Aerodynamic Drag | Orbital Mechanics with Python 12

Опубликовано: 09 Ноябрь 2019
на канале: Alfonso Gonzalez - Astrodynamics & SE Podcast

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In this video I go over the aerodynamic drag orbital perturbation. I show the acceleration equation that is implemented in the differential equation. I talk about the complexities of earth's atmosphere, and some different methods of modeling its density vs. altitude. The rotation of the atmosphere must also be taken into account in this perturbation. I show a plot of the ISS altitude vs. time to demonstrate how it needs to do periodic altitude raising maneuvers.

Pre-req videos:
1. Introduction / Overview -    • Introduction to Orbital Mechanics wit...
4. Developing the OrbitPropagator Class and the Planetary Data File -    • OrbitPropagator Class and Planetary D...
5. tools.py and the plot_n_orbits() function -    • Tools file and the plot_n_orbits() Fu...
8. J2 Perturbation -    • J2 Perturbation | Orbital Mechanics w...

Optional videos:
2. Two Body Problem / ODE Solvers -    • The Two Body Problem / ODE Solvers | ...
3. Developing the 3D Plotting Function -    • Developing the 3D Plotting Function |...
6. Keplerian Orbital Elements -    • Keplerian / Classical Orbital Element...
9. rv2coes() Function -    • Convert State Vector to Keplerian Orb...
10. Plotting the Keplerian / Classical Orbital Elements -    • Plot Keplerian / Classical Orbital El...

Link to how to calculate periapse and apoapse
https://en.wikipedia.org/wiki/True_an...
Go to "Radius from true anomaly" section and thats the equation I use, where they have the Greek letter nu as the true anomaly, and the equation simplifies when nu = 0 or 180 degrees.

Link to a lecture on the atmosphere (long but informative if you want to learn more)
   • 04. Vertical Structure of the atmosph...

Link to video about the solar cycle (there's plenty more out there on YouTube this is just one).
   • NASA | Solar Cycle

I got a real mic now so the sound will be good from now on.