WASHINGTON — NASA is overhauling its Landsat acquisition strategy to appease one of its key supporters in the U.S. Senate. But the U.S. space agency is no closer to moving out on development of a new land-imaging satellite than it was two months ago when Sen. Barbara Mikulski (D-Md.) first objected to the fixed-price approach the agency had intended to take and asked NASA to halt the procurement.

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