IONFM Codes
UFOFS, UFOFH, UMUFH, UFMNH , and UFESH
Hourly ionospheric data.
Example:
Definition of symbols:
- IONFM comes from IONospheric data, FrequencyMeasurements
- 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
- / = filler
- HHmm = UT hour and minute of first data reported
- K = double hour (UT) indicator
- 0 = 00 or 01, 20 or 21
- 1 = 02 or 03, 22 or 23
- 2 = 04 or 05
- 3 = 06 or 07
- 4 = 08 or 09
- 5 = 10 or 11
- 6 = 12 or 13
- 7 = 14 or 15
- 8 = 16 or 17
- 9 = 18 or 19
- FF = F2 critical frequency in tenths of MHz
- MM = M-3000 maximum usable frequency in tenths of MHz
- EEE = Es critical frequency in tenths of MHz
- NN = Fmin frequency in tenths of MHz
Note: / is to be used for data not available.