Your numbers

One reading per line: azimuth in degrees from north (0 to 360), then altitude of the skyline in degrees. Commas, spaces, tabs and a header line are accepted.
Optional. Empty keeps your own points. 5 writes a point every 5°.
OutputThe N.I.N.A. docs example starts with one. Leave it off for Telescopius.
Optional.
Optional.

Result

Fill in the fields and press Calculate.