER sequence-of-events recorder
SERA Standardised European Rules of the Air (EUROCONTROL fm 2012)
service capacity The number of users a service can accommodate simultaneously (IMO).
SES satellite/ship earth station
SES Shelf Edge Study (part of LOIS project)
SES Single European Sky (EC/EUROCONTROL project)
SESAME Project to create a European ATM roadmap
SESAR Single European Sky ATM Research (EUROCONTROL for 2020+)
Definition phase in 2006; involves a consortium of 16 EC
Members and 70 companies in 300 projects.
SET selective event training (of simulation)
SET Sensors and Electronics Technology Panel (NATO RTO)
SETS Spectrum Engineering Tracking System (US - for GPS jamming)
SF scale factor
SF secondary factor (cause of Loran signal delay - also PF and ASF)
SF static field
SF stride frequency
SFC single frequency channel
SFD satellite failure detection (component of SBAS)
SFF small form factor
SG snow grains (met)
SG symbol generator
SGEE server generated external ephemeris (EE) file
SGF Space Geodesy Facility (formally SLR)
Worldwide series of laser rangers measuring satellie heights up to
19,000 km to about 1 cm accuracy. UK one based at Herstmonceux.
SGR skywave-to-groundwave ratio (of RF transmission)
SH showers (met)
SHA siderial hour angle
SHAG Small Helicopter Advisory Group (CAA)
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