Imagine two altimeter satellites flying in the same orbital plane with an along-track spacing of 1,000 km. Within a few minutes, both altimeters measure the sea surface height at 50°N in the North Atlantic. Due to the rotation of the Earth, the two crossings of the 50°N circle take place at different longitudes. The SSH is found to be 0.06 m higher at the second measurement location than at the first measurement location. a) Assuming that the satellite speed along its ground track is 7,000 m/s, how many kilometers east or west of the first measurement does the second one take place?