1. Brandon Rhodes at pypi.org. sgp4: Track earth satellite TLE orbits using up-to-date 2020 version of SGP4. https://pypi.org/project/sgp4/. Accessed: 2021-03-26. Brandon Rhodes at pypi.org. sgp4: Track earth satellite TLE orbits using up-to-date 2020 version of SGP4. https://pypi.org/project/sgp4/. Accessed: 2021-03-26.
2. The perfect time: An examination of time- synchronization techniques;Behrendt Ken;Schweitzer Engineering Laboratories,2005
3. Exact and Approximate Maximum Likelihood Localization Algorithms
4. A simple and efficient estimator for hyperbolic location
5. North American Aerospace Defense Command. Celestrac: Norad two-line element sets current data. https://www.celestrak.com/NORAD/elements/. Accessed: 2021-03-26. North American Aerospace Defense Command. Celestrac: Norad two-line element sets current data. https://www.celestrak.com/NORAD/elements/. Accessed: 2021-03-26.