Initial Pioneer Venus Magnetic Field Results: Nightside Observations

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Science  06 Jul 1979:
Vol. 205, Issue 4401, pp. 114-116
DOI: 10.1126/science.205.4401.114


Initial observations by the Pioneer Venus magnetometer on the nightside of Venus frequently reveal moderately strong fields from 20 to 30 nanoteslas. However, there is little evidence that thesefields arise from an internal dynamo since they are mainly horizontal and vary from orbit to orbit. Determining a precise upper limit to the intrinsic moment awaits further processing. This limit is expected to be much less than 1022 gauss-cubic centimeters.