Notation	Name	Description	Status
001	Height of station		stable
002	Height or altitude		stable
003	Geopotential		stable
004	Pressure		stable
005	Height increment		stable
006	Height above station		stable
007	Height		stable
008	Geopotential		stable
009	Geopotential height		stable
010	Flight level		stable
012	Grid point altitude		stable
021	Elevation		stable
022	Solar elevation		stable
024	Satellite zenith angle		stable
025	Solar zenith angle		stable
026	Satellite zenith angle		stable
030	Height of station ground above mean sea level		stable
031	Height of barometer above mean sea level		stable
032	Height of sensor above local ground (or deck of marine platform)		stable
033	Height of sensor above water surface		stable
035	Maximum size of z-dimension		stable
036	Level index of z		stable
040	Impact parameter		stable
061	Depth below land surface		stable
062	Depth below sea/water surface		stable
063	Depth below sea/water surface (cm)		stable
064	Representative height of sensor above station		stable
065	Water pressure		stable
070	Drogue depth		stable