Orbital Case 09A: ISS Being Torqued with Zero Initial Rates

Orbital scenario 9A tests an idealized International Space Station with zero initial inertial rotation rates while having a 10 N-m torque (positive body x-axis) applied at t = 1,000 sec for a duration of 1,000 sec.


Constants and Models

This scenario uses an idealized International Space Station vehicle model, specified here. The MET atmosphere model defines atmospheric properties based on time, position, and solar effects specified here. The gravitational model used was an inverse-square gravitation field, specified here. The geodesy model used for this scenario is the WGS-84 rotating model, specified here.


Initial Conditions

Scenario Orbital Case 09A: Zero Initial Attitude Rate with Torque
Vehicle ISS
Orbit Type Nearly Circular
Atmospheric Model Off
Time 2007/324:00:00:00 (UTC)
Duration 28,800 s
Gravitation Model Order Inverse Square Gravity Gradient Effects Off
Planetary Ephemeris
Sun/Moon Perturbations		 Off
Off
Initial states
Aerodynamic Characteristics
 Sref (m2)
CL
CD
CY
Cl
Cm
Cn
 1,400
0.0
0.0
0.0
0.0
0.0
0.0
J2000 Position
(m)		 X Position
Y Position
Z Position 		-4,292,653.41
955,168.47
5,139,356.57
J2000 Velocity
(m/s)		 X Velocity
Y Velocity
Z Velocity 		109.649663
-7,527.726490
1,484.521489
Attitude (LVLH)
(deg)
(3-2-1 Sequence)		 Roll
Pitch
Yaw 		0.000000
-11.600000
0.000000
Inertial Rotation Rate (Body Axes)
(deg/s)		 Roll Rate
Pitch Rate
Yaw Rate 		0.000000
0.000000
0.000000

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