Single-frequency measurements of solar radio flux and events, with location of events if also measured at that frequency.


Definition of symbols:

  • URANJ comes from RAdio Noise, codeJ

  • I I I I I = station indicator

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

  • FFFFF = frequency in MHz

Note: Repeat URANJ I I I I I YMMJJ for each frequency measured.

  • aa = UT hour nearest beginning of observation period
  • bb = UT hour nearest end of observation period
  • c = number of significant events reported

  • ddd = background flux in 10-22Wm-3Hz-3 , adjusted for burst effects if necessary. Divide flux by 10 if frequency greater than 20 GHz.
  • ee = nearest UT hour of flux measurement

Note: Omit group dddee if these measurements are not made.

  • 9 = 9 indicates the begin time of an event report follows
  • HHmm = UT hour and minute of beginning of significant event (if in progress at beginning of observation period, use / / / /)

Note: For each new burst, start burst data with 9HHmm

  • g = key to type of event where
    • 1 = meter-wave noise storm
    • 2 = rise in base level (usually meter-wave)
    • 3 = meter-wave minor burst, or microwave simple burst
    • 4 = group of bursts, of fluctuations
    • 5 = meter-wave major burst, or microwave complex burst
    • 6 = "plus" part of "major-plus" burst, or microwave post-burst increase
  • HHmm = UT hour and minute of end of event (if still in progress at end of observation period, use / / / /)

  • h = key to measurement of maximum flux of event influx units, where
    • 5 = actual measurement
    • 6 = lower limit (due to receiver saturation, aerial mistracking, etc.)
  • i i i i = peak flux of the event above pre-burst level, in 10-22Wm-3Hz-3

Note: If the event is a noise storm, use the median flux; the time of maximum can then be replaced by / / / /. If peak flux is over 9999, replace by word FLUX and send flux as an extra 5-figure group immediately following h i i i i.

  • OR

  • k = key to measurement of maximum flux in terms of percent increase, where
    • 7 = actual measurement
    • 8 = lower limit
  • l l l l = peak flux reported as percent increase over pre-burst level; for example, small bursts start from 0%, not 100%.

Note: More than one significant maximum per burst can be reported by repeating from the h i i i i or k l l l l group. These are distinguished by their first digit 5, 6, 7 or 8, from the start of another burst which starts with a 9. One or more Qoppp or Qxxyy groups can be given with each flux maximum, to show the source position(s) contributing to that maximum. These are distinguished by the first digit being 0, 1, 2, 3, or 4. If necessary to show the motion of a moving source, later positions may be given at an arbitrary chosen time, not necessarily time of maximum flux.

  • / = filler
  • HHmm = UT hour and minute of maximum

  • Q = 0 to signify that fan-beam measurement of E-W location of burst source follows
  • o = location of burst source east or west of scan center, where
    • 7 = east
    • 8 = west
  • ppp = distance of burst source from scan center, in percent of photospheric radius

Note: Omit group Qoppp if these measurements are not made.

  • OR

  • Q = quadrant containing the noise source, where
    • 1 = NE (northeast)
    • 2 = SE (southeast)
    • 3 = SW (southwest)
    • 4 = NW (northwest)
  • XX = distance to east or west of N-S diameter in tenths of photospheric radius
  • YY = distance north or south of E-W diameter in tenths of photospheric radius

Note: Omit group Qxxyy if these measurements are not made.

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