Unit Classes Standard Values
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.
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