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On the use of a sunward-libration-point orbiting spacecraft as an IMF monitor for magnetospheric studiesMagnetospheric studies often require knowledge of the orientation of the IMF. In order to test the accuracy of using magnetometer data from a spacecraft orbiting the sunward libration point for this purpose, the angle between the IMF at ISEE 3, when it was positioned around the libration point, and at ISEE 1, orbiting Earth, has been calculated for a data set of two-hour periods covering four months. For each period, a ten-minute average of ISEE 1 data is compared with ten-minute averages of ISEE 3 data at successively lagged intervals. At the lag time equal to the time required for the solar wind to convect from ISEE 3 to ISEE 1, the median angle between the IMF orientation at the two spacecraft is 20 deg, and 80% of the cases have angles less than 38 deg. The results for the angles projected on the y-z plane are essentially the same.
Document ID
19850019115
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Kelly, T. J.
(California Univ. Los Angeles, United States)
Crooker, N. U.
(California Univ. Los Angeles, United States)
Siscoe, G. L.
(California Univ. Los Angeles, United States)
Russell, C. T.
(California Univ. Los Angeles, United States)
Smith, E. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1984
Subject Category
Geophysics
Report/Patent Number
NAS 1.26:175809
NASA-CR-175809
Report Number: NAS 1.26:175809
Report Number: NASA-CR-175809
Accession Number
85N27426
Funding Number(s)
CONTRACT_GRANT: JPL-955376
CONTRACT_GRANT: NSG-5351
CONTRACT_GRANT: NAS5-28448
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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