美《纽约时报》1979年11月25日刊登了威尔福德(Johnnoble Wilford)的一篇文章,题为《卫星激光探测地壳》,摘译如下:一颗小型人造卫星在四千英里的上空掠过。当卫星进入测距范围内时,设在澳大利亚、太平洋岛屿上、巴西或者加利福尼亚圣安德烈斯断层沿线的地面站每秒发射聚焦的强光脉神一次。这束脉冲激光在几分之一秒内从卫星上反射回地面站,成为测 The New York Times published an article by Johnnoble Wilford on November 25, 1979 entitled “Satellite Laser Detection of the Earth’s Crust,” which is read as follows: A small satellite is over four thousand miles Passing. When the satellites enter range, the ground stations on Australia’s, Pacific islands, Brazil or along the San Andrés fault in California launch once a second the focused light veins. The pulsed laser reflected from the satellite back to the ground station in a fraction of a second became a test