Data taxonomy
This data taxonomy represents a selfconsistent database of terms used with in the Network of Models schema. It allows for a uniform representation of model inputs and outputs.
Physical quantites are the lowest level fundamental quantites with a detail and specific meaning across the wide range of engineering scientific disciplines.
Derived values are named quantities that represent a physical trait or measurement. They are typically of a particular physical quantity, e.g. altitude is a derived value (not a physical quantity) and has units of length (a physical quantity). Equally, thickness has the same phsical quantity (i.e. length) but is provided as a derived value as to distiguish betweeen these very different (conceptually) quantities that are both a type of length.
Composite data types are groups of derived values or physical quantities that form a well defined type of model input or output. They are specified by the columns of data expected to for such data.
Name  Description  Units 

absement  Measure of sustained displacement: the first integral of displacement  m*s 
absorbed_dose  Measure of the energy deposited in matter by ionizing radiation per unit mass  Gy 
absorbed_dose_rate  Absorbed dose received per unit of time  Gy/s 
acceleration  Rate of change of velocity per unit time: the second time derivative of position  m*s^2 
angular_acceleration  Change in angular velocity per unit time  rad*s^2 
angular_momentum  Measure of the extent and direction an object rotates about a reference point  kg*s^1*m^2 
angular_velocity  The angle incremented in a plane by a segment connecting an object and a reference point per unit time  rad*s^1 
area  Extent of a surface  m^2 
area_density  Mass per unit area  kg*m^−2 
capacitance  Stored charge per unit electric potential  F 
catalytic_activity  Change in reaction rate due to presence of a catalyst  kat 
catalytic_activity_concentration  Change in reaction rate due to presence of a catalyst per unit volume of the system  kat*m^−3 
chemical_potential  Energy per unit change in amount of substance  J*mol^1 
crackle  Change of jounce per unit time: the fifth time derivative of position  m*s^5 
current_density  Electric current per unit crosssection area  A*m^2 
dose_equivalent  Received radiation adjusted for the effect on biological tissue  Sv 
dynamic_viscosity  Measure for the resistance of an incompressible fluid to stress  Pa*s 
electric_charge  The force per unit electric field strength  A 
electric_charge_density  Electric charge per unit volume  C*m^3 
electric_current  Electrical current  A 
electric_displacement  Strength of the electric displacement  C*m^2 
electric_field  Strength of the electric field  V*m^1 
electric_potential  Energy required to move a unit charge through an electric field from a reference point  V 
electrical_conductance  Measure for how easily current flows through a material  S 
electrical_conductivity  Measure of a material's ability to conduct an electric current  S*m^1 
electrical_resistance  Electric potential per unit electric current  ohm 
electrical_resistivity  Bulk property equivalent of electrical resistance  ohm*m 
energy  Energy  MeV 
energy_density  Energy per unit volume  J*m^−3 
entropy  Logarithmic measure of the number of available states of a system  J*K^1 
force  Transfer of momentum per unit time  N 
frequency  Number of (periodic) occurrences per unit time  Hz 
fuel_efficiency  Distance traveled per unit volume of fuel  m*m^3 
halflife  Time for a quantity to decay to half its initial value  s 
heat  Thermal energy  J 
heat_capacity  Energy per unit temperature change  J*K^1 
heat_flux_density  Heat flow per unit time per unit surface area  W*m^2 
illuminance  Luminous flux per unit surface area  lx 
impedance  Resistance to an alternating current of a given frequency, including effect on phase  ohm 
impulse  Transferred momentum  N*s 
inductance  Magnetic flux generated per unit current through a circuit  H 
intensity  Power per unit cross sectional area  W*m^2 
irradiance  Electromagnetic radiation power per unit surface area  W*m^2 
jerk  Change of acceleration at the unit time: the third time derivative of position  m*s^3 
jounce (or snap)  Change of jerk per unit time: the fourth time derivative of position  m*s^4 
length  Linear distance  m 
linear_density  Mass per unit length  kg*m^−1 
luminous_flux  Perceived power of a light source  lm 
mach_number  Ratio of flow velocity to the local speed of sound  1 
magnetic_field_strength  Strength of a magnetic field  A*m^1 
magnetic_flux  Measure of magnetism, taking account of the strength and the extent of a magnetic field  Wb 
magnetic_flux_density  Measure for the strength of the magnetic field  T 
magnetization  Amount of magnetic moment per unit volume  A*m^1 
mass  Mass  kg 
mass_density  Mass per unit volume  kg*m^3 
mass_fraction  Mass of a substance as a fraction of the total mass  kg*kg^1 
mean_lifetime  Average time for a particle of a substance to decay  s 
molar_concentration  Amount of substance per unit volume  mol*m^−3 
molar_energy  Amount of energy present in a system per unit amount of substance  J*mol^1 
molar_entropy  Entropy per unit amount of substance  J/K*mol 
molar_heat_capacity  Heat capacity of a material per unit amount of substance  J/K*mol 
moment_of_inertia  Inertia of an object with respect to angular acceleration  kg*m^2 
momentum  Product of an object's mass and velocity  kg*m*s^1 
number_flux  Number per area per second  ['m^2*s^1', 'm^2*s^1*sr^1', 'm^2 s^1 (MeV/n)^1', 'm^2 s^1 sr^1 (MeV/n)^1', 'm^2 s^1 MeV^1', 'm^2 s^1 sr^1 MeV^1', 'm^2 s^1 sr^1 (MeV cm^2 g^1)^1'] 
number_fluence  The time integral of a flux.  ['m^2', 'm^2*sr^1', 'm^2*(MeV/n)^1', 'm^2*sr^1*(MeV/n)^1', 'm^2 sr^1 (MeV cm^2 g^1)^1'] 
permeability  Measure for how the magnetization of material is affected by the application of an external magnetic field  H*m^1 
permittivity  Measure for how the polarization of a material is affected by the application of an external electric field  F*m^1 
plane_angle  Ratio of circular arc length to radius  radian 
pop  Rate of change of crackle per unit time: the sixth time derivative of position  m/s^6 
power  Rate of transfer of energy per unit time  W 
pressure  Force per unit area  Pa 
radiance  Power of emitted electromagnetic radiation per unit solid angle per emitting source area  W/m^2 sr 
radiant_intensity  Power of emitted electromagnetic radiation per unit solid angle  W*sr^1 
radioactive_activity  Number of particles decaying per unit time  Bq 
radioactive_dose  Ionizing radiation energy absorbed by biological tissue per unit mass  Gy 
rate  Rate of a quantity per time  s^1 
reaction_rate  Rate of a chemical reaction for unit time  mol*m^3*s^1 
reduced_mass  Reduced mass  kg 
refractive_index  Factor by which the phase velocity of light is reduced in a medium  1 
reluctance  resistance to the flow of magnetic flux  H^−1 
shear_stress  Shear stress  Pa 
solid_angle  Ratio of area on a sphere to its radius squared  sr 
specific_energy  Energy density per unit mass  J*kg^−1 
specific_heat_capacity  Heat capacity per unit mass  J*K^1*kg^1 
specific_volume  Volume per unit mass (reciprocal of density)  m^3*kg−1 
spin  Quantummechanically defined angular momentum of a particle  kg*m^2*s−1 
strain  Extension per unit length  m/m 
normal_stress  Force per unit oriented surface area  Pa 
surface_tension  Energy change per unit change in surface area  N*m^1 
time  The measurement of the duration of two or more events  s 
temperature_gradient  steepest rate of temperature change at a particular location  K/m 
thermal_conductance  Measure for the ease with which an object conducts heat  W/K 
thermal_conductivity  Measure for the ease with which a material conducts heat  W/m*K 
thermal_resistance  Measure for the ease with which an object resists conduction of heat  K/W 
thermal_resistivity  Measure for the ease with which a material resists conduction of heat  K*m/W 
torque  Product of a force and the perpendicular distance of the force from the point about which it is exerted  N*m 
velocity  Moved distance per unit time: the first time derivative of position  m/s 
volume  Three dimensional extent of an object  m^3 
volumetric_flow_rate  Rate of change of volume with respect to time  m^3*s−1 
wavelength  Perpendicular distance between repeating units of a wave  m 
wavenumber  Repetency or spatial frequency: the number of cycles per unit distance  m^−1 
wavevector  Repetency or spatial frequency vector: the number of cycles per unit distance  m^−1 
weight  Gravitational force on an object  N 
work  Transferred energy  J 
youngs_modulus  Ratio of stress to strain  Pa 
Name  Description  Units 
Name  Quantity  Units  Qualifiers 

symbol_label Text label 
1 


stopping_power Stopping power, dE/dX 
['MeV*cm^1', 'MeV*cm*g^1'] 


coordinate A positional coordinate 
[] 


particle_current_density Electric current per unit crosssection area 
['A*m^2', 'A*m^2 MeV^1'] 


non_ionising_dose Non ionising dose 
MeV*g^1 


yield Emission yield 
1 


number_density Number density 
m^3 


relative_degradation Relative degradation 
1 


atomic_number Atomic number 
number  1 

abundance_ratio Abundance ratio 
number  1 

count Counts 
number  1 

distance Distance 
length  m 

count_rate Count rate 
rate  s^1 

text Uncategorised text 
1 


number Uncategorised number 
1 


energy_bin_high Energy high bin edge 
J 


energy_bin_low Energy low bin edge 
energy  MeV 

energy_bin_range Energy range 
energy  MeV 

energy_density The amount of energy per unit volume. 
J*m^3 


thermal_speed For a Maxwellian distribution, the difference between the mean speed and the speed within which ~69% (one sigma) of all the members of the speed distribution occur. 
m*s^1 


epoch Epoch 
text  days 

datetime Datetime 
text  days 
Required qualifiers: format 
see_rate see_rate 
rate  s^1 

see_device_rate see_device_rate 
dimensionless  1 

position Position 
length  km 

melting_point Melting point 
temperature  K 

boiling_point Boiling point 
temperature  K 
Required qualifiers: pressure 
species_abundance Abundance ratio for a particles species 
number  1 
Required qualifiers: species 
fado omnidirectional differential alpha particle flux 
number_flux  cm^2*s^1*(MeV/nuc)^1 
Set qualifiers: form: differential direction: omnidirectional species: alpha_particle 
fadu directional differential alpha particle flux 
number_flux  cm^2*s^1*(MeV/nuc)^1*sr^1 
Set qualifiers: form: differential direction: directional species: electron 
faio omnidirectional integral alpha particle flux 
number_flux  cm^2*s^1 
Set qualifiers: form: integral direction: omnidirectional species: alpha_particle 
faiu Directional, integral, alpha particle flux 
number_flux  cm^2*s^1*sr^1 
Set qualifiers: form: integral direction: directional species: alpha_particle 
fedo omnidirectional, differential electron flux 
number_flux  cm^2*s^1*(MeV/nuc)^1 
Set qualifiers: form: differential direction: omnidirectional species: electron 
fedu directional, differential electron flux 
number_flux  cm^2*s^1*(MeV/nuc)^1*sr^1 
Set qualifiers: form: differential direction: directional species: electron 
feio omnidirectional integral electron flux 
number_flux  cm^2*s^1 
Set qualifiers: form: integral direction: omnidirectional species: electron 
feiu directional integral electron flux 
number_flux  cm^2*s^1*sr^1 
Set qualifiers: form: integral direction: directional species: electron 
fido omnidirectional differential heavy ion flux 
number_flux  cm^2*s^1*(MeV/nuc)^1 
Required qualifiers: species Set qualifiers: form: differential direction: omnidirectional 
fidu directional differential heavy ion flux 
number_flux  cm^2*s^1*(MeV/nuc)^1*sr^1 
Required qualifiers: species Set qualifiers: form: differential direction: directional 
fiio omnidirectional integral heavy ion flux 
number_flux  cm^2 s^1 
Required qualifiers: species Set qualifiers: form: integral direction: omnidirectional 
fiiu directional integral heavy ion flux 
number_flux  cm^2 s^1 sr^1 
Required qualifiers: species Set qualifiers: form: integral direction: directional 
omni_directional_4pi_differential_flux Omnidirectional differential particle flux (/4 pi) 
number_flux  m^2 s^1 sr^1 MeV^1 
Required qualifiers: species Set qualifiers: form: differential direction: omnidirectional 
omni_directional_differential_flux Omnidirectional differential particle flux 
number_flux  m^2 s^1 MeV^1 
Required qualifiers: species Set qualifiers: form: differential direction: omnidirectional 
directional_differential_flux Directional differential particle flux 
number_flux  m^2 s^1 MeV^1 sr^1 
Required qualifiers: species Set qualifiers: form: differential direction: directional 
omni_directional_4pi_integral_flux Omnidirectional integral particle flux (/4 pi) 
number_flux  m^2 s^1 sr^1 
Required qualifiers: species Set qualifiers: form: integral direction: omnidirectional 
omni_directional_integral_flux Omnidirectional integral particle flux 
number_flux  m^2 s^1 
Required qualifiers: species Set qualifiers: form: integral direction: omnidirectional 
directional_integral_flux Directional integral particle flux 
number_flux  m^2 s^1 sr^1 
Required qualifiers: species Set qualifiers: form: integral direction: directional 
directional_integral_fluence Directional integral particle fluence 
number_flux  m^2 sr^1 
Required qualifiers: species period Set qualifiers: form: integral direction: directional 
omni_directional_integral_fluence Omnidirectional integral particle fluence 
number_flux  m^2 
Required qualifiers: species period Set qualifiers: form: integral direction: omnidirectional 
directional_differential_fluence Directional differential particle fluence 
number_flux  m^2 (MeV/nuc)^1 sr^1 
Required qualifiers: species period Set qualifiers: form: differential direction: directional 
omni_directional_differential_fluence Omnidirectional differential particle fluence 
number_flux  m^2 (MeV/nuc)^1 
Required qualifiers: species period Set qualifiers: form: differential direction: omnidirectional 
fpdo omnidirectional differential proton flux 
number_flux  cm^2 s^1 (MeV/nuc)^1 
Set qualifiers: form: differential direction: omnidirectional species: proton 
fpdu directional integral proton flux 
number_flux  cm^2 s^1 (MeV/nuc)^1 sr^1 
Set qualifiers: form: integral direction: omnidirectional species: proton 
fpio Flux, proton, integral, omnidirectional 
number_flux  cm^2 s^1 
Set qualifiers: form: integral direction: omnidirectional species: proton 
fpiu directional, integral proton flux 
number_flux  cm^2 s^1 sr^1 
Set qualifiers: form: integral direction: directional species: proton 
thickness thickness 
length  m 

shield_thickness thickness 
length  m 
Required qualifiers: density 
mag_alpha pitch angle 
plane_angle  deg 

mag_l lshell 
length  re 

mag_b Magnetic flux density 
magnetic_flux_density  G 

altitude altitude 
length  km 

geodetic_latitude latitude 
plane_angle  deg 

geodetic_longitude longitude 
plane_angle  deg 

pos_x position, xcomponent 
length  km 

pos_y position, ycomponent 
length  km 

pos_z position, zcomponent 
length  km 

eph_inc inclination 
plane_angle  deg 

eph_periapsis closest point in the orbit of a planetary body 
length  km 

eph_apoapsis farthest point in the orbit of a planetary body 
length  km 

eph_raan right ascension of the ascending node 
plane_angle  deg 

eph_ta true anomaly 
plane_angle  deg 

eph_ecc eccentricity 
number  1 

eph_sma semimajoraxis 
length  km 

eph_tle1 tle line 1 
string  1 

eph_tle2 tle line 2 
string  1 

dt_duration duration in seconds 
time  s 

dt_localtime local time 
datetime  hrs 

dt_mjd modified julian date 
datetime  days 

rad_dose_rate dose rate 
absorbed_dose_rate  rad s^1 
Required qualifiers: material 
let linear energy transfer 
MeV cm^2 g^1 


niel linear energy transfer 
MeV cm^2 g^1 


see_weibull_w weibul fit width parameter 
number  MeV cm^2 mg^1 

see_weibull_s weibul fit exponent 
number  1 

see_weibull_let_th weibul fit let threshold 
MeV cm^2 mg^1 


see_weibull_sat_xsec weibull fit saturation crosssection 
area  um^2 

see_weibull_energy_th weibul fit energy threshold 
energy  MeV 

Displacement_damage_dose nonionising dose 
MeV g^1 
Required qualifiers: material 

gyrofrequency The number of gyrations around a magnetic guiding center (field line) a charged particle makes per unit time due to the Lorentz force. 
frequency  Hz 
Required qualifiers: material 
Name  Quantity  Units  Qualifiers 
Name  Columns 

stopping_power Stopping powers 
Required columns:
energy quantity: energy  rowvarying: True stopping_power quantity: stopping_power  rowvarying: True Required qualifiers: material 
secondary_emission_yield Secondary emission yield 
Required columns:
energy quantity: energy  rowvarying: True yield quantity: number  rowvarying: True 
abundance_ratio Species abundance ratio per energy 
Required columns:
abundance_ratio quantity: abundance_ratio  rowvarying: True atomic_number quantity: atomic_number  rowvarying: True energy quantity: energy  rowvarying: False 
attitude_vectors Attitude vectors 
Required columns:
number quantity: number  rowvarying: True 
coordinate_grid A grid of coordinate values. 
Required columns:
length quantity: length  rowvarying: True plane_angle quantity: plane_angle  rowvarying: True 
displacement_damage_dose_depth Displacement damage dose vs. shielding thickness 
Required columns:
displacement_damage_dose quantity: displacement_damage_dose  rowvarying: True thickness quantity: thickness  rowvarying: True 
dose_depth Dose vs. depth 
Required columns:
absorbed_dose quantity: absorbed_dose  rowvarying: True thickness quantity: thickness  rowvarying: True 
dose_dist Dose distribution 
Required columns:
absorbed_dose quantity: absorbed_dose  rowvarying: True Required qualifiers: material 
dose_map DOse map 
Required columns:
absorbed_dose quantity: absorbed_dose  rowvarying: True Required qualifiers: material plane_angle quantity: plane_angle  rowvarying: True 
dose_rate_depth Dose rate vs. depth 
Required columns:
absorbed_dose_rate quantity: absorbed_dose_rate  rowvarying: True thickness quantity: thickness  rowvarying: True 
electric_current_timeseries Timeseries of electric current 
Required columns:
electric_current quantity: electric_current  rowvarying: True epoch quantity: epoch  rowvarying: True 
electric_field_timeseries Timeseries of electric field 
Required columns:
electric_field quantity: electric_field  rowvarying: True epoch quantity: epoch  rowvarying: True 
electric_potential_timeseries Timeseries of conductivity potential 
Required columns:
electric_potential quantity: electric_potential  rowvarying: True epoch quantity: epoch  rowvarying: True 
electrical_conductivity_timeseries Timeseries of conductivity values 
Required columns:
electrical_conductivity quantity: electrical_conductivity  rowvarying: True epoch quantity: epoch  rowvarying: True 
energy_fluence_spectrum Particle energyfluence spectrum 
Required columns:
energy quantity: energy  rowvarying: True number_fluence quantity: number_fluence  rowvarying: True Required qualifiers: form species direction 
energy_flux_spectrum Particle flux spectrum 
Required columns:
energy quantity: energy  rowvarying: True number_flux quantity: number_flux  rowvarying: True Required qualifiers: form species direction 
energy_let LET v energy 
Required columns:
energy quantity: energy  rowvarying: True let quantity: let  rowvarying: True 
energy_range Energy bin range 
Required columns:
energy_bin_high quantity: energy_bin_high  rowvarying: True energy_bin_low quantity: energy_bin_low  rowvarying: True 
erosion Erosion 
Required columns:
length quantity: length  rowvarying: True 
erosion_rate Erosion rate 
Required columns:
velocity quantity: velocity  rowvarying: True 
fluence_depth Fluence vs. depth 
Required columns:
number_fluence quantity: number_fluence  rowvarying: True Required qualifiers: form species direction thickness quantity: thickness  rowvarying: True 
flux_depth Flux vs. depth 
Required columns:
number_flux quantity: number_flux  rowvarying: True Required qualifiers: form species direction thickness quantity: thickness  rowvarying: True 
energy_flux_spectrum_timeseries Timeseries of flux values 
Required columns:
epoch quantity: epoch  rowvarying: True number_flux quantity: number_flux  rowvarying: True Required qualifiers: form species direction 
energy_fluence_spectrum_timeseries Timeseries of fluence values 
Required columns:
epoch quantity: epoch  rowvarying: True number_flux quantity: number_fluence  rowvarying: True Required qualifiers: form species direction 
let_fluence_spectrum LET spectrum 
Required columns:
let quantity: let  rowvarying: True number_fluence quantity: number_fluence  rowvarying: True Required qualifiers: form species direction 
let_flux_spectrum LET spectrum 
Required columns:
let quantity: let  rowvarying: True number_flux quantity: number_flux  rowvarying: True Required qualifiers: form species direction 
magnetic_coordinates Magnetic coordinates 
Required columns:
length quantity: length  rowvarying: True magnetic_flux_density quantity: magnetic_flux_density  rowvarying: True 
mass_flux_spectrum Particle mass spectrum 
Required columns:
mass quantity: mass  rowvarying: True number_flux quantity: number_flux  rowvarying: True 
niel_energy NIEL v energy 
Required columns:
energy quantity: energy  rowvarying: True niel quantity: niel  rowvarying: True 
particle_density_timeseries Particle density timeseries 
Required columns:
epoch quantity: epoch  rowvarying: True number_flux quantity: number_flux  rowvarying: True 
pulse_height_analysis Pulse height analysis 
Required columns:
count quantity: count  rowvarying: True energy quantity: energy  rowvarying: True 
relative_degradation_depth Relative degradation vs. depth 
Required columns:
relative_degradation quantity: relative_degradation  rowvarying: True thickness quantity: thickness  rowvarying: True 
sector_file Sector file 
Required columns:
length quantity: length  rowvarying: True plane_angle quantity: plane_angle  rowvarying: True 
sector_file_dist Sector file distribution 
Required columns:
length quantity: length  rowvarying: True 
see_upset_device_rate Single event effect device upset rate 
Required columns:
number quantity: number  rowvarying: True 
see_upset_rate Single event effect upset rate 
Required columns:
see_rate quantity: see_rate  rowvarying: True 
text Uncategorised text 
Required columns:
text quantity: text  rowvarying: False 
trajectory Trajectory data consisting of rowvarying epoch and one re more rowvarying position data. 
Required columns:
datetime quantity: datetime  rowvarying: True Required qualifiers: format coordinates quantity: spherical_coordinates cartesian_coordinates 
spherical_coordinates Spherical coordinates. 
Required columns:
theta quantity: plane_angle  rowvarying: True phi quantity: plane_angle  rowvarying: True radius quantity: distance  rowvarying: True 
cartesian_coordinates Cartesian coordinates. 
Required columns:
X quantity: position  rowvarying: True Y quantity: position  rowvarying: True Z quantity: position  rowvarying: True 
Name  Required columns / quantities 
Name  Values 

coordsys Coordinate system 
Any 
material Material or substance, e.g. Silicon 
*: 
species Particle species, e.g. p, He+ 
*: 
particle_type Kind of particle 
aerosol: atom: charged_particle: dust: molecule: 
form Form of a spectrum 
integral: differential: 
direction Direction 
omnidirectional: directional: 
Name  Values 