1003a part 1

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Across
  1. 3. all ___ operations are IFR
  2. 4. the interplanetary magnetic field extends beyond ___
  3. 9. lunar phase between 51% and 99%
  4. 14. SIDs are ___ in incoming solar radiation
  5. 15. gibbous phase that is losing light but is more than half illuminated
  6. 16. cycle that takes 29.5 nights
  7. 17. max ionospheric storm duration
  8. 19. crescent phase that is also called first quarter
  9. 20. explosion on sun's surface
Down
  1. 1. airfield ___ is based on the primary aircraft assigned to the airfield
  2. 2. clear skies are ___ for NVDs
  3. 5. twilight where illumination is sufficient for terrestrial objects to be clearly distinguished
  4. 6. ceilings 1000 to 3000 ft AGL
  5. 7. what exceeds sunlight and light from other natural sources during astronomical twilight
  6. 8. ___rise and ___set when the upper edge of sun’s disk is on the horizon
  7. 10. weakest geomagnetic storm intensity
  8. 11. aurora in the southern hemisphere
  9. 12. ___ meteorological conditions where ceiling and visibility equal to or better than specified minima
  10. 13. nautical twilight angle below horizon
  11. 18. upper limit of usable frequency