Engineering Constraints
(See Golombek & Parker's
memorandum
for explanations.)
Parameter |
Constraint |
Comment |
|
MER-A Latitude |
15°S to 5°N |
|
|
MER-B Latitude |
10°S to 10°N |
|
|
Elevation |
< -1.3 km |
MOLA-defined, relative to MOLA-defined geoid |
|
Low-Altitude Winds, Wind Shear |
< 20 m/s |
|
|
Separation of Two Landing Sites |
>= 37° |
solid angle on the surface |
|
Surface Slopes |
<= 15° |
in general |
|
Surface Images |
appear hazard-free,
relatively smooth and flat
|
e.g. no fresh craters |
|
Total Rock Coverage |
< 20% |
as derived from thermal IR measurements |
|
Rocks > .5 m |
< 1% |
|
|
Radar Reflectivity |
> 0.05 |
|
|
Fine Component Thermal Inertia |
> 3 - 4 x 10
-3
cal cm
-2
s
-1/2
K-1 or cgs units |
equivalent to 125 - 165 J m
-2
s
-1/2
k-1 or SI units |
|
Extremely high albedo and low thermal inertia regions
should be avoided. |
Interactive MOC image maps (through mission cycle E10)
