Characterisation of potential landing sites for the European Space Agency's Lunar Lander project

• Published in: Planetary and space science Vol. 74; no. 1; pp. 224 - 246
• Main Authors: De Rosa, Diego, Bussey, Ben, Cahill, Joshua T., Lutz, Tobias, Crawford, Ian A., Hackwill, Terence, van Gasselt, Stephan, Neukum, Gerhard, Witte, Lars, McGovern, Andy, Grindrod, Peter M., Carpenter, James D.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2012
• Subjects: Boulder size-frequency distributions; Crater size-frequency distributions; Illumination conditions; Landing hazards; Landing site characterisation; Lunar Orbiter Laser Altimeter; Lunar Reconnaissance Orbiter Camera; Lunar South Pole; Landing hazards; Lunar Orbiter Laser Altimeter; Landing site characterisation; Lunar Reconnaissance Orbiter Camera; Lunar South Pole; Crater size-frequency distributions; Boulder size-frequency distributions; Illumination conditions
• ISSN: 0032-0633; 1873-5088
• DOI: 10.1016/j.pss.2012.08.002

This article describes the characterisation activities of the landing sites currently envisaged for the Lunar Lander mission of the European Space Agency. These sites have been identified in the South Pole Region (−85° to−90° latitude) based on favourable illumination conditions, which make it possible to have a long-duration mission with conventional power and thermal control subsystems, capable of enduring relatively short periods of darkness (in the order of tens of hours), instead of utilising Radioisotope Heating Units. The illumination conditions are simulated at the potential landing sites based on topographic data from the Lunar Orbiter Laser Altimeter (LOLA), using three independent tools. Risk assessment of the identified sites is also being performed through independent studies. Long baseline slopes are assessed based on LOLA, while craters and boulders are detected both visually and using computer tools in Lunar Reconnaissance Orbiter Camera (LROC) images, down to a size of less than 2m, and size-frequency distributions are generated. Shadow hazards are also assessed via LROC images. The preliminary results show that areas with quasi-continuous illumination of several months exist, but their size is small (few hundred metres); the duration of the illumination period drops quickly to less than one month outside the areas, and some areas present gaps with short illumination periods. Concerning hazard distributions, 50m slopes are found to be shallow (few degrees) based on LOLA, whereas at the scale of the lander footprint (∼5m) they are mostly dominated by craters, expected to be mature (from geological context) and shallow (∼11°). The preliminary conclusion is that the environment at the prospective landing sites is within the capabilities of the Lander design. ► Landing sites characterization for ESA Lunar Lander is presented. ► Input data quality and its impact on landing sites characterization are assessed. ► Illumination conditions are simulated using Lunar Orbiter Laser Altimter data (LOLA). ► Landing risk is evaluated using LOLA and Lunar Reconnaissance Orbiter Camera. ► Illumination and risk are shown to be compatible with Lander's performances.