STK Object Model Unit Preferences

Description

The following table provides information on unit preferences for the STK Object Model.

Type of Unit Information
DistanceUnit

Default Unit abbrv = km

Dimension Id = 0

Available Units
     Feet (ft)
     Statute Miles (mi)
     Nautical Miles (nm)
     Meters (m)
     Kilometers (km)
     Astronomical Units (Au)
     Earth Radii (Re)
     Kilofeet (kft)
     Meter Square Roots (sqrtm)
     Furlong (fur)
     Fathom (fm)
     League (leag)

TimeUnit

Default Unit abbrv = sec

Dimension Id = 1

Available Units
     Seconds (sec)
     Minutes (min)
     Hours (hr)
     Days (day)
     Centidays (cd)
     Earth Canonical Time (EarthTU)
     Sun Canonical Time (SunTU)
     Fortnight (FN)
     Years (yr)

DateFormat

Default Unit abbrv = UTCG

Dimension Id = 2

Available Units
     Epoch Seconds (EpSec)
     Epoch Minutes (EpMin)
     Epoch Hours (EpHr)
     Epoch Days (EpDay)
     Epoch Years (EpYr)
     Gregorian LCL (LCLG)
     Gregorian UTC (UTCG)
     Julian LCL (LCLJ)
     Julian UTC (UTCJ)
     YYDDD.ddd (YYDDD)
     Julian4 UTC (UTCJFOUR)
     Julian Date (JDate)
     YYYYDDD.hhmmss (YYYYDDD)
     Jul Date Offset (JDateOff)
     Mission Elapsed (MisElap)
     YYYYMMDD.ddd (YYYYMMDD)
     YYYY/MM/DD Time (YYYY/MM/DD)
     ISO-YD
     ISO-YMD
     GMT System (GMT)
     Modified Julian Date (ModJDate)
     Julian Ephemeris Date (JED)
     Gregorian TDT (TDTG)
     Gregorian TAI (TAIG)
     Julian TAI (TAIJ)
     Gregorian GPS Time (GPSG)
     GPS Time (GPS)
     DD/MM/YYYY Time (DD/MM/YYYY)
     Earth Canonical Time (EarthEpTU)
     Sun Canonical Time (SunEpTU)
     YYYY:MM:DD:HH:MM:SS.sss Time (YYYY:MM:DD)
     GPS Z Count (GPSZ)
     Gregorian TDB (TDBG)

AngleUnit

Default Unit abbrv = deg

Dimension Id = 3

Available Units
     Degrees (deg)
     Radians (rad)
     Arc Seconds (arcSec)
     Arc Minutes (arcMin)
     Deg:Min:Sec (DMS)
     Hr:Min:Sec (HMS)
     Seconds Of Arc (secArc)*
     Seconds of Time (secTime)
     MilliRadian (mrad)
     MicroRadian (urad)
     Revolution (revs)
     Semicircle (semiC)
     MilliDegree (mdeg)

MassUnit

Default Unit abbrv = kg

Dimension Id = 8

Available Units
     Kilograms (kg)
     Pounds (lb)
     Slugs (slug)
     Milligrams (mg)
     Grams (g)

PowerUnit

Default Unit abbrv = dBW

Dimension Id = 9

Available Units
     Attowatts (aW)
     Femtowatts (fW)
     Picowatts (pW)
     Nanowatts (nW)
     Microwatts (uW)
     Milliwatts (mW)
     Watts (W)
     Kilowatts (KW)
     Megawatts (MegW)
     Gigawatts (GW)
     Terawatts (TW)
     dBpW (dBpW)
     dBnW (dBnW)
     dBuW (dBuW)
     dBm (dBm)
     dBW (dBW)
FrequencyUnit

Default Unit abbrv = GHz

Dimension Id = 10

Available Units
     Hertz (Hz)
     Kilohertz (KHz)
     Megahertz (MHz)
     Gigahertz (GHz)
     Terahertz (THz)
SmallDistanceUnit

Default Unit abbrv = m

Dimension Id = 18

Available Units
     Inches (in)
     Centimeters (cm)
     Millimeters (mm)
     Microns (um)
     Nanometers (nanom)
     Meters (m)
     Feet (ft)

LatitudeUnit

Default Unit abbrv = deg

Dimension Id = 19

Available Units
     Degrees (deg)
     Radians (rad)
     Deg:Min:Sec (DMS)
     Hr:Min:Sec (HMS)
     Deg:Min:Sec_Dir (DMS_Lat)
LongitudeUnit

Default Unit abbrv = deg

Dimension Id = 20

Available Units
     Degrees (deg)
     Radians (rad)
     Deg:Min:Sec (DMS)
     Hr:Min:Sec (HMS)
     Degree 0 to 360 (degEast)
     Degree -180 to 180 (degEastWest)
     Deg:Min:Sec_Dir (DMS_Lon)
DurationUnit

Default Unit abbrv = HMS

Dimension Id = 21

Available Units
     Seconds (sec)
     Hr:Min:Sec (HMS)
Temperature

Default Unit abbrv = K

Dimension Id = 22

Available Units
     Celsius (degC)
     Fahrenheit (degF)
     Kelvin (K)

SmallTimeUnit

Default Unit abbrv = sec

Dimension Id = 23

Available Units
     Seconds (sec)
     Milliseconds (msec)
     Microseconds (usec)
     Nanoseconds (nsec)
     Picoseconds (psec)
RatioUnit

Default Unit abbrv = dB

Dimension Id = 24

Available Units
     Units (units)
     Decibel (dB)
RcsUnit

Default Unit abbrv = dBsm

Dimension Id = 25

Available Units
     Square Meters (sqm)
     Decibel (dBsm)

DopplerVelocityUnit

Default Unit abbrv = m/s

Dimension Id = 26

Available Units
     Meters per Second (m/s)
     Feet per Second (fps)
     Kilometers per Hour (kph)
     Nautical Miles per Hour (kts)
     Statute Miles per Hour (mph)
SARTimeResProdUnit

Default Unit abbrv = m-sec

Dimension Id = 27

Available Units
     Meter-Second (m-sec)
     Meter-Millisecond (m-msec)

ForceUnit

Default Unit abbrv = N

Dimension Id = 30

Available Units
     Newtons (N)
     Kilonewtons (kN)
     Pounds (lbf)
     Millinewtons (mN)
PressureUnit

Default Unit abbrv = Pa

Dimension Id = 31

Available Units
     Pascals (Pa)
     Kilopascals (kPa)
     Pounds per square inch (Psi)
     Millibars (mbar)

SpecificImpulseUnit

Default Unit abbrv = s

Dimension Id = 32

Available Units
     Seconds (s)
PRFUnit

Default Unit abbrv = KHz

Dimension Id = 44

Available Units
     Hertz (Hz)
     Kilohertz (KHz)
     Megahertz (MHz)
BandwidthUnit

Default Unit abbrv = MHz

Dimension Id = 45

Available Units
     Hertz (Hz)
     Kilohertz (KHz)
     Megahertz (MHz)
     Gigahertz (GHz)

SmallVelocityUnit

Default Unit abbrv = cm/s

Dimension Id = 49

Available Units
     Inches per Second (in/s)
     Centimeters per Second (cm/s)
     Millimeters per Second (mm/s)
     Meters per Second (m/s)
     Feet per Second (fps)
Percent

Default Unit abbrv = %

Dimension Id = 54

Available Units
     UnitValue (unitValue)
     Percentage (%)

MissionModelerDistanceUnit

Default Unit abbrv = nm

Dimension Id = 60

Available Units
     Feet (ft)
     Kilofeet (kft)
     Meters (m)
     Kilometers (km)
     Statute Miles (mi)
     Nautical Miles (nm)
MissionModelerTimeUnit

Default Unit abbrv = hr

Dimension Id = 61

Available Units
     Seconds (sec)
     Minutes (min)
     Hours (hr)

MissionModelerAltitudeUnit

Default Unit abbrv = ft

Dimension Id = 63

Available Units
     Feet (ft)
     Kilofeet (kft)
     Meters (m)
     Kilometers (km)
     Statute Miles (mi)
     Nautical Miles (nm)
MissionModelerFuelQuantityUnit

Default Unit abbrv = lb

Dimension Id = 65

Available Units
     Pounds (lb)
     Kilograms (kg)

MissionModelerRunwayLengthUnit

Default Unit abbrv = kft

Dimension Id = 67

Available Units
     Feet (ft)
     Kilofeet (kft)
     Meters (m)
     Kilometers (km)
     Statute Miles (mi)
     Nautical Miles (nm)

MissionModelerBearingAngleUnit

Default Unit abbrv = deg

Dimension Id = 68

Available Units
     Radians (rad)
     Degrees (deg)
     Hr:Min:Sec (HMS)
     Deg:Min:Sec (DMS)
MissionModelerAngleOfAttackUnit

Default Unit abbrv = deg

Dimension Id = 69

Available Units
     Radians (rad)
     Degrees (deg)
     Hr:Min:Sec (HMS)
     Deg:Min:Sec (DMS)

MissionModelerAttitudeAngleUnit

Default Unit abbrv =deg

Dimension Id = 70

Available Units
     Radians (rad)
     Degrees (deg)
     Hr:Min:Sec (HMS)
     Deg:Min:Sec (DMS)

MissionModelerGUnit

Default Unit abbrv = G-SeaLevel

Dimension Id = 72

Available Units
     Standard Sea Level G (G-SeaLevel)
SolidAngle

Default Unit abbrv = Sterad

Dimension Id = 73

Available Units
     Steradians (Sterad)
     Milli Steradians (mSterad)
     Micro Steradians (uSterad)
     Nano Steradians (nSterad)
     Spheres (Spheres)
     Hemispheres (HemiSphere)
     Quarterspheres (QuartSphere)
     SphericalRightAngle (SphRightAng)
     SphericalDegrees (SphDeg)
     Square Degrees (SqrDeg)
     Square Grades (SqrGrade)

MissionModelerTSFCUnit

Default Unit abbrv = lbm/hr/lbf

Dimension Id = 77

Available Units
     TSFC LbmHrLbf (lbm/hr/lbf)
     TSFC LbmSecLbf (lbm/sec/lbf)
     TSFC KgHrN (kg/hr/N)
     TSFC KgSecN (kg/sec/N)
MissionModelerPSFCUnit

Default Unit abbrv = lbm/hr/hp

Dimension Id = 78

Available Units
     PSFC LbmHrHp (lbm/hr/hp)
     PSFC LbmSecHp (lbm/sec/hp)
     PSFC KgHrW (kg/hr/W)
     PSFC KgSecW (kg/sec/W)

MissionModelerForceUnit

Default Unit abbrv = lbf

Dimension Id = 79

Available Units
     Newtons (N)
     Kilonewtons (kN)
     Pounds (lbf)
     Kilogram Force (kgf)
MissionModelerPowerUnit

Default Unit abbrv = hp

Dimension Id = 80

Available Units
     FlightWatt (Watt)
     FlightKilowatt (KWatt)
     Horsepower (hp)

SpectralBandwidthUnit

Default Unit abbrv= Hz

Dimension Id = 93

Available Units
     Hertz (Hz)

BitsUnit

Default Unit abbrv = Mb

Dimension Id = 160

Available Units
     BitsPerSecond (b)
     KiloBitsPerSecond (kb)
     MegaBitsPerSecond (Mb)
     GigaBitsPerSecond (Gb)
     TeraBitsPerSecond (Tb)

MagneticFieldUnit

Default Unit abbrv = nT

Dimension Id = 1005

Available Units
     Tesla (T)
     Gauss (gauss)
     nanoTesla (nT)
     MilliGauss (mGauss)

* Seconds of Arc has been deprecated in STK 9.1 and should be replaced with Seconds of Time (secTime); Seconds of Arc remains valid for the purpose of backward compatibility.