Science. 1979 Jan 5;203(4375):45-6. doi: 10.1126/science.203.4375.45.
Preliminary reduction of Viking bistatic radar data gives root-mean-square surface slopes in the Hellas basin on Mars of about 4 degrees on horizontal scales averaged over 10 centimeters to 100 meters. This roughness decreases slightly with position along the ground track, south to north. The dielectric constant in this area appears to be approximately 3.1, greater than the martian average. These values are characteristic of lunar maria and are similar to those found near the Viking lander site in Chryse with the use of Earth-based radar.
初步处理的海盗号双基地雷达数据给出火星赫拉斯盆地的水平均方根表面斜率，在 10 厘米到 100 米的平均水平尺度上约为 4 度。这种粗糙度随着从南到北的地面轨迹位置略有减小。该区域的介电常数约为 3.1，大于火星平均值。这些值是月球海的特征，与使用地基雷达在 Chryse 附近的海盗号着陆器站点发现的值相似。
