Path: SC/Ephem
% Generate Keplerian elements for the ISS
Generates elements for the International Space Station from a two-element
set from Celestrak, https://celestrak.com. Type ISSOrbit for a demo with
a plot of the ISS ground track. If there are no outputs it will plot the
elements using sgp as a propagator.
Fixed elements are from 07/16/2020. 'latest' is the default set. These
are saved in a persistent variable and updated only if more than 2 hours
has elapsed since the last call, to avoid server errors. Elements are
only updated on Celetrak once or twice per day.
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Form:
ISSOrbit; % demo
[el, jD0, s] = ISSOrbit( set )
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Inputs
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set (1,:) 'high' 'low' 'latest' 'fixed'
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Outputs
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el (1,6) Elements vector [a,i,W,w,e,M]
jD0 (1,1) Julian date of epoch
s (1,166) The two line elements
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CubeSat: Visualization/GroundTrack Orbit: OrbitMechanics/NORADToEl Orbit: OrbitMechanics/RVOrbGen Common: Graphics/Plot2D Common: Graphics/TimeLabl Math: Linear/Mag
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