UFLAE Codes
Position, importance, time and duration of solar flares as reported by a single optical observatory. (Importance in conformance with the recommendations of IAU Commission 10 as of 1 January 1966.)
Example:
Definition of symbols:
- UFLAE comes from solar FLArEs
- 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
- Coded location of each non-quiet region:
- Q = quadrant (heliographic coordinates) of the active region
- 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
- d = flare importance based upon corrected area in square
- 0 = subflare(s); area < 2.0 square degrees
- 1 = importance 1; 2.1 square degrees < area < 5.1 square degrees
- 2 = importance 2; 5.2 square degrees < area < 12.4 square degrees
- 3 = importance 3; 12.5 square degrees < area < 24.7 square degrees
- 4 = importance 4; area > 24.8 square degrees
- e = flare intensity based upon relative evaluation
- 7 = faint
- 8 = normal
- 9 = bright
- AAA = uncorrected flare area in millionths of solar disk
- a = start time qualifier
- 6 = start of flare
- 7 = first observation of flare in progress
- HHmm = UT hour and minute of first observation of flare
- b = observing quality indicator
-
- 1 = very poor
- 2 = poor
- 3 = fair
- 4 = good
- 5 = exceptional
- HHmm = UT hour and minute of flare maximum (use / / / / if unknown)
Note: Repeat group bHHmm for secondary maximums
- c = end time qualifier
- 8 = end of flare
- 9 = last observation of flare in progress
- HHmm = UT hour and minute of end or last observation of flare
Note: Repeat groups QXXYY deAAA aHHmm bHHmm cHHmm as required to describe flares observed
Note: / is to be used for data not available.