But the first question was about "adjustment"
The first question was about calibration, which in electronic equipment generally refers to adjustments of scale, gain or sensitivity.
The gyro does not know, where its installed.
That explains the antenna-adjustment. Its not interesting, to see, how the weather is in "outer space"!
The antenna is stabilised to operate in the true local horizontal plane and operates to that datum regardless of aircraft attitude. Working from that datum, the antenna may be tilted manually (both above and below the horizontal plane) by the pilot, in order to examine the weather ahead and within the scanning arc of the antenna. When tilted up, the weather radar would indeed be examining "outer space" as you put it, but in doing so will detect any weather between the aircraft and the rest of the cosmos.
Adjustment of antenna stabilisation comes under what
airflorida1 correctly describes as "field adjustments".