Landing footprint
A landing footprint, also called a landing ellipse, is the area of uncertainty of a spacecraft's landing zone on an astronomical body. After atmospheric entry, a non-powered spacecraft will land in an area depending upon entry angle, entry mass, atmosphere and drag. It is therefore impossible to know the spacecraft's landing point with absolute precision. By simulating varying reentry courses, a numerical simulation will produce a plot resembling a footprint. The footprint size depends on the confidence interval used to develop the map.[1]
The landing footprint of Opportunity rover on Meridiani Planum
References
- Lakdawalla, Emily (13 May 2008). "Landing Ellipse". The Planetary Society. Retrieved 7 May 2018.
Further reading
- Mitcheltree, Robert A.; Kellas, Sotiris (January 1999). A Passive Earth-Entry Capsule for Mars Sample Return (Report). NASA/Langley Research Center.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.