SkySutra, Part 4: downloads

skysutra_iss.sql
    Before you start: SS_ISS (SGP4, look angles, passes)
skysutra_iss_tests.sql
    Before you start: checks SS_ISS, then loads today's passes
skysutra_live.sql
    Lessons 4.3 and 4.4: the fetched_at triggers and SS_LIVE

The lesson's Before you start says what to run, in what order.
https://kathuko.com/apex2/part-4/
