Unit Classes Standard Values
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The PDS4 master schema defines a set of unit classes - related units of measure - to be used for defining label attributes in all dictionaries. Following is a list of these unit classes and the standard values allowed for attributes with that unit type. Case, spacing, and abbreviation all count when it comes to matching values.
As of 2015-04-29, this page has been updated for release 1.4.0.0 of the PDS4 Information Model.
Contents
- 1 Acceleration
- 2 Amount of Substance
- 3 Angle
- 4 Angular Velocity
- 5 Area
- 6 Current
- 7 Frame Rate
- 8 Frequency
- 9 Length
- 10 Map Scale
- 11 Mass
- 12 Miscellaneous Units
- 13 Optical Path Length
- 14 Pressure
- 15 Radiance
- 16 Rates
- 17 Solid Angle
- 18 Spectral Irradiance
- 19 Spectral Radiance
- 20 Storage
- 21 Temperature
- 22 Time
- 23 Velocity
- 24 Voltage
- 25 Volume
- 26 Wavenumber
Acceleration
- cm/s**2
- km/s**2
- m/s**2
Amount of Substance
- mol
Angle
- arcmin
- arcsec
- deg
- hr
- mrad
- rad
Angular Velocity
- deg/day
- deg/s
- rad/s
Area
- m**2
Current
- A
- mA
Frame Rate
- frame/s
Frequency
- Hz
Length
- AU
- Angstrom
- cm
- km
- m
- micrometer
- mm
- nm
Map Scale
- km/pixel
- m/pixel
- mm/pixel
- pixel/deg
Mass
- g
- kg
Miscellaneous Units
- DN
- electron/DN
- pixel
Optical Path Length
- airmass
Pressure
- Pa
- bar
- hPa
- mbar
Radiance
- W*m**-2*sr**-1
- W(m**s*sr)
Rates
- counts/bin
- kilobits/s
Solid Angle
- sr
Spectral Irradiance
- SFU — NOTE: Do not use this unit in SBN data
- W*m**-2*Hz**-1
- W*m**-2*nm**-1
- W*m**-3
- W/m**2/Hz
- W/m**2/nm
- W/m**3
- μW/cm**2/μm
- uW*cm**-2*um**-1 — NOTE: Do not use this unit in SBN data
Spectral Radiance
- W*m**-2*sr**-1*Hz**-1
- W*m**-2*sr**-1*nm**-1
- W*m**-2*sr**-1*um**-1 — NOTE: Do not use this unit in SBN data
- W*m**-3*sr**-1
- W/m**2/sr/Hz
- W/m**2/sr/nm
- W/m**2/sr/μm
- W/m**3/sr
- uW*cm**02*sr**-1*um**-1 — NOTE: Do not use this unit in SBN data
- μW/cm**2/sr/μm
Storage
- byte
Temperature
- K
- degC
Time
- day
- hr
- julian day
- microseconds
- min
- ms
- s
- yr
Velocity
- cm/s
- km/s
- m/s
Voltage
- V
- mV
Volume
- L
- m**3
Wavenumber
- cm**-1
- m**-1
- nm**-1
- 1/cm
- 1/m
- 1/nm