Oh, right. Copyright PROTECTION is not available. It is the protection that is not available. The copyrights exist, not withstanding that they are not protected.
Your statement was essentially correct.
The inavailability of copyright PROTECTION means the government will not (as it cannot) PROTECT its copyrights.
Note the statute does not state that the copyright does not exist or that it cannot be ransferred to another party.
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'Reproduction rights' ARE a component of copyright by definition.
While they may have sold processed imagery, they certainly also sold unenhanced imagery exactly as it was received from the government.
Perhaps we should locate and read that contract. ISTR that others were prohibitted from distributing the raw LandSat imagery that was transferred, which if so, is therfor indistinguishible from a transfer of copyright.