STOVL can certainly be retrofitted the same way lots of things are: as an external pod.
Guide the pilot into a suitable position above the landing area. (with visual indicators, much like those for a bombing run) Once the plane is in the right spot, a computer finishes the job with full automation. The aircraft is stalled. The pods fire rockets. The aircraft is guided down and brought to a stop.
This retrofit would be particularly sensible for the F-15, which normally carries conformal fuel tanks. That would be a fine place to install the retrofit.
Guide the pilot into a suitable position above the landing area. (with visual indicators, much like those for a bombing run) Once the plane is in the right spot, a computer finishes the job with full automation. The aircraft is stalled. The pods fire rockets. The aircraft is guided down and brought to a stop.
This retrofit would be particularly sensible for the F-15, which normally carries conformal fuel tanks. That would be a fine place to install the retrofit.