ElapsedSecs

N

Y

s

Spacecraft

Data Type: Real Number
Dependency: None

ElapsedDays

N

Y

d

Spacecraft

Data Type: Real Number
Dependency: None

A1ModJulian

Y

Y

d

Spacecraft orbit epoch in the A.1 system and the Modified Julian format.

Data Type: Real Number
Dependency: None

A1Gregorian

Y

N

N/A

Spacecraft orbit epoch in the A.1 system and the Gregorian format.

Data Type: String
Dependency: None

TAIModJulian

Y

Y

d

Spacecraft orbit epoch in the TAI system and the Modified Julian format.

Data Type: Real Number
Dependency: None

TAIGregorian

Y

N

N/A

The spacecraft orbit epoch in the TAI system and the Gregorian format.

Data Type: String
Dependency: None

TTModJulian

Y

Y

d

The spacecraft orbit epoch in the TT system and the Modified Julian format.

Data Type: Real Number
Dependency: None

TTGregorian

Y

N

N/A

Spacecraft orbit epoch in the TT system and the Gregorian format.

Data Type: String
Dependency: None

TDBModJulian

Y

Y

d

Spacecraft orbit epoch in the TDB system and the Modified Julian format.

Data Type: Real Number
Dependency: None

TDBGregorian

Y

N

N/A

Spacecraft orbit epoch in the TDB system and the Gregorian format.

Data Type: String
Dependency: None

UTCModJulian

Y

Y

d

Spacecraft orbit epoch in the UTC system and the Modified Julian format.

Data Type: Real Number
Dependency: None

UTCGregorian

Y

N

N/A

Spacecraft orbit epoch in the UTC system and the Gregorian format.

Data Type: String
Dependency: None

X

Y

Y

km

Cartesian x-component of the spacecraft position.

Data Type: Real Number
Dependency: Coordinate System

Y

Y

Y

km

Cartesian y-component of the spacecraft position.

Data Type: Real Number
Dependency: Coordinate System

Z

Y

Y

km

Cartesian z-component of the spacecraft position.

Data Type: Real Number
Dependency: Coordinate System

VX

Y

Y

km/s

Cartesian x-component of the spacecraft velocity.

Data Type: Real Number
Dependency: Coordinate System

VY

Y

Y

km/s

Cartesian y-component of the spacecraft velocity.

Data Type: Real Number
Dependency: Coordinate System

VZ

Y

Y

km/s

Cartesian z-component of the spacecraft velocity.

Data Type: Real Number
Dependency: Coordinate System

SMA

Y

Y

km

Orbit semi-major axis.

Data Type: Real Number
Dependency: Celestial Body

ECC

Y

Y

N/A

Orbit eccentricity.

Data Type: Real Number
Dependency: Celestial Body

INC

Y

Y

°

Orbit inclination.

Data Type: Real Number
Dependency: Coordinate System

RAAN

Y

Y

°

Orbit right ascension of the ascending node.

Data Type: Real Number
Dependency: Coordinate System

AOP

Y

Y

°

Orbit argument of periapsis.

Data Type: Real Number
Dependency: Coordinate System

TA

Y

Y

°

True anomaly.

Data Type: Real Number
Dependency: Celestial Body

MA

Y

Y

°

Mean anomaly.

Data Type: Real Number
Dependency: Celestial Body

EA

Y

Y

°

Eccentric anomaly.

Data Type: Real Number
Dependency: Celestial Body

HA

Y

Y

°

Hyperbolic anomaly.

Data Type: Real Number
Dependency: Celestial Body

MM

N

Y

rad/s

Mean motion.

Data Type: Real Number
Dependency: Celestial Body

VelApoapsis

N

Y

km/s

Scalar velocity at apoapsis.

Data Type: Real Number
Dependency: Celestial Body

VelPeriapsis

N

Y

km/s

Scalar velocity at periapsis.

Data Type: Real Number
Dependency: Celestial Body

Apoapsis

N

Y

N/A

A parameter that equals zero when the spacecraft is at orbit apoapsis. This parameter is intended to be used as a stopping condition in the Propagate command.

Data Type: Real Number
Dependency: Celestial Body

Periapsis

N

Y

N/A

A parameter that equals zero when the spacecraft is at orbit periapsis. This parameter is intended to be used as a stopping condition in the Propagate command.

Data Type: Real Number

Dependency: Celestial Body

OrbitPeriod

N

Y

s

Osculating orbit period.

Data Type: Real Number

Dependency: Celestial Body

RadApo

Y

Y

km

Radius of apoapsis.

Data Type: Real Number

Dependency: Celestial Body

RadPer

Y

Y

km

Radius of periapsis.

Data Type: Real Number

Dependency: Celestial Body

C3Energy

N

Y

MJ/kg (km²/s²)

C₃ (characteristic) energy.

Data Type: Real Number

Dependency: Celestial Body

Energy

N

Y

MJ/kg (km²/s²)

Specific orbital energy.

Data Type: Real Number

Dependency: Celestial Body

RMAG

Y

Y

km

Magnitude of the orbital position vector.

Data Type: Real Number

Dependency: Celestial Body

RA

Y

Y

°

Right ascension of the orbital position.

Data Type: Real Number

Dependency: Coordinate System

DEC

Y

Y

°

Declination of the orbital position.

Data Type: Real Number

Dependency: Coordinate System

VMAG

Y

Y

km/s

Magnitude of the orbital velocity vector.

Data Type: Real Number

Dependency: Coordinate System

RAV

Y

Y

°

Right ascension of orbital velocity.

Data Type: Real Number

Dependency: Coordinate System

DECV

Y

Y

°

Declination of orbital velocity.

Data Type: Real Number

Dependency: Coordinate System

AZI

Y

Y

°

Orbital velocity azimuth.

Data Type: Real Number

Dependency: Coordinate System

FPA

Y

Y

°

Orbital flight path angle.

Data Type: Real Number

Dependency: Coordinate System

SemilatusRectum

N

Y

km

Semilatus rectum of the osculating orbit.

Data Type: Real Number

Dependency: Celestial Body

HMAG

N

Y

km²/s

Magnitude of the angular momentum vector.

Data Type: Real Number

Dependency: Celestial Body

HX

N

Y

km²/s

X component of the angular momentum vector.

Data Type: Real Number

Dependency: Coordinate System

HY

N

Y

km²/s

Y component of the angular momentum vector.

Data Type: Real Number

Dependency: Coordinate System

HZ

N

Y

km²/s

Z component of the angular momentum vector.

Data Type: Real Number

Dependency: Coordinate System

DLA

N

Y

°

Declination of the outgoing hyperbolic asymptote.

Data Type: Real Number

Dependency: Coordinate System

RLA

N

Y

°

Right ascension of the outgoing hyperbolic asymptote.

Data Type: Real Number

Dependency: Coordinate System

Altitude

N

Y

km

Distance to the plane tangent to the surface of the specified celestial body at the sub-satellite point. GMAT assumes the body is an ellipsoid.

Data Type: Real Number

Dependency: Celestial Body

MHA

N

Y

°

Greenwich hour angle.

Data Type: Real Number

Dependency: Celestial Body

Longitude

N

Y

°

Planetodetic longitude.

Data Type: Real Number

Dependency: Celestial Body

Latitude

N

Y

°

Planetodetic latitude.

Data Type: Real Number

Dependency: Celestial Body

LST

N

Y

°

Local sidereal time.

Data Type: Real Number

Dependency: Celestial Body

BetaAngle

N

Y

°

Beta angle (or phase angle) between the orbit normal vector and the vector from the celestial body to the sun.

Data Type: Real Number

Dependency: Celestial Body

BdotT

N

Y

km

B-plane B·T magnitude.

Data Type: Real Number

Dependency: Coordinate System

BdotR

N

Y

km

B-plane B·R magnitude.

Data Type: Real Number

Dependency: Coordinate System

BVectorMag

N

Y

km

B-plane B vector magnitude.

Data Type: Real Number

Dependency: Coordinate System

BVectorAngle

N

Y

°

B-plane angle between the B vector and the T unit vector.

Data Type: Real Number

Dependency: Coordinate System

DCM11

Y

Y

(None)

Element (1,1) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM12

Y

Y

(None)

Element (1,2) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM13

Y

Y

(None)

Element (1,3) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM21

Y

Y

(None)

Element (2,1) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM22

Y

Y

(None)

Element (2,2) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM23

Y

Y

(None)

Element (2,3) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM31

Y

Y

(None)

Element (3,1) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM32

Y

Y

(None)

Element (3,2) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

DCM33

Y

Y

(None)

Element (3,3) of the attitude direction cosine matrix.

Data Type: Real Number

Dependency: (None)

EulerAngle1

Y

Y

°

Attitude Euler angle 1.

Data Type: Real Number

Dependency: (None)

EulerAngle2

Y

Y

°

Attitude Euler angle 2.

Data Type: Real Number

Dependency: (None)

EulerAngle3

Y

Y

°

Attitude Euler angle 3.

Data Type: Real Number

Dependency: (None)

MRP1

Y

Y

(None)

Attitude modified Rodrigues parameter 1.

Data Type: Real Number

Dependency: (None)

MRP2

Y

Y

(None)

Attitude modified Rodrigues parameter 2.

Data Type: Real Number

Dependency: (None)

MRP3

Y

Y

(None)

Attitude modified Rodrigues parameter 3.

Data Type: Real Number

Dependency: (None)

Q1

N

Y

(None)

Attitude quaternion element 1 (a).

Data Type: Real Number

Dependency: (None)

Q2

N

Y

(None)

Attitude quaternion element 2 (b).

Data Type: Real Number

Dependency: (None)

Q3

N

Y

(None)

Attitude quaternion element 3 (c).

Data Type: Real Number

Dependency: (None)

Q4

N

Y

(None)

Attitude quaternion element 4 (d).

Data Type: Real Number

Dependency: (None)

Quaternion

Y

N

(None)

Attitude quaternion.

Data Type: Array (1×4)

Dependency: (None)

AngularVelocityX

Y

Y

°/s

X component of the attitude angular velocity vector.

Data Type: Real Number

Dependency: (None)

AngularVelocityY

Y

Y

°/s

Y component of the attitude angular velocity vector.

Data Type: Real Number

Dependency: (None)

AngularVelocityZ

Y

Y

°/s

Z component of the attitude angular velocity vector.

Data Type: Real Number

Dependency: (None)

EulerAngleRate1

Y

Y

°/s

Rate of attitude Euler angle 1.

Data Type: Real Number

Dependency: (None)

EulerAngleRate2

Y

Y

°/s

Rate of attitude Euler angle 2.

Data Type: Real Number

Dependency: (None)

EulerAngleRate3

Y

Y

°/s

Rate of attitude Euler angle 3.

Data Type: Real Number

Dependency: (None)

DryMass

Y

Y

kg

Dry mass (without propellant).

Data Type: Real Number

Dependency: (None)

Cd

Y

Y

(None)

Coefficient of drag.

Data Type: Real Number

Dependency: (None)

Cr

Y

Y

(None)

Coefficient of reflectivity.

Data Type: Real Number

Dependency: (None)

DragArea

Y

Y

m²

Area used to compute acceleration due to atmospheric drag.

Data Type: Real Number

Dependency: (None)

SRPArea

Y

Y

m²

Area used to compute acceleration due to solar radiation pressure.

Data Type: Real Number

Dependency: (None)

TotalMass

N

Y

kg

Total mass, including fuel mass from attached Fuel Tank resources.

Data Type: Real Number

Dependency: (None)

OrbitSTM

N

N

(None)

State transition matrix.

Data Type: Array (6×6)

Dependency: Coordinate System

OrbitSTMA

N

N

(None)

Upper-left quadrant of the state transition matrix.

Data Type: Array (3×3)

Dependency: Coordinate System

OrbitSTMB

N

N

(None)

Upper-right quadrant of the state transition matrix.

Data Type: Array (3×3)

Dependency: Coordinate System

OrbitSTMC

N

N

(None)

Lower-left quadrant of the state transition matrix.

Data Type: Array (3×3)

Dependency: Coordinate System

OrbitSTMD

N

N

(None)

Lower-right quadrant of the state transition matrix.

Data Type: Array (3×3)

Dependency: Coordinate System

FuelMass

Y

Y

kg

Mass of fuel in the tank.

Data Type: Real Number

Dependency: (None)

Volume

Y

Y

m³

Volume of the tank. GMAT checks to ensure that the input volume of the tank is larger than the calculated volume of fuel loaded in the tank and throws an exception in the case that the calculated fuel volume is larger than the input tank volume.

Data Type: Real Number

Dependency: (None)

FuelDensity

Y

Y

kg/m³

Density of the fuel.

Data Type: Real Number

Dependency: (None)

Pressure

Y

Y

kPa

Pressure in the tank.

Data Type: Real Number

Dependency: (None)

Temperature

Y

Y

°C

Temperature of the fuel and ullage in the tank. GMAT currently assumes ullage and fuel are always at the same temperature.

Data Type: Real Number

Dependency: (None)

RefTemperature

Y

Y

°C

The temperature of the tank when fuel was loaded.

Data Type: Real Number

Dependency: (None)

DutyCycle

Y

Y

 (None)

Fraction of time that the thrusters are on during a maneuver. The thrust applied to the spacecraft is scaled by this amount. Note that this scale factor also affects mass flow rate.

Data Type: Real Number
Dependency: (None)

ThrustScaleFactor

Y

Y

 (None)

Scale factor that is multiplied by the thrust vector, for a given thruster, before the thrust vector is added into the total acceleration. Note that the value of this scale factor does not affect the mass flow rate.

Data Type: Real Number
Dependency: (None)

GravitationalAccel

Y

Y

 m/s²

Value of the gravitational acceleration used for the FuelTank/Thruster calculations.

Data Type: Real Number
Dependency: (None)

C1

Y

Y

Thrust coefficient C₁.

Data Type: Real Number
Dependency: (None)

C2

Y

Y

Thrust coefficient C₂.

Data Type: Real Number
Dependency: (None)

C3

Y

Y

Thrust coefficient C₃.

Data Type: Real Number
Dependency: (None)

C4

Y

Y

Thrust coefficient C₄.

Data Type: Real Number
Dependency: (None)

C5

Y

Y

Thrust coefficient C₅.

Data Type: Real Number
Dependency: (None)

C6

Y

Y

N/kPa^C₇

Thrust coefficient C₆.

Data Type: Real Number
Dependency: (None)

C7

Y

Y

Thrust coefficient C₇.

Data Type: Real Number
Dependency: (None)

C8

Y

Y

Thrust coefficient C₈.

Data Type: Real Number
Dependency: (None)

C9

Y

Y

Thrust coefficient C₉.

Data Type: Real Number
Dependency: (None)

C10

Y

Y

Thrust coefficient C₁₀.

Data Type: Real Number
Dependency: (None)

C11

Y

Y

Thrust coefficient C₁₁.

Data Type: Real Number
Dependency: (None)

C12

Y

Y

Thrust coefficient C₁₂.

Data Type: Real Number
Dependency: (None)

C13

Y

Y

Thrust coefficient C₁₃.

Data Type: Real Number
Dependency: (None)

C14

Y

Y

Thrust coefficient C₁₄.

Data Type: Real Number
Dependency: (None)

C15

Y

Y

Thrust coefficient C₁₅.

Data Type: Real Number
Dependency: (None)

C16

Y

Y

Thrust coefficient C₁₆.

Data Type: Real Number
Dependency: (None)

K1

Y

Y

I_^sp coefficient K₁.

Data Type: Real Number
Dependency: (None)

K2

Y

Y

I_^sp coefficient K₂.

Data Type: Real Number
Dependency: (None)

K3

Y

Y

I_^sp coefficient K₃.

Data Type: Real Number
Dependency: (None)

K4

Y

Y

I_^sp coefficient K₄.

Data Type: Real Number
Dependency: (None)

K5

Y

Y

I_^sp coefficient K₅.

Data Type: Real Number
Dependency: (None)

K6

Y

Y

I_^sp coefficient K₆.

Data Type: Real Number
Dependency: (None)

K7

Y

Y

I_^sp coefficient K₇.

Data Type: Real Number
Dependency: (None)

K8

Y

Y

I_^sp coefficient K₈.

Data Type: Real Number
Dependency: (None)

K9

Y

Y

I_^sp coefficient K₉.

Data Type: Real Number
Dependency: (None)

K10

Y

Y

I_^sp coefficient K₁₀.

Data Type: Real Number
Dependency: (None)

K11

Y

Y

I_^sp coefficient K₁₁.

Data Type: Real Number
Dependency: (None)

K12

Y

Y

I_^sp coefficient K₁₂.

Data Type: Real Number
Dependency: (None)

K13

Y

Y

I_^sp coefficient K₁₃.

Data Type: Real Number
Dependency: (None)

K14

Y

Y

I_^sp coefficient K₁₄.

Data Type: Real Number
Dependency: (None)

K15

Y

Y

I_^sp coefficient K₁₅.

Data Type: Real Number
Dependency: (None)

K16

Y

Y

I_^sp coefficient K₁₆.

Data Type: Real Number
Dependency: (None)

ThrustDirection1

Y

Y

ThrustDirection1, divided by the RSS of the three direction components, forms the x component of the spacecraft thrust vector direction.

Data Type: Real Number
Dependency: (None)

ThrustDirection2

Y

Y

ThrustDirection2, divided by the RSS of the three direction components, forms the y component of the spacecraft thrust vector direction.

Data Type: Real Number
Dependency: (None)

ThrustDirection3

Y

Y

ThrustDirection3, divided by the RSS of the three direction components, forms the z component of the spacecraft thrust vector direction.

Data Type: Real Number
Dependency: (None)

Element1

X-component of the applied impulsive burn (delta-V).

Data Type: Real Number
Dependency: (None)

Element2

Y-component of the applied impulsive burn (delta-V).

Data Type: Real Number
Dependency: (None)

Element3

Z-component of the applied impulsive burn (delta-V).

Data Type: Real Number
Dependency: (None)

V

Deprecated. Velocity component of the applied impulsive burn (delta-V).

Data Type: Real Number
Dependency: (None)

N

Deprecated. Normal component of the applied impulsive burn (delta-V).

Data Type: Real Number
Dependency: (None)

B

Deprecated. Binormal component of the applied impulsive burn (delta-V).

Data Type: Real Number
Dependency: (None)