Instead of these shades, which block view and seem like would trap heat in summer ( worked for a company that sold a version that had big vent on top for that reason).....

how about either mirrors, or better yet some mirror one-way film on frame, that would be mounted on arms, and be same size as window.

In summer it would be more or less like pic but would have gap on top, probably rest the nose a few inches above top of window for full shade but still have big gap. Then winter have "shades" rotate down so it reflects extra sun up through window onto inside ceiling.

Being same size as window, could also serve as storm shutters or extra insulation.

Arms maybe similar to an adjustable drafting table. Would only need to reset to new position 2x a year, and could be two fixed positions.