America’s next generation of Earth-observation satellites is in trouble
WITHOUT satellites, both forecasting the weather and studying the climate would be a lot harder than they are. Such satellites, however, need replacing from time to time, and those used by the Americans are coming to the end of their useful lives. Unfortunately, the plan for their replacement is in chaos. Indeed, the National Polar-orbiting Operational Environmental Satellite System, NPOESS, as the replacement system is known, has suffered so many delays and budget increases that its whole future is in doubt. If things go badly wrong, crucial data about the climate could be lost.
It is not for want of foresight. In the mid-1990s, plans were made for a new generation of Earth-observation satellites to take over from those now in orbit. At that point, NPOESS was supposed to cost about $6.5 billion. By 2002, when the main contracts were awarded, this had inched up to $7 billion. But by 2005 it had ballooned to $10 billion and the launch of the first satellite, originally scheduled for 2006, had been delayed by almost two years. …




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