Terms Table

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Please edit here: https://tinyurl.com/eddy4R-terms

Below table is static (legacy), DON'T edit.

code	description	Units	Comment
00 … 9999	Numerical identifiers
abl	atmospheric boundary layer
abs	Absolute (value)
acc	Acceleration	m s-2
agl	Above ground level
agr	Aggregate		For use such as in aggregating from hourly to daily timescale
air	air		For example to distinguish air temperature tempAir from sonic temperature tempSoni
airc	Aircraft
alb	Albedo
alg	Algorithm		For use such as in algorithm name NameAlg
all	All
alt	Alternative
amf	AmeriFlux
angYaxs	Pitch	rad	Pitch angle
anls	analysis
ang	angle / angular
api	Appication program interface
arch	Archive
asl	Above sea level
asrp	absorptance
atm	atmosphere	atm	Also a unit of measurement
atto	atto	a = 1·10-18	Unit prefix
attr	attribute(s)
aux	Auxiliary
auto	Auto, automatic, automation		For use such as auto-correlation. SEE: cros
avct	Advection, advective
avel	Angular velocity	rad s-1
az	Azimuth angle
bad	bad		Not acceptable/bad
bar	bar	bar	Unit of measurement
baro	barometric		For use such as barometric pressure
base	base
Basc	Basic		For use in basic vs. expanded data package
bgn	begin		For use such as in the beginning of a stretch of time, space SEE: strt USE: bgn
bias	statistical measure of location such as differences of mean, median, mode		for use such as in descriptive statistics: bias, precision, root-mean-square deviation…; not equal to ofst, which is used in regression analysis
bin	Binning method
bld	build		For use such as in Git or Docker builds. In case of Docker used to distinguish from an image resulting from commits
blk	black		The color black
body	body		For use such as in body coordinate system
bou	Boundary;		change to boundary layer
br86	Brock (1986)		reference to a specific de-spiking algorithm
brk	break		As in, e.g., break point
btw	between
cal	Calibration
calc	Calculation		For example, time that a process/calculation starts TimeCalc
cart	Cartesian coordinate representation		For example, unit circle representation of a polar angle (see pol)
ccat	Concatenate
cell	Cell		For use such as in grid cell
cels	Celsius	centigrade	Unit of measurement
cfgr	configure/configuration
char	Character		Data type
clas	Class
clst	Closest		The closest value or nearest neighboring value.
cmbd	combined, combination
cnpy	Canopy
cnst	Constant
cnti	centi	c = 1·10-2	Unit prefix
co2	Carbon dioxide
coef	Coefficient		for use such as in regression; standard use for n-order polynomials: coef00 (offset), coef01 (first power), …, coef0n; for multi-variate regression: e.g. coefOfst, coefAngPtch, coefAngRoll
col	Column
cold	Cold		For use such as opposite to warm surface patches, temperatures
com	combination
copy	copy		To copy
cmd	command		For use, e.g. as system command
cmt	commit		For use such as in Git or Docker commits. In case of Docker used to distinguish from an image built from a Dockerfile
cmpl	complete		Done, completed, finished
cntn	Content(s)		Contents of e.g. a file or message
cntr	Centered		As in a windowing function.
comb	combine		Combine/merge
conc	Concentration
conf	confidence		for use such as in confidence level
cons	Consistent/consistency
conv	Conversion
cor	correction
corl	Coriolis
corr	correlation
cp	Specific heat capacity at constant pressure
crit	criterion		for use such as in stopping criterion for an iteration
cros	Cross		For use such as cross-correlation. See: auto
cstv	Consecutive
cum	Cumulative
curr	Current		Unit type
cv	specific heat capacity at constant volume
cvct	Convection, convective
cybi	NEON cyberinfrastructure
data	Data		Can be used in computing R environment and for documentation purposes
date	General term for the date representation		For example, ISO (default in eddy4R, yyyy-mm-dd). Other representation will need specifiers, for example day of the year (DOY, DateDoy) . Whenever time is specified, either combination with date or individually, the term time should be used instead of date
day	day		Should not stand alone, modifier for time, example use timeDay
db	database
dcmp	decomposition		for use such as to express Wavelet time-frequency decomposition in more general terms
deba	Deadband		A deadband is an interval of a signal domain or band where no action occurs.
deca	deca	da = 10	Unit prefix
deci	deci	d = 0.1	Unit prefix
decm	decimal		Decimal number (includes integer and fractional parts, e.g. timeDoyDecm)
def	Definition		For use such as in function file names
deg	Degree	Decimal degree	Unit of measurement
depe	Dependent, dependency, dependent variable
dens	Density	m-3	Amount per volume [m-3]. Numerator units specified by modifier (e.g. densMass or densMole)
derv	Derived		Constructed from simpler quantities
detr	Detrend
deve	Development		For use such as in development version of a software
dew	Dew point		For example used in dew point temperature tempDew
df	Degree of freedom
dfir	DFIR (Double-fenced international reference) rain gauge
dflt	Default
diag	Diagnostic value
diff	Difference, differential		for use such as in (i) discrete sample-by-sample differences, no statistical operation such as mean etc. is applied, (ii) differential pressure
dir	Directory, folder		Referring to directory, folder in computer system
dis	Dispersion
disc	Discontinue		Discontinuous variables i.e. wind direction
disp	Displacement
dist	Distance	m	The term 'elev' is specific to a geographical position (i.e. the height of a geographic location above/below a reference level such as 'elevAsl' or 'elevAgl', for example in conjunction with the horizontal lon/lat position). For local cartesian coordinate systems, for example sonic anemometer, 'distZaxis' (below) would be used.
diu	Diurnal cycle
dlmt	delimiter
dlta	delta		Specific for isotope i.e. deltaC13
dock	Docker		For use such as referring to a file version for Docker deployment
docu	Document		Documentation for example, of datasets in R package
domn	Domain		General term for use as in e.g. time domain, NEON domain, etc.
DOY	Date of year		Float number SEE: timeDoy
dp	Data product		e.g. NEON data product; dp00, dp0p, dp01, dp02, dp03, dp04
l0	Level 0		For specific reference to NEON level 0 data
dp00
dry	Dry air (without water vapor)
dscr	description, describe
dspk	Despike		For use as in, e.g. despiking a data series
dupl	duplicate
ec	Eddy-covariance
eco	Ecosystem
ecse	eddy-covariance storage exchange
ecte	eddy-covariance turbulent exchange
eddy	eddy4R		Refers to the eddy4R software package
elev	Elevation		The term 'elev' is specific to a geographical position (i.e. the height of a geographic location above/below a reference level such as 'elevAsl' or 'elevAgl', for example in conjunction with the horizontal lon/lat position). For local cartesian coordinate systems, for example sonic anemometer, 'distZaxis' (below) would be used.
end	end		For use such as in the ending of a stretch of time, space
engy	Energy		Unit type
enu	east-north-up coordinate system		as opposed to north-east-down coordinate system; for use such as in angEnuXaxs for roll etc
env	Environment/environmental
epoc	epoch		For use as in, e.g. time
ERFs	Environmental response functions		The extracted environmental response functions
erf
erth	Earth
err	Error
estg	Easting	m
eval	Evaluate/evaluation
evtr	Evapotranspiration		For use such as in distinguishing H2O flux units
exa	Exa	E = 1·1018	Unit prefix
exec	executable		For use such as in executing a function, workflow
exis	existing
exmp	example
exp	exponential
expc	expected
expd	Expanded		As in basic and expanded data sets
ext	external
extr	extract		i.e. to pull something out of something else
fals	FALSE		Matching a logical value of FALSE
feet	feet	ft	Unit of measurement
ff	fast file-backed object
file	File	string	For use such as in filename NameFile
filt	Filter
finl	Final		For use as in, e.g. the final result after iteration
frst	First		As in first value in a windowing bin
fit	fitting
flag	flag		A general flag, as opposed to qf being specific for quality flag
fld	Field
flow	Workflow		For use such as in workflow file names
flux	flux		A general term for flux
fm	Flux Mapping
fmw	Firmware
fmt	Format
Fokn	Foken		Referring to Foken (2008)
frac	Fraction	unitless	Numeric fraction
foot	footprint
freq	frequency	Hz = 1/s
frht	Fahrenheit	Deg F	Unit of measurement
fric	friction
frt	flowrate
from	From		The beginning of a numerical sequence or origin of a logical statement, complementary to "to"
func	Function
gas	Gas, gas phase		Use with specifier, for example gasRefe, GasSpcs, etc
gbm	Generalized boosted regression modeling
genl	General
get	get		A general term for obtaining something via code
gf	Gap-fill
giga	Giga	G = 1·109	Unit prefix
Gmma	Ratio of specific heat at constant pressure to specific heat at constant volume (Cp Cv-1)	Dimensionless (ratio)
good	good		Acceptable/good
gram	gram	g	Unit of measurement
grid	Grid or map		For use such as in grid cell
grnd	Ground
grp	group		Such as group in an hdf5 file, or a grouping of various inputs for qfqm
h2o	Water (liquid or vapor)
hdf5	hierarchical data format version 5
head	header		As in the header specifying columns names within a file containing data
hect	hecto	h = 1·102	Unit prefix
heat	heat		e.g., soil heat flux, sensible heat
high	High
hist	histogram
distZaxs	height
host	host		For use such as in host operating system
hour	hour	h	Unit of measurement; modifier for time, example use timeHour
agrHour	Aggregated at hourly temporal scale
hor	Horizontal		General term for horizontal (e.g. NEON horizontal index of a data product). Not to be used for cartesian axis identification
hpf	High-pass filter
hrtz	Hertz	Hz	Unit of measurement
hut	Instrument hut
id	identifier		HDF5 identifiers
idep	Independent, independent variable
idx	Index		See pos. Index refers to a subset of set over which an operation is applied
in	into
inch	Inch	in	Unit of measurement
incr	increment
indt	indeterminate		Could not be determined
info	Information
inj	injection		For injection of water isotopic validation standard
inlt	inlet
inp	Input		For use such as in input directory DirInp
inst	Install		Physical and / or software installation
intg	Integer		integer number, e.g. timeDoyIntg
intl	Internal
intp	interpret
ion	ion		Soil ion content
irga	IRGA (infrared gas analyzer)
isop	isotope
itc	Integral turbulence characteristics
iter	iteration		Number of times a particular algorithm sequence has been run
itgr	integral
joul	Joule	J	Unit of measurement
kelv	Kelvin	Kelvin	Unit of measurement
kern	Kernel		i.e. Kernel smoothing method
kilo	kilo	k = 1·103	Unit prefix
kppa	Kappa exponent for ideal gas law (Rs/Cp = ratio of specific gas constant to specific heat at constant pressure)	Dimensionless (ratio)
lab	laboratory
laby	Label of y axis
lag	Time lag
last	Last value		As in last value in a bin window
lat	Latitude	rad
lead	Leading		As in leading window for binning
lib	Library		Referring to the "library" that contains many R-packages on a computer system, e.g., "C:/Program Files/R/R-3.2.2/library"
lin	Linear		SEE: lsq
line	Line		As in a line of a data file, or line of code, or line in the sand, etc.
list	List
loc	Location		General term for use such as in geographical location
loca	Local representation		For use such as in inpLoca, the list of inputs for a function
lon	Longitude	rad
log	Logarithm
loop	Loop		Loop construct, such as for(), sapply() etc.
low	Low
LPRF	Local Polynomial Regression Fitting
lt	Local time
lsq	Least-squares method		SEE: lin
lvl	Level
mapp	mapping	-	A mapping between quantities
mass	Mass	kg
max	maximum
mdc	Aggregated at diurnal cycle temporal scale
mean	Mean
meas	Measurement
med	Median
mega	Mega	M = 1·106	Unit prefix
met	meteorological		For use such as in coordinate systems
meth	method		For use such as in distinguishing different algorithms for the same purpose
metr	meter	m	Unit of measurement
mfc	Mass flow controller
mfr	manufacturer
mfm	Mass flow meter
micr	micro	u = 1·10-6	Unit prefix
mile	mile	mi	Unit of measurement
mili	milli	m = 1·10-3	Unit prefix
min	minimum
mint	minute	min	Unit of measurement; modifier for time, example use timeMint
agrMint	Aggregated at minutely temporal scale
modl	model
mole	mole	mol
molm	Molar mass of air constituent	g mol-1
agrMnth	Monthly aggregated
mnth	month		Modifier for time, example use timeMnth
mnt	mount point		For use such as in DirMnt
mome	momentum		For use such as in momentum flux, fluxMome
mtch	Match, compare		For use as in comparing the output from output and reference files
mtrx	matrix	-
mult	Multiple		i.e. more than one
na	NA value
Name	Name	string	Referring e.g. to name of algorithm NameAlg, name of package NamePack etc.
nano	nano	n = 1·10-9	Unit prefix
natu	Natural
naut	Nautical		For use e.g. to distinguish between international miles ("mile") and nautical miles ("mileNaut")
ned	north-east-down coordinate system		as opposed to east-north-up coordinate system; for use such as in angNedZaxsNrthTrue for clockwise azimuth against true north etc.
neon	National Ecological Observatory Network
net	net		remaining after deductions, opposed to gross
newt	Newton	N = m-1·kg·s-2	Unit of measurement
ngtv	negative		Opposite to positive
Nk12	Nordo and Katul, 2012		Wavelet Frequency response correction
nois	Noise		Unit of measurement
norm	Normal or normalized		For use as in, e.g. normal distribution, or normalizing a dataset to a reference
not	Not		The opposite of
num	quantity	Number count	A count of elements. Use modified to specify what the count refers to (e.g. numSamp = number of samples)
numc	Numeric
nthg	Northing	m
Obkv	Obukhov		for use such as in Obukhov lenght, distObkv
off	off		For off, on purposes
ofst	Offset		for use such as in regression analysis: see coef for example
ohm	Ohm	Ohm	Unit of measurement (electrical resistance)
ord	Order (ex. Polynomial order)	dimensionless
out	Output		For use such as in output directory DirOut
pack	Package or packaging		Referring to individual R-packages
para	Parameter
pasc	Pascal	Pa	Unit of measurement
pdr	NEON's Public Data Repository
perc	Percentage
perm	Permutate
Pers	persistance
peta	Peta	P = 1·1015	Unit prefix
pf	Planar-fit
pico	pico	p = 1·10-12	Unit prefix
plot	Plot
pltf	platform		Platform of eddy-covariance technique: e.g. tower or aircraft
pnd	pound	lb	Unit of measurement
pois	Poisson's equation
pol	Polar coordinate representation		also see cart
poly	Polynomial
pot	Potential		e.g. potential temperature (tempPot)
powr	Power		Unit type
prcs	Precision	Same units as dataset	Precision
prd	Period (rotation or cycle)	s	The term 'prd' specifies a 'cyclic' property of time. For use of time in 'linear' time dimension sense, the term 'time' (below) is used.
pres	Pressure
prfx	Prefix
psi	Pounds per square inch	psi	Unit of measurement (pressure)
pstv	positive		Opposite to negative
qaqc	Quality assurance quality control
qf	Quality flag	Dimensionless (-1, 0, 1)
qntl	Quantile	proportion	cutpoints dividing the range of a probability distribution
rad	radian	rad
radi	radiation		e.g., incoming long wave radiation (radiLwIn)
rand	random
raw	raw		e.g., raw data, raw signal
rctv	reactive		e.g. reactive values in Shiny applications
read	reading-in a file, object etc.
real	Real number		A non-NA value part of the set of real numbers
refe	Reference	Same units as test data
reg	Regression		This is also used for regulator for gas delivery
rep	Replicate
repl	replacement		Replacing a given value with a different value
repo	Repository		Such as Github repository
reps	Repeat
resd	Residual		The difference between the observed value of the dependent variable and the predicted value .
reso	Resolution	Dependent on modifier	Minimum resolvable difference
revw	Review		As in the science review quality flag
rsmp	Resampling
Rg	Universal gas constant
rglr	regular		For use such as in regularization, i.e. re-sampling observations over an equidistant time or space domain SEE: genl
rh	Relative humidity	Dimensionless ratio
rltv	Relative		Relative
rmsd	Root-mean-square deviation		Root-mean-square deviation
rmv	Remove or delete
rng	Range	Dependent on modifier	For use in specifying a minimum and maximum value SEE: bou
angXaxs	Roll angle	rad
rgh	roughness		for example roughness length distZaxsRgh
ros	rOpenSci		Referring to rOpenSci tools, such as the ropensci Docker image
rot	rotation
row	Row
rpo	Response plot output
rpt	Reported object, i.e. object that is returned from a function call
rug	Rug		Flag for plotting rugs on axis
Rs	Specific gas constant	J kg-1 K-1
rsq	R-squared	-	Coefficient of determination
rtio	Dimensionless ratio	Dimensionless ratio
s3	S3 File system
samp	Sample, sampling	-	E.g. sample size = numSamp
sat	Saturation or Saturated	-
scal	Scale
sccb	software change control board		https://en.wikipedia.org/wiki/Change_control_board
sci	Science		For use such as in scientific parameters ParaSci
sclr	Scalar		Scalar quantity without direction, i.e. opposite of "vector"
scnd	Second/secondary	s	Unit of measurement; modifier for time, example use timeScnd
se	Standard error
sens	Sensor; sensitivity
set	Set point; a collection of distinct objects/elements		Used for flow rate set point; use for a set of idx (multiple elements in an object)
sd	Standard deviation
site	Measurement site
sgnl	Signal
slct	Select		Select or choose
slp	Slope
smmy	Summary
smth	Smooth, Smoother, Smoothing
soil	Soil
soni	Ultrasonic anemometer/thermometer
span	spans
spac -> spce	space, spatial
Spcs	Chemical species		Carbon, carbon dioxide, methane, etc. SEE: gas
spec	Specific
spht	Specific heat	J kg-1 K-1 m2 s-1 K-1
spk	spike		For use as in, e.g. data spike
splt	split		For use as in, e.g. splitting a character string into multiple sub strings.
spr	separates		Separates used for dividing the dataset
sq	square		Per coding stringent convention this should be ord02. However, since "square" (i) cuts the term length by 1/2, (ii) has a specific scientific term, and (iii) is used so commonly, we add it here.
ssi	Signal strength
sta	state		Can refer to base-state for time-domain EC, or Arizona and Alaska because they are states of the U.S., etc.
stat	statistic
stbl	stable, stability		For use such as in atmospheric stability, stable atmospheric conditions, stable version of a software
step	step test
stna	stationarity		e.g., stationarity test
stor	storage
str	string
strt	structure		HDF5 file structure
stus	status
sub	subset
sufx	Suffix
sum	Sum		Sum or total
surf	Surface
symb	Symbol		i.e. unit symbol
sync	synchronized		Time synchronization
temp	Absolute temperature	K
tera	Tera	T = 1·1012	Unit prefix
test	Test data	Same units as reference data
tfm	Transform
theo	Theoretical		For use such as in theoretical model vs. empirical finding
thsh	Threshold	Same units as modifier
time	timestamp; duration	timestamp (incl. date): depending on modifier; duration:s	The term 'time' specifies a 'linear' time dimension. Example use for timestamp: timeDoyIntg; For use of time in cyclic sense, the term 'prd' (above) is used. Whenever time is specified, either combination with date or individually, the term time should be used instead of date
tmp	Temporary		For use such as in temporary directory DirTmp
to	To		The end of a numerical sequence or target of a logical statement, complementary to "from"
tol	Tolerance
ton	Ton		Unit of measurement (mass). If without modifiers (e.g. tonUS), ton refers to SI/Metric ton.
tool	tools		e.g. workflows that don't belong to either an eddy4R package or principal data processing workflow
top	Physical location; or statistical measure of location		Air temperature measurements at tower top level (tempAirTop) vs the air temperature profile measurements (tempAirLvl).
torr	Torr	torr	Unit of measurement (pressure)
towr	Tower
tplt	template
trlg	Trailing		As in a trailing window for binning
trnd	Trend
trty	tertiary
TRUE	TRUE		Matching a logical value of true
tube	Tube
turb	turbulent
type	Type
tz	Time zone
ucrt	uncertainty		suggest ucrt, which can be consistently used with eddy4R.ucrt
unif	Uniform		For use such as in uniform distribution; can be used as equally distributed
unit	unit(s)		i.e. the units of a variable
univ	universal
unst	Unstable		Referring to unstable atmospheric conditions
url	Web address	string	For example, www.dropbox.com
us	United States
usr	user		For use such as eddy4R user, user-customizable etc.
utc	Coordinated universal time		SEE: zone
utm	Universal Transverse Mercator Coordinate system
vali	Validation
valu	value
valv	valve
var	General variable
vari	variance
vect	vector
velo	Velocity	m s-1
ver	Vertical		General term for vertical (e.g. NEON vertical index of a data product). Not to be used for cartesian axis identification
vers	version
virt	Virtual		e.g. virtual temperature (tempVirt)
vrbs	verbose		Used for example, as a function input parameter to specify whether function output includes additional diagnostic values
vol	Volume / volumetric
volt	volt	V	Unit of measurement
vonk	Von-Karman Constant	unitless
warm	Warm		For use such as opposite to cold surface patches, temperatures
watt	Watt	W	Unit of measurement
wet	Wet		Air including both, dry constituents and water vapor
wght	Weight		Multiplication factor for e.g. weighting results
whr	index position	unitless	positions of which() index or selective index SEE:pos
wi	within
widt	width
wndw	Window		good for distinguishing PrdWndw vs. PrdIncr
wind	Wind
wrap	Wrapper		For use such as in function file names
wrk	Work		For use such as in working directory DirWrk
xaxs	Along-axis of a Cartesian coordinate system
yaw	Yaw angle	rad
yaxs	Cross-axis of a Cartesian coordinate system
year	year	y	Unit of measurement; modifier for time, example use timeYear
zaxs	Vertical axes of a Cartesian coordinate system
zero	zero		Such as zero gas
zone	UTC zone		SEE: utc
zoo	Zoo function