Orbital Case 07B: Sphere with No Drag and 8x8 Gravity Model

Orbital scenario 7B tests a dragless sphere undergoing effects of an 8th order gravitational model along with third-body perturbations.


Constants and Models

This scenario uses an orbital spheroid body model, specified here. The MET atmosphere model defines atmospheric properties based on time, position, and solar effects specified here. The gravitational model order used was a 8x8 gravitational model, specified here. The geodesy model used for this scenario is the WGS-84 rotating model, specified here.


Initial Conditions

Scenario Orbital Case 07B: No Drag with 8x8 Gravity Model
Body Orbital Spheroid
Orbit Type Highly Elliptical
Atmospheric Model [1] F10.7= 128.8 10-22 watt / m2 / Hz
ap= 15.7
Time 2007/324:00:00:00 (UTC)
Duration 28,800 s
Gravitation Model Order 8x8 Gravity Gradient Effects Off
Planetary Ephemeris
Sun/Moon Perturbations		 On
On
Initial states
Aerodynamic Characteristics
 Sref (m2)
CL
CD
CY
Cl
Cm
Cn
 1.0
0.0
0.0
0.0
0.0
0.0
0.0
J2000 Position
(m)		 X Position
Y Position
Z Position 		-4,315,967.74
960,356.20
5,167,269.53
J2000 Velocity
(m/s)		 X Velocity
Y Velocity
Z Velocity 		129.091037
-7,491.513855
1,452.515654
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 [2]
Yaw Rate 		0.000000
-0.06429904441202
0.000000

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Errata

Below is the list of erratum that are relevant to changes made on this page that no longer match the report. The full list can be found on the Home Page.

[1] For each orbital IC table with the Atmospheric Model enabled replace Ap with ap: Volume II Report ↩︎

[2] Pages 70 through 92, Tables 47 through 72, row 9, column 2 each scenario that specifies an initial inertial pitch rate of -0.065 deg/s should be either -0.06499944198233 deg/s for “Nearly circular” scenarios and -0.06429904441202 deg/s for "Highly elliptical" scenarios to match the precision of the data provided: Volume II Report ↩︎