S. Bettadpur

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Last name
Tapley, B., Chambers, D., Bettadpur, S., & Ries, J. C. (2003). Large scale ocean circulation from the GRACE GGM01 Geoid. Geophysical Research Letters, 30. http://doi.org/10.1029/2003GL018622 (Original work published 11/2003AD)
Tapley, B., Ries, J. C., Bettadpur, S., Chambers, D., Cheng, M., Condi, F., et al. (2005). GGM02 An improved Earth gravity field model from GRACE. Journal Of Geodesy, 79, 467-478. http://doi.org/10.1007/s00190-005-0480-z (Original work published 11/2005AD)
Kang, Z., Tapley, B., Chen, J., Ries, J. C., & Bettadpur, S. (2009). Geocenter variations derived from GPS tracking of the GRACE satellites. Journal Of Geodesy, 83, 895-901. http://doi.org/10.1007/s00190-009-0307-4 (Original work published 10/2009AD)