 The technique is expected to yield topographic information of unprecedented clarity by using slightly different shuttle positions to provide three-dimensional images of the terrain below.Among the Space Radar Laboratory observations today were the North Sea, where scientists intentionally released small oil and algae spills to see how well the SRL-2 instruments could track them, as well as observations of Bebedouro, Brazil; the Western and Northeast Pacific Ocean; Chickasha, Oklahoma; the Gulf of Mexico; Ruiz, Colombia; Sena Madureira, Brazil; Weddell Sea; the Kliuchevskoi Volcano in Kamchatmka; Stovepipe Wells, California; and the Galapagos Islands.Earlier today, the Mission Management Team extended STS-68 by one day to allow additional science.