Path: Orbit/OrbitMechanics
% Compute the drag loss over an orbit arc in planetary orbit. All the built in constants are for the Earth. If no outputs are specified it will plot the drag acceleration. This function assumes that the velocity remains that of the unperturbed orbit. This approximation is only valid when the drag loss is low or there is a drag makeup system in operation. The planets are limited by the ones available in AtmDens1 which are 'mercury', 'venus', 'mars', 'pluto', 'europa' If Earth is selected the function uses the more accurate AtmDens2. nu should be between -pi and pi. Type DVOrbitDrag for an example of slightly elliptical orbits around Earth and Mars. Form: dV = DVOrbitDrag( el, nu, b, planet ) ------------------------------------------------------------------------ ------ Inputs ------ el (1,6) [a i w W e M] w is argument of perigee, W ascending node nu (1,2) True anomaly [start finish] b (1,1) Ballistic coefficient drag coefficient*area/mass (m^2/kg) planet (1,1) Planet name ------- Outputs ------- dV (1,1) Total drag loss (km/s) ------------------------------------------------------------------------
AC: ACData/ACTConstants AerospaceUtils: AtmosphericCalculations/AtmDens1 AerospaceUtils: AtmosphericCalculations/AtmDens2 AerospaceUtils: AtmosphericCalculations/AtmDensTitan AerospaceUtils: AtmosphericCalculations/NeptuneDensity Orbit: OrbitCoord/SLR Orbit: OrbitMechanics/RVOrbGen SC: BasicOrbit/CP2I SC: BasicOrbit/E2M SC: BasicOrbit/E2Nu SC: BasicOrbit/M2E SC: BasicOrbit/M2EApp SC: BasicOrbit/M2EEl SC: BasicOrbit/M2EHy SC: BasicOrbit/Nu2E SC: BasicOrbit/Nu2M SC: BasicOrbit/Period SC: Environs/MolWt2R SC: SCData/sCTConstants Common: CommonData/Constants Common: CommonData/SwooshWatermark Common: CommonData/xSplashSmall Common: Database/Constant Common: General/CellToMat Common: General/DeBlankLT Common: General/DeleteCell Common: General/MatToCell Common: General/Watermark Common: Graphics/Axis3D Common: Graphics/Mesh2 Common: Graphics/NewFig Common: Graphics/Plot2D Common: Graphics/PlotDoubleYAxis Common: Graphics/PltStyle Common: Graphics/TimeLabl Common: Graphics/TitleS Common: Graphics/XLabelS Common: Graphics/YLabelS Common: Graphics/ZLabelS Math: Linear/DupVect Math: Linear/Mag
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