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Abbreviations
RLS
Radar location station
RM
Relative motion
RNP
Radio navigation point
RNS
Radio navigation station
RNY
Runway
RQ
Range request
RRNS
Range-finding radio navigation systems
RRP
Radar reference points
RS
Radar station
RS
Range response
RSP
Runway supervisory points
SART
Search and rescue radar transponder
SBAS
Satellite-based augmentation system
SHF
Super-high-frequency band
SLO
Stable local oscillator
SLRL
Surveillance and landing radar locator
SM
Summator
SOG
Speed over ground
SPS
Standard Positioning Service
SRL
Secondary radar locator
SRL-A
Aerodrome surveillance radar locator
SRL-R
Route surveillance radar locator
SRNS
Satellite radio navigation systems
ST
Selsyn transmitter
STP
Signal transmission path
SWM
Surface-wave magnetron
Synch.
Synchronizing unit
SyP
Synchro pickup
TACAN
Tactical control and navigation system
TAGC
Temporal automatic gain control
TAI
Temps atomique international/international atomic time
TAP
Terminal Access Point/terminal area path
TCG
Time corrected gain
TCH
Threshold crossing height
TCI
Time to course intersection point
TDOP
Time dilution of precision
TDP
Taxiing dispatch points
TDU
Turbulence detection unit
TEC
Total number of electrons
TM
True motion
TP
Target position
T-R
Transmitter/receiver/transceiver
TRB
True radio bearing
TRD
Transmitting device
TRL
Transmitting limiter