Page xiv

4     ASSESSMENT 72
    Assessment of Data Set Availability by Variable, 73
    Summary of Major NASA Contributions, 90
    Better Management of NASA's Current Generation of Polar Geophysical Data Sets, 91
5     CONCLUSIONS AND RECOMMENDATIONS 95
    Data Gaps and Measurement Needs, 96
    NASA's General Strategy on Polar Data Sets, 99
    Effectiveness of the Distributed Active Archive Centers, 101
REFERENCES 104
APPENDIXES 107
A     Acronyms and Initialisms, 107
B     Data Sets Survey, 111
C     Biosketches of the Committee's Members, 121


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