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.