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Phase II Final Report - NASA's Institute for Advanced Concepts

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Chapter 2.0 Entomopter Configuration and Operation<br />

2.4 Environmental Conditions <strong>for</strong> Flight on Mars<br />

in<strong>for</strong>mation and the influence it has on the Entomopter design may be subject to change as our<br />

understanding of the Mars environment increases.<br />

2.4.1 Physical Properties<br />

Table 2-1: Physical Properties of Mars<br />

Inclination of Equator to Orbit<br />

Day Period<br />

Solar Radiation Intensity<br />

25.2 o<br />

24 hours, 39 minutes<br />

Mean: 590 W/m 2<br />

Parihelion: 718 W/m 2<br />

Apehelion: 493 W/m 2<br />

Gravitational Constant 3.73 m/s 2<br />

Sidereal Year<br />

Surface Temperature Extremes<br />

687 days (Mars)<br />

130 o K to 300 o K<br />

2.4.2 Atmospheric Conditions<br />

Table 2-2: Mars Atmospheric Composition<br />

[243]<br />

Gas<br />

Percent Volume<br />

Carbon Dioxide (CO 2 ) 95.32<br />

Nitrogen (N 2 ) 2.7<br />

Argon (Ar) 1.6<br />

Oxygen (O 2 ) 0.13<br />

Carbon Monoxide (CO) 0.07<br />

Water Vapor (H 2 O) 0.03<br />

Neon (Ne)<br />

Krypton (Kr)<br />

Xenon (Xe)<br />

2.5 ppm<br />

0.3 ppm<br />

0.08 ppm<br />

Mars atmospheric profiles are listed in Appendix A. This appendix consists of four atmospheric<br />

profiles generated by different sources and <strong>for</strong> different locations on Mars. The data available<br />

with each profile is not necessarily the same.<br />

The first profile is a reference atmosphere supplied by JPL. This data was generated <strong>for</strong> a latitude<br />

of -20°. It provides data on temperature, pressure, viscosity, and density from just above the<br />

surface to nearly 10 km [142].<br />

33

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