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Unid PSK-2 signals 125.3Bd and 127.3Bd
These two PSK-2 signals has been heard on 12499.0 KHz (06 August, 2016) and 22499.0 KHz (10 May, 2016) on USB. Perhaps a coincidence but, unless a little variance of ~ 140 Hz, their central frequencies...
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Unid QPSK 2400Bd, single tone, burst system
the signal spreads 2800Hz bandwidth and consists of a "train" of packets, each consisting of an initial 200ms burst followed by four 425ms bursts; since the initial burst the signal looks like an ARQ...
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[188-141 2G-ALE]06320.0 Z1V: Slovakian Mil, SVK 0716 USB MIL 188-141 2G-ALE calling S1L (09Aug16) (AAI)08060.0 RS002: Macedonian Mil, MKD 0607 USB MIL 188-110ST carryng FED-1052 App.B data to CS003B...
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Chinese 4+4 π/4 DQPSK
Weak signal heard on 14021.3 KHz (cf) at 1450 UTC, just in the HAM 20mt band. The signal consists in two groups of four channels (4+4), the two groups are spaced by 450 Hz and channel separation is 300...
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FM13 weather reports messages in CW
Oceanographic and Hydrographic observations are sent daily by the Hydrographic ships of the Russian Navy at fixed times 00, 06, 12 and 18 UTC. Such messages are not sent directly to GSVMF ground...
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(yet another) email exchange via STANAG-5066 over MS188-110
I report this interesting catch since it's a link setup - forward - link down complete example and because it's formed of a bilateral email exchange between the peers.The 188-141 2G-ALE setup phase is...
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CIS-14 FSK 96Bd/1000 with T-207 encryption
The characteristics of CIS-14 FSK-2 are the 96 symbols/sec speed and the 14-bit length frame, in this recording the shift is 1000Hz. This signal has been spotted on 8009.8 KHz (cf) on 0624 UTC.fig....
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Ital-Mil FSK, FSK-2 1200Bd/800Hz
FSK-2 1200Bd/800Hz waveform, approximately 1500 Hz bandwidth, used by Italian Military; in this record it's used by Italian Navy HQ (IDR Rome) on 12200.6 KHz/USB as unusual intro before STANAG-4285...
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logs
[mix]07745.0 TBB: Turkish Navy Ankara, TUR 0520 USB STANAG-4285 600bps/L CARBs "//TBB040I(0)/TBB041I(0)/TBB043I(0)/TBB047I(0)/TBB045I(0)/TBB7I(0)/TBB046I(0)/TBB048I(0)/TBB049I(0)/TBB050I(0)//"...
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BRASS/MRL file transfer with STANAG-5066 and STANAG-4285
fig. 1a - STANAG-5066 in half-duplex modefig. 1b - STANAG-5066 in full-duplex modeI recently had the chance to analyze some interesting recordings from a two nodes BRASS-MRL test (MRL, orMaritime Rear...
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example of e-mail over HF using STANAG-5066 HMTP and STANAG-4285 as HF waveform
Looking at some my recent logs to which this post refers:05838.0 ABC7: Unid (poss. Bosnian net) 0734 USB MIL 188-141 2G-ALE ABS5 handshake, voice auth-id then STANAG-5066 HMTP over STANAG-4285...
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HF networks mapping from on-air signals
The aim of the post is to illustrate an "hand" method to draw HF networks from STANAG-5066 Protocol Data Units (PDUs) that are exchanged over HF radio between peer HF nodes: mainly, the DATA-ONLY type...
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logs
04015.0 ---: Unid (poss. Croatian) 0617 USB STANAG-4285 modified waveform (17Sep16) (AAI)04055.2 DHJ58/3: German Navy, D 0516 USB STANAG-4285 600bps/L continuous bcast (06Sep16) (AAI)04225.7 IDR:...
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PACTOR-IV ("Dragon" modem) BPSK/QPSK
PacTOR-IV transmission using BPSK and QPSK modulation and speed of 1800 symbols/sec (in both the cases), without the characteristic PacTOR-IV spreading factor used at lower data rates. The presence of...
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MIL 188-110C App.D: BW6 KHz, SR4800 Bd, Walsh
yet another 188-110C App.D signal (WBHF, Wide Band High Frequency) spotted around 1850 UTC on 5407.0 KHz/USB by my friend Karapuz: it worth noting the bandwidth of the signal, 6000Hz, and consequently...
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STANAG-4285 & HMTP-66 (HF Mail Transport Protocol) example
Other than (H)BFTP and CFTP, e-mails can be sent over HF using the protocol HMTP (HF Mail Transport Protocol) defined in STANAG-5066 Annex F and MIL 188-141B Appendix E. The HMTP protocol is used by...
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Thales Systeme-3000 analog voice scrambler
The scrambler has been heard on 5320.0 KHz/USB around 0700 UTC. It is recognizable by the two 2000 Baud OQPSK bursts preceeding and concluding the scrambled speech and by the charactistic 100Hz gap...
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cars, chamaleons, networks, and other stories (I)
For some days I monitored (and I'm still monitoring) some frequencies on 5 MHz band, hearing curious MIL 188-141A "cars" addresses such as OPELHFMREZA, VOLVOHFMREZA,...(here denoted asHFMREZA-net) as...
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TADIRAN AutoCall MFSK-4
signal heard on 5892.0 KHz/USB, 0758 UTC, most likely from Austrian Military. AutoCall is a proprietary ALE waveform by Israeli Elbit Systems "TADIRAN" communication system. AutoCall delivers faster...
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5MHz Logs
05025.0 FORDBRTP: Unid (prob. Bosnia Herzegovina Defense, BIH) 0739 USB MIL 188-141 2G-ALE calling FORD1BRTP (27Sep16) (AAI)05032.1 ---: Unid 0618 (cf) FSK 200Bd/160 acf 24bit (prob. telemetry?)...
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