Módszerek összehasonlítása

	Proportional Navigation	SGP4 TLE Propagáció
Tudományterület	Repülés- és űrtechnika	Repülés- és űrtechnika
Módszercsalád	Process / pipeline	Process / pipeline
Keletkezés éve	1957	1970s
Megalkotó	Lin-Hsiung Chu	NORAD, USAF
Típus	Guidance law	Propagation method
Alapmű	Knox, W. P. (1971). On optimal proportional navigation. IEEE Transactions on Aerospace and Electronic Systems, AES-7(3), 417–426.	Vallado, D. A., Crawford, P., Hujsa, R., & Kelso, T. S. (2006). Revisiting Spacetrack Report Number 3. In AIAA/AAS Astrodynamics Specialist Conference.
Alternatív nevek	PN, PN law	SGP4, TLE propagation, simplified perturbations
Kapcsolódó	3	3
Összefoglaló	Proportional Navigation (PN) is a guidance law that generates command accelerations proportional to the rate of change of the line-of-sight angle between a pursuer and target. Introduced by Lin-Hsiung Chu in the 1950s, it became the foundation of modern missile guidance systems. PN solves the pursuit-evasion problem by ensuring that the pursuer intercepts a moving target with minimal computational overhead.	SGP4 (Simplified General Perturbations 4) is a rapid orbital propagation method that predicts satellite position and velocity from Two-Line Element (TLE) sets published by NORAD. Developed in the 1970s, SGP4 accounts for atmospheric drag, gravitational perturbations, and solar radiation pressure using simplified analytical models. SGP4 is the de facto standard for space surveillance, conjunction assessment, and satellite tracking.