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email over HF using RSX.25 and GM2X00 waveforms (R&S PostMan II)
I had already met the "combined" Rohde & Schwarz RSX.25 ARQ protocol + GM2X00 waveforms some time ago, in that case UUCP sessions were exchanged between German BPOL patrol boats and the ashore...
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use of the radio address format "RSPeer" for direct delivering of messages...
This post can be considered as a continuation of the previous one in which the use of Rohde & Schwarz PostMan was shown: in that post, rsmail sending "classic" email over HF, was analyzed. In order...
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BPol vessels tracking using RSX.25 and GM2X00 waveforms (R&S PostMan II)
Quoting R&S PostMan II brochure "[...] another feature is the capability to track mobile stations by using the global positioning system (GPS). If a station is equipped with a GPS receiver,...
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STANAG-5066 Annex G, the ancestor to US MIL STD 188-110B and STANAG-4539
The other day I was still trying to figure out something from the burst signals discussed here and here and on that occasion I was using Harris's RF-5710A HF modem. Turning between the various...
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(some) October logs
06205.0: ELETTRA11: Italian Ny, I 0822 USB/J3E radio-check with IBIS11 (11Oct18) (AAI)06690.0: BD9: Unid (Moroccan-Pol ?) 0632 USB 188-141 2G-ALE calling T4N (24Oct18) (AAI)06733.0: 6628: Ascott-6628...
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two interesting FSK catches: 74.5Bd /250 and 75Bd/200
1) FSK 74.5Bd/250Some FSK 74.5Bd/250 short transmissions (Fig. 1) have been heard on 11018.0 KHz (CF) sending the same seven bits pattern in postive and in negative polarity (Fig. 2). Since the short...
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LINK-11 CLEW, Hamming check matrix
The check of a Link-11 CLEW stream discussed in the end part of this post, can be speed up by using the Hamming check matrix for the H(30,24) coding, ie a 30-bit code word consisting of 24 bits for...
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IP over HF via STANAG-5066 RCOP, MIL 188-110A as HF waveform
Interesting transmissions spotted on 9105.0 KHz/usb at 1240z, user/locations are unid, maybe form US-Mil stations? The transfer concerns IP-over-HF (IPoHF) via STANAG-5066 RCOP protocol [1]: 1380 bytes...
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email over hf using FED-1052 DLP and "IDEA" encryption (2)
Yet another interesting catch of an email-over-hf session using FED-1052 Datalink Protocol (DLP, Appendix B) and IDEA encryption. The transmission was recorded on 09187.0 KHz/usb 1357z: encrypted MIL...
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two interesting MFSK catches
1) MFSK-66 (33+33) 40Bd/40 (presumed)Transmission heard on 9122.0 KHz/usb on 20 November, 0832z. It looks like they use 2-tones x symbol and a manipulation speed of 40 Bd (Fig. 1). Dividing the...
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8-ary constellation bursts at 12800bps data rate (2)
Some other observations and updates about the S4539 12800bps 8-ary constellation already discussed here: this post was possible thanks to the collaboration of my friends AngazU, Christoph, Martin...
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STANAG-5065 MSK300, LF shore-to-ship surface broadcast
Nice catch of a STANAG-5065 MSK300 signal picked up by a colleague using the Alicante Kiwisdr on 145.0 KHz. By the way, we wish here to thanks the owner of Alicante kiwisdr for his kindness allowing...
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XMPP over HF radio using STANAG-5066
Interesting transmissions spotted on 4381.0 KHz and 4833.5 KHz (all usb) consisting of MIL 188-110A Serial HF waveform (fixed 600bps/S) and 6-bit code clear text (6x28) & STANAG-5066 as bearer for...
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CIS-79 "TANDEME" OFDM 79-tone
CIS-79 "tandem", OFDM 79-tone spotted on 10790.0 KHz/usb with bad SNR value. The signal is formed by 80 sub-carriers but the higher one (#80) is zeroed and unmodulated. The waveform uses QAM-64...
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STANAG-5030/MIL-188-140 VLF/LF multichannel broadcast to submarines (tentative)
The Navy ashore VLF/LF transmitter facilities transmit submarine command and control broadcast which is the backbone of the submarine broadcast system. The VLF/LF radio broadcast provides robustness,...
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some recent (unid) catches in the 8 MHz band
STANAG-4285 async operationsTransmission heard on 8167.0 KHz/usb consisting of S4285 600bps/L transfer. After demodulation, the bitstream reveals ITA2 5N1.5 async operation with encrypted data and...
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9MR - Malaysian Navy, uncommon FSK shift and ITA2 framing
(a joint analysis by me and ANgazu) 9MR 9/10/13 RMMJ MRB MRB RYRYRYRY 9MR 9/10/13 RMMJ MRB MRB SGSGSGSGSG AR JULL JULLis the Id & "RY/SG" test tape transmitted by 9MR Royal Malaysian Navy (RMN)...
View Articlelast logs of 2018
04833.5: ---: Unid, prob. UK MoD 2114 USB MIL 188-110A serial tone waveform, testing XMPP multi-user chat over HF using STANAG-5066 RCOP protocol. Also logged on 4381.0 Khz. (07Dec18) (AAI)05290.0:...
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unid 1200Bd (G)FSK bursts recorded in Japan
This signal was recorded at different periods using some the KiwiSDRs located in Japan (http://103.2.34.7:8073 http://222.7.151.84:8073http://kiwisdr-jp7fso.ddns.net:8073), it was observed, at least,...
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