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The tool for measuring the dip of formations, i.e., for making a dipmeter log (q.v.). The resistivity dipmeter includes (a) three or more microresistivity readings made using sensors distributed in azimuth about the logging sonde, (b) a reading of the azimuth of one of these, (c) a reading of the hole deviation or drift angle, (d) its bearing, and (e) one or two caliper measurements. Earlier dipmeters used three SP curves, three wall scratchers, etc.