## L1 EarthMoon Near Rectilinear Orbit

Dynamics and environment models, spacecraft model, solver algorithms, etc.

### L1 EarthMoon Near Rectilinear Orbit

Dear all,
I am a university student and I want simulate a near rectilinear orbit (NRO) in Earth-Moon system. I set the propagator in Three-Body Problem (point masses: Earth, Moon) and then I put the initial conditions. I'm sure about initial condition, but I think there is wrong something in mission set up. Can someone help me? Below you can see the code.
Code: Select all
`%----------------------------------------%---------- User-Defined Calculated Points%----------------------------------------Create LibrationPoint EarthMoonL1;GMAT EarthMoonL1.OrbitColor = GreenYellow;GMAT EarthMoonL1.TargetColor = [32 254 254];GMAT EarthMoonL1.Primary = Earth;GMAT EarthMoonL1.Secondary = Luna;GMAT EarthMoonL1.Point = L1;%----------------------------------------%---------- Spacecraft%----------------------------------------Create Spacecraft Sat;GMAT Sat.DateFormat = TTGregorian;GMAT Sat.Epoch = '01 Jul 2020 00:01:09.184';GMAT Sat.CoordinateSystem = MoonRotFrame;GMAT Sat.DisplayStateType = Cartesian;GMAT Sat.X = 16003.9582;GMAT Sat.Y = 0.008493173987517366;GMAT Sat.Z = 71821.86109999999;GMAT Sat.VX = -0.001143739999999956;GMAT Sat.VY = 0.1202071119999999;GMAT Sat.VZ = 0.01182962700000003;GMAT Sat.DryMass = 850;GMAT Sat.Cd = 2.2;GMAT Sat.Cr = 1.8;GMAT Sat.DragArea = 15;GMAT Sat.SRPArea = 1;GMAT Sat.NAIFId = -10000001;GMAT Sat.NAIFIdReferenceFrame = -9000001;GMAT Sat.OrbitColor = [251 2 254];GMAT Sat.TargetColor = Teal;GMAT Sat.OrbitErrorCovariance = [ 1e+70 0 0 0 0 0 ; 0 1e+70 0 0 0 0 ; 0 0 1e+70 0 0 0 ; 0 0 0 1e+70 0 0 ; 0 0 0 0 1e+70 0 ; 0 0 0 0 0 1e+70 ];GMAT Sat.CdSigma = 1e+70;GMAT Sat.CrSigma = 1e+70;GMAT Sat.Id = 'SatId';GMAT Sat.Attitude = CoordinateSystemFixed;GMAT Sat.SPADSRPScaleFactor = 1;GMAT Sat.ModelFile = 'aura.3ds';GMAT Sat.ModelOffsetX = 0;GMAT Sat.ModelOffsetY = 0;GMAT Sat.ModelOffsetZ = 0;GMAT Sat.ModelRotationX = 0;GMAT Sat.ModelRotationY = 0;GMAT Sat.ModelRotationZ = 0;GMAT Sat.ModelScale = 1;GMAT Sat.AttitudeDisplayStateType = 'Quaternion';GMAT Sat.AttitudeRateDisplayStateType = 'AngularVelocity';GMAT Sat.AttitudeCoordinateSystem = EarthMJ2000Eq;GMAT Sat.EulerAngleSequence = '321';%----------------------------------------%---------- ForceModels%----------------------------------------Create ForceModel EarthMoonProp_ForceModel;GMAT EarthMoonProp_ForceModel.CentralBody = Earth;GMAT EarthMoonProp_ForceModel.PointMasses = {Earth, Luna};GMAT EarthMoonProp_ForceModel.Drag = None;GMAT EarthMoonProp_ForceModel.SRP = On;GMAT EarthMoonProp_ForceModel.RelativisticCorrection = Off;GMAT EarthMoonProp_ForceModel.ErrorControl = RSSStep;GMAT EarthMoonProp_ForceModel.SRP.Flux = 1367;GMAT EarthMoonProp_ForceModel.SRP.SRPModel = Spherical;GMAT EarthMoonProp_ForceModel.SRP.Nominal_Sun = 149597870.691;%----------------------------------------%---------- Propagators%----------------------------------------Create Propagator EarthMoonProp;GMAT EarthMoonProp.FM = EarthMoonProp_ForceModel;GMAT EarthMoonProp.Type = RungeKutta89;GMAT EarthMoonProp.InitialStepSize = 60;GMAT EarthMoonProp.Accuracy = 9.999999999999999e-12;GMAT EarthMoonProp.MinStep = 0.001;GMAT EarthMoonProp.MaxStep = 2700;GMAT EarthMoonProp.MaxStepAttempts = 50;GMAT EarthMoonProp.StopIfAccuracyIsViolated = true;...%----------------------------------------%---------- Mission Sequence%----------------------------------------BeginMissionSequence;Propagate EarthMoonProp(Sat, 'STM') {Sat.ElapsedSecs = 313340};`
PabloPi

Posts: 1
Joined: Fri Jul 06, 2018 9:26 am

### Re: L1 EarthMoon Near Rectilinear Orbit

The assignment has been completed for the future courses. It’s been mild and do my assignment australia in the ambit of the regulation for the persons and all issues for the candidates.
xekykejele

Posts: 1
Joined: Tue Nov 06, 2018 5:01 pm

### Re: L1 EarthMoon Near Rectilinear Orbit

I set the propagator in Three-Body Problem (point masses: Earth, Moon) Credit Card Processing and then I put the initial conditions. I'm sure about initial condition, but I think there is wrong something in mission set up. Can someone help me? Below you can see the code.
William12

Posts: 1
Joined: Mon Dec 17, 2018 8:16 am

### Re: L1 EarthMoon Near Rectilinear Orbit

I am a university student and I want simulate eye doctor near me on friday a near rectilinear orbit (NRO) in Earth-Moon system.
Richardmswanson

Posts: 1
Joined: Sat Jan 12, 2019 6:29 am

### Re: L1 EarthMoon Near Rectilinear Orbit

Hi there! I think that this problem must be solved by professionals who work with the codes. How did you sort it out?
matthewbaron

Posts: 1
Joined: Wed Apr 17, 2019 11:37 am