sentences:  NASA calculated that this approach would mean that the surface would not be heated by more than one 1 °C (1.8 °F), and that it would move no more than of surface material.Since most of Viking's experiments focused on the surface material a more straightforward design would not have served.The "Viking 1" lander touched down in western Chryse Planitia ("Golden Plain") at at a reference altitude of relative to a reference ellipsoid with an equatorial radius of and a flatness of 0.0105 (22.480° N, 47.967° W planetographic) at 11