UPLAK Codes

Area, importance, and intensity of calcium plages

Example:

Definition of symbols:

  • UPLAK comes from PLAges, code K

  • I I I I I = station indicator

  • . DD = UT day of observation
  • . HHH = UT time of observation in hours and tenths of

  • q = quality of observation on a scale from 1 to 5
    • 1 = very poor
    • 2 = poor
    • 3 = fair
    • 4 = good
    • 5 = exceptional
  • d = number of days since last message from this station
  • / = filler
  • nn = number of plages (three 5-digit groups each) for which information will follow

  • e e e = serial number assigned by observatory
  • f = importance of plage region on a scale of 1 to 3 combined with information on the stage of evolution
    • 1 = importance 1, increasing stage
    • 2 = importance 2, increasing stage
    • 3 = importance 3, increasing stage
    • 4 = importance 1, stable
    • 5 = importance 2, stable
    • 6 = importance 3, stable
    • 7 = importance 1, decreasing stage
    • 8 = importance 2, decreasing stage
    • 9 = importance 3, decreasing stage
    • 0 = no evaluation given
  • g = age of the region
    • 1 = born on disk
    • 2 = born on invisible hemisphere, first disk transit
    • 3 = second disk transit
    • 4 = third disk transit
    • 5 = fourth disk transit
    • 6 = fifth disk transit
    • 7 = sixth disk transit
    • 8 = seventh disk transit
    • 9 = eighth disk transit
    • 0 = no evaluation given

  • Q = quadrant (heliographic coordinates) containing the plage
    • 6 = start of flare
    • 7 = first observation of flare in progress
  • HHmm = UT hour and minute of first observation of flare

  • Q = quadrant (heliographic coordinates) containing the plage
    • 1 = NE (northeast)
    • 2 = SE (southeast)
    • 3 = SW (southwest)
    • 4 = NW (northwest)
  • XX = distance to the central meridian in degrees
  • YY = heliographic latitude in degrees

  • i i i = area in millionths of the solar hemisphere, divided by 100
  • j = intensity
    • 1 = faint
    • 2 = 1.5
    • 3 = 2
    • 4 = 2.5
    • 5 = 3
    • 6 = 3.5
    • 7 = 4
    • 8 = 4.5
    • 9 = 5 (very bright)
  • k = last digit of check sum of preceding 14 digits

Note: / is to be used for data not available.