The service is studying alternatives to the Space Development Agency's Transport Layer, which is providing small satellites for tactical communications.
Defense officials argued the spending request should also include another spending bill in Congress, which would bring the total closer to $961 billion.
A report by the Defense Intelligence Agency found that while the US strikes did significant damage, the Iranian nuclear sites were not totally destroyed.
A dozen jets of the A variant will bring dual-capable aircraft to the Royal Air Force, allowing Britain to partake in NATO's airborne nuclear deterrent.