INITIAL SELECTION CRITERIA – All Sites Meet

ELEVATION

Below –1.3 km Elevation

LATITUDE

MER A 5°N-15°S

MER B 10°N-10°S

SURFACE PROPERTIES

Thermal Inertia >125-170 SI Units

Rock Abundance <20%; <1% Area Covered by >0.5 m High Rocks

>-95°C at 1 m Above Surface, I/Alb - 220/0.12 to 260/0.28

Reflectivity >0.05 – Radar Reflective Surface

SLOPE

Initially RMS Slopes <6°; Then <15°

HAZARD FREE IN MDIM

Smooth, Flat Looking in MDIM, Avoid Bumps, Hills, etc.

Avoid All Obvious Fresh Craters >5-10 km Dia

LANDING SITE SAFETY

SLOPES

1 km Scale, Slopes <2° <35 m Relief MOLA Topo/Slopes

Non-Accelerating Roll

100 m Scale, Slopes <5° <10 m Relief MOLA Pulse Spread

Radar Spoofing, Mesa Failure Scenario

5 m Scale, Slopes <15° <1.34 m Relief MOC Stereo, Photoclin

Bounce Velocity (vertical & horizontal), Lander Stability

Rover Deployment

ROCK ABUNDANCE

<20% Rock Coverage

Impact Hazards (Rocks >0.5 m height)

Rover Egress

May Constrain to Even Lower Rock Abundances

SURFACE PROPERTIES

Load Bearing and Trafficable Surface

How Much Dust?

Coat Rocks and Solar Panels

LANDING SITE SAFETY PRESENTATIONS

SLOPES

GARVIN – Pulse Spread

Look for Relief of <10 m over 150 m MOLA Footprint; PS <2 m

SHEPHARD

Look for Slopes over 150 m, Inferences for 5 m Scale

KIRK and McEwen

Look for 15° Slopes or Relief of 1.34 m over 5 m

ROCK ABUNDANCE

NOWICKI – TES Rock Abundance

Look for >20%

SURFACE PROPERTIES

PELKEY – TES Thermal Inertia

Inferences for Surface Properties

Duricrust

RUFF - Albedo

Dust

SUMMARY OF SAFETY EVALUATIONS - Golombek