UCOHO Codes

Example:

Definition of symbols:

First Line-

  • UCOHO comes from COronal HOle,

  • I I I I I = station indicator

  • Y = last digit of year
  • MM = month of year, 01 = January, 02 = February, etc
  • . DD = UT day of month of observation

  • HHmm = UT hour and minute nearest beginning of observation
  • / = filler

  • T = type of measurement
    • 1 = 530.3 nm (FE XIV green line)
    • 2 = 1083 nm (Helium)
    • 3 = radio scan
    • 4 = x-ray image
    • 5 = EUV
  • nn = number of coronal holes reported

Data Lines-

  • T = type
    • 1 = polar north (use // in the next section for the serial number)
    • 2 = polar north extension
    • 3 = polar south (use // in the next section for the serial number)
    • 4 = polar south extension
    • 5 = isolated
    • 6 = unknown (for example from E-W drift radio scan data)
  • NN = serial number of the coronal hole (use // for polar north or polar south)
  • q = certainty of the existence of the coronal hole
    • 1 = uncertain
    • 2 = poor
    • 3 = fair
    • 4 = good
  • P = polarity
    • 1 = positive
    • 2 = negative
    • 3 = not determined

  • AAA = area in thousandths of solar hemisphere
  • nn = number of boundary points reported (no more than 20 points, minimum number of
  • points is four, must include maximum east longitude, west longitude, north latitude, and south latitude for each hole)

  • Q = heliographic coordinates of selected boundary points (must include maximum east longitude, west longitude, north latitude, and south latitude for each hole)
    • 1 = NE (northeast)
    • 2 = SE (southeast)
    • 3 = SW (southwest)
    • 4 = NW (northwest)
  • XX= distance to central meridian in degrees
  • YY = heliographic latitude in degrees

  • c c c = Carrington longitude of the center of the coronal hole
  • / / = filler

Last Data Line-

  • 99999 = end of data terminator; indicates that all coded data has been received

Text Lines-

  • PLAIN = Plain language text information

  • BT = Break in transmission (end of message terminator)

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