Name	Notation	Description	Types	Status
Geostationary orbit range	GEO	Altitude range of geostationary orbiting (GEO) objects, 35'78...	Concept	stable
Lagrangian point L1	L1	The L1 point lies on the line defined by the Sun and Earth, a...	Concept	stable
Lagrangian points L4, L5	L4L5	The L4 and L5 points lie at the third corners of the two equi...	Concept	stable
Low Earth orbit altitude range	LEO	Altitude range of low Earth orbiting (LEO) objects with an al...	Concept	stable
Medium Earth orbit altitude range	MEO	Altitude range of medium Earth orbiting (MEO) objects above l...	Concept	stable
Middle and upper stratosphere	MUS	Middle and upper stratosphere (ca. 25 - 47 km altitude)	Concept	stable
Planetary boundary layer	PBL	Bottom layer of the troposphere, also called atmospheric boun...	Concept	stable
Surface boundary layer	SBL	Layer of air tens of meters thick adjacent to the ground wher...	Concept	stable
Top of atmosphere	TOA	Top of atmosphere (ca. 100 km altitude)	Concept	stable
Upper troposphere / lower stratosphere	UTLS	Upper troposphere / lower stratosphere range (ca. 9 - 17 km a...	Concept	stable
Bulk layer	bulkLayer	Also called ocean sub-surface or bulk surface, the ocean bulk...	Concept	stable
Cloud top	cloudTop	For a given cloud or cloud layer, the highest level in the at...	Concept	stable
Deep ocean	deepOcean	Lower part of the ocean below the thermocline (below ca. 1'00...	Concept	stable
Deep soil layer	deepSoil	Lower levels of the soil, below the soil root zone and above ...	Concept	stable
Interior earth	earthInterior	Sub-surface of the Earth, including the crust, mantle and cor...	Concept	stable
Free troposphere	freeTroposphere	Atmosphere above the planetary boundary layer, in which the e...	Concept	stable
Heliosphere	heliosphere	Vast, bubble-like region of space which surrounds and is crea...	Concept	stable
High thermosphere	highThermosphere	High thermosphere (ca. 200 km to 500 km altitude)	Concept	stable
Ionosphere	ionosphere	Atmospheric region containing significant concentrations of i...	Concept	stable
Land surface	landSurface	Surface of the land masses, the lower part of the atmosphere-...	Concept	stable
Low thermosphere	lowThermosphere	Low thermosphere (ca. 100 km to 200 km altitude)	Concept	stable
Magnetosphere	magnetosphere	Region in which dynamical motions are strongly influenced, or...	Concept	stable
Mesosphere	mesosphere	Mesosphere (ca. 47 - 85 km altitude) (https://www.eoas.ubc.ca...	Concept	stable
Root region of the soil	rootRegion	Upper levels of the soil, where biological activity takes pla...	Concept	stable
Sea surface	seaSurface	Surface of the ocean, characterized by a cool skin layer (a f...	Concept	stable
Solar surface and atmosphere	sun	Surface of the Sun and layers above it, including the photosp...	Concept	stable
Total atmospheric column	totalAtmosphere	Vertical range above Earth (ca. 0 - 1'000 km altitude)	Concept	stable
Troposphere	troposphere	Troposphere (ca. 0 - 11 km altitude) (https://www.eoas.ubc.ca...	Concept	stable
Upper ocean	upperOcean	Upper part of the ocean including the thermocline (ca. 0 - 1'...	Concept	stable