mvdmakesthings / Ephemeris

Challenging myself to learn a complex subject and build a swift library on orbital mechanics. A Swift framework for building apps to track satellites from TLE data using the SGP4 propagation model. 🛰👩🏽‍🚀🔭

Ephemeris - Satellite Tracker Framework

Online Resources

Here are some of the online resources I used or read to get a better understanding of the mechanics behind tracking orbiting bodies.

• Satellite Tracking Using NORAD Two-Line Element Set Format, Transilvania University of Braşov, written by Emilian-Ionuţ CROITORU, Gheorghe OANCEA
  • http://www.afahc.ro/ro/afases/2016/MATH&IT/CROITORU_OANCEA.pdf
• Calculation of Satellite Position from Ephemeris Data, Applied GPS for Engineers and Project Managers, ascelibrary.org
  • https://ascelibrary.org/doi/pdf/10.1061/9780784411506.ap03
• Describing Orbits, FAA US Gov
  • https://www.faa.gov/about/office_org/headquarters_offices/avs/offices/aam/cami/library/online_libraries/aerospace_medicine/tutorial/media/iii.4.1.4_describing_orbits.pdf
• Transformation of Orbit Elements, State and Coordinates of Satellites in Two-Body Motion. Space Electronic Reconnaissance: Localization Theories and Methods, First Edition.
  • https://onlinelibrary.wiley.com/doi/pdf/10.1002/9781118542200.app1
• Introduction to Orbital Mechanics, W. Horn, B. Shapiro, C. Shubin, F. Varedi, California State University Northridge
  • https://www.csun.edu/~hcmth017/master/master.html
• Computation of Sub-Satellite Points from Orbital Elements, by Richard H. Christ, John F Kennedy Space Center, NASA
  • https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19650015945.pdf
• Satellite Orbits, calculus castle
  • http://calculuscastle.com/orbit.pdf

Sidereal Time / Julian Time Calculations

• https://www.academia.edu/20528856/Methods_of_Astrodynamics_a_Computer_Approach
• http://www2.arnes.si/~gljsentvid10/sidereal.htm
• http://www.celestrak.com/publications/AIAA/2006-6753/AIAA-2006-6753-Rev3.pdf
• https://www.aavso.org/computing-jd

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Licensed Apache Version 2.0, 2020

See ACKNOWLEDGEMENTS and LICENSE for more information.