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IARUMS R1 Newsletters

The IARUMS R1 monthly Newsletter contains all the reports about the received transmissions sent by intruders in amateur bands that IARUMS R1 National Coordinators of the national societies send to the IARUMS R1 Regional Coordinator. It may also contain explanations about signals received as many more interesting informations related to this kind of transmissions. It is published by the IARUMS R1 Regional Coordinator.

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Newsletter’s Guide

The reports of the national societies are structured as follows (example only) :

Row 1 and 2: Header of the table; reporting Society, followed by Name and Call of the coordinator
Row 2: Columns Name

Column 1: kHz = Frequency
Indicates the frequency of a signal in kHz. For SSB voice, the suppressed carrier (‘dial’ = RF) frequency is used, and LSB/J3E‑L or J3E‑U is specified in the mode column. For all other modes (most digital signals) the center frequency (CF) is used. 

Column 2: UTC = Time
Always indicated in UTC, 4 digits: e.g., 1028

Column 3: DD = Day
2 digits: e.g., 14 

Column 4: MM = Month
Specifies the month of the current report, 2 digits: eg 01 

Column 5: ITU = country of origin
Indicates the ITU letter code: e.g., SUI (Switzerland).
> see ITU:‑R/terrestrial/fmd/Pages/administrations_members.aspx

Column 6: Ident
Identification like Callsigns, Selcalls, Name of a BC.

Column 7: Mode
Describes the Mode of an emission

  • Classification of emissions as per ITU, e.g., A1A, B7D, F1A, F1B, G1D, J7D, J3E (-U or ‑L), and so on.
  • Modulation, e.g., PSK‑8, FSK, FMOP, FMCW, OFDM (##), RTTY, CW, USB/LSB. Names of modems or nicknames, if known, are specified under Details.

Column 8: BD = Baudrate /sps / WPM
Indicates the Baudrate, CW speed in WPM, Sweeps per second sps; e.g. 40 sps for an OTHR

Column 9: SH/BW = Shift or Bandwidth
e.g., for a FSK 200Hz, for a OTHR e.g., 12 kHz (short 12k0)
Also the professional ITU designations may be used. The bandwidth is expressed as four characters: three digits and one letter. The letter occupies the position normally used for a decimal point, and indicates what unit of frequency is used to express the bandwidth. The letter H indicates Hertz, K indicates KiloHertz, M indicates MegaHertz, and G indicates GigaHertz. For instance, “500H” means 500 Hz, and “2M50” means 2.5 MHz. The first character must be a digit between 1 and 9; it may not be the digit 0 or a letter. Adding E as last letter means estimated, e.g., 2k70E.
> see ITU‑R:‑R/terrestrial/workshops/wrs12/Miscellaneous/Appendix1.pdf

Column 10: Details
Contains additional information like name of a Mode (if known): e.g. MIL 188 – 141A (ALE), STANAG 4285, Olivia, LINK 11, Pactor; CIS-12; FT‑8 or any further helpfull information, e.g., “daily, almost daily, often”. TDoA radiolocations are reported as “area of xxx, in the region of xxx” (no coordinates).

Abbreviations used
aka = also known as | BC = Broadcast | BD = Baud, (or also Burst duration) | BRI = Burst repetition interval | BW = Bandwidth | ca = approximate | DF = Direction finding (radio location) | OTHR = over the horizon radar | FMCW = frequency modulated | continuous wave | FMOP = frequency modulated on pulse | PRC = People´s Republic of China | SH = Shift (Hz) | sps = sweeps per second | TDoA = Time difference of arrival | UI /unid = unidentified | vd = various dates | vt = various times.

IARUMS R1 monthly Newsletters

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Print This Page Updated on May 13, 2023

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