Kwok, Ronald (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rignot, Eric (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Holt, Benjamin (JPL Pasadena, CA, United States)
Onstott, R. (Michigan Environmental Research Institute, Ann Arbor, United States)