The next decadal survey for space-based Earth science, preparing to get underway this summer, will be challenged to meet wide-ranging science requirements from several agencies and incorporate new technologies while staying within realistic budgets, according to those involved in the study.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...