Radio propagation indices for certain radio circuits, monitored at the observatory.
Definition of symbols:
- UPROP comes from radio PROPagation
- I I I I I = station indicator (see lists in Appendix C)
- Y = last digit of year
- MM = month of year, 01 = January, 02 = February, etc.
- DD = UT day of month of observation
- HH = UT hour of the start of the 24-hour period for which the Propagation Index is calculated
- / = filler
- z z = last two digits of check sum of all the following digits
- a a = circuit monitored
- 01 = Tokyo, Japan
- 02 = New York, USA
- 03 = Tehran, Iran
- 04= Oslo, Norway
- 05 = Bracknell, England
- 06 = Canberra, Australia
- 07 = Johannesburg, South Africa
- 08 = Rome, Italy
- 09 = Moscow, USSR
- 10 = Fort Collins, Colorado, USA
- 11 = Melbourne, Australia
- b b = Propagation Index from 0.1 - 9.9, where 6.0 = normal.
- Conditions are "normal" (index 6.0) if they correspond to the average of the preceding
- 27 days (1 sun rotation) Scale of Propagation Index.
- 0.1 - 1.0 = very poor
- 1.1 - 3.0 = poor
- 3.1 - 5.0 = fair
- 5.1 - 7.0 = normal
- 7.1 - 9.0 = good
- 9.1 - 9.9 = very good
- c = Number of frequencies that are used to calculate the Propagation Index.
Note: The Melbourne circuit consists of five frequencies that transmit for the world-wide CCIR HF field strength measuring campaign.
Last Data Lines-
- 99999 = end of data terminator - indicates that all coded data has been received
- PLAIN = Plain language text information
- BT = Break in transmission (end of message terminator)