navigation acronyms, abbreviations and definitions - International ...

MDES Measurement Data recording and data Evaluation System (DFS)
German system for permanent GNSS data recording, monitoring and
analysis.
MDGPS Maritime DGPS (USCG, part of NDGPS)
MDH minimum descent height (of landing aircraft)
MDIS Midlands Driver Information System
MDM modem data manager
MDO marine diesel oil
MDT mean down time
MDT mobile data terminal (in vehicle)
MEA minimum enroute altitude (US)
Meaconing Receiving and re-broadcasting nav signals to confuse nav receivers
MECP Mobile Electronics Certified Professional (UK)
MED Marine Equipment Directive
MEDA military emergency diversion aerodrome
MEDEVAC medical evacuation
MEDLL multipath estimating delay lock loop (eg in GPS receiver)
MEGRIN Multi-purpose Ground Related Information Network (mapping
MEHRA marine environmental high risk area
MEL minimum equipment list (eg to operate an aircraft safely)
May be associated with DDG/CDL).
MELTT French Ministry of Transport
MEMS micro-electromechanical system (eg micro IMU from ~ 1995)
MENTORE iMplemENtation of GNSS tracking & tracing Technologies fOR Eu
regulated domains
MEO medium earth orbit
Satellite orbits of 3,000-30,000 km.
MEOLUT medium earth orbit local user terminal (eg Galileo)
MEPC Marine Environment Protection Committee (IMO)
MERC maritime emergency reception centre
For dealing with ships in difficulty rather than distress.
Merged
Consortium
For Galileo Concession (bid in Oct 05)
AENA, Alcatel, EADS Space, Hispasat, Inmarsat, Finmeccanica,
Thales.
Meridian Great circle through the geographical poles of the earth
Meridional
difference
(DF) Difference of the meridional parts of any 2 given parallels
Merparts (F) Meridional parts
Length of the arc of a meridian between the equator and a given
parallel on a Mercator chart, expressed in units of 1’ of longitude on
the equator.
MERPR maximum allowable error in pseudorange
MERR (MARE) maximum allowable range error
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March 2012