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W-SAT or W61SAT,
INMARSAT Option
WAVECOM
recommends to use the W61PC/LAN together with the W61SAT-Option.
The advantage of this combination is the SDR (Software Defined Radio)
of the W61PC. This feature makes it possible to build a reliable, optimized,
straightforward and cost effective monitoring system in combination with a
L-Band to 70 MHz down converter.
For
W-CODE an external receiver with IF output and hardware to convert the IF signal
to IQ-data is required.
The W61PC is the first choice to build a cost efficient satellite monitoring
system for INMARSAT due its onboard, tunable 70 MHz input (no external receivers are required).
Regarding the system requirements for a L-band monitoring system, consult our
application note.
For decoding a SNR of >15 dB (recommended 20 dB)
is required.
The SAT Option consists of:
EasySATSystem
A smart software, controlling multiple W61PC cards for the INMARSAT B, C, M
or mM modes. The control software is included in our W61SAT-Option. Up to 10 cards
may be simultaneously
controlled from our control software. Setup is done with a text
configuration file.
SatEmail Decoder
The SAT Email Decoder will decode the main message protocols encountered on
satellite and other communication links. These protocols reside on Layer 2, the
data link layer.
The SAT-Email-Decoder takes as its input a session file and the corresponding
data files, as produced by a WAVECOM decoder(other are decoders supported, or
any text file from an external source containing emails. After protocol decoding
and possible decompression, the email(s) and possible attachment(s) are output
as files(one directory per email).
The following mails systems are decoded:
- AMOS
- GlobeWireless
- GTMail
- Rydex
- Skyfile
INMARSAT
B
The W61PC monitors the control channel, and upon initiation of a new session
with a mobile terminal, it automatically switches to the assigned traffic channel
for monitoring. To limit the volume of monitored traffic, a watch list may be
created containing target MES IDs. Monitored fax, voice, telex and data
sessions are stored in files. A fax viewer is included with the application. Voice is
recorded in .wav files and streamed to the standard sound output of the system
for live monitoring.
INMARSAT C (TDM, TDMA, EGC)
With the SAT-C-TDM and SAT-C-TDMA mode, duplex data (forward and
return) traffic can be monitored.
The INMARSAT C satellite system has an inherent capability, known as Enhanced
Group Call (EGC), which allows broadcast messages to be made to selected groups
of ship stations. Two types of EGC services are available, SafetyNET and
FleetNET. Both systems are part of our SAT-C-TDM mode.
An Auto-NCSC mode allows to record the traffic for an particular MES. After
a channel assignment has been received, the decoder switches to the traffic channel and decodes the
traffic for the MES of interest.
INMARSAT M
The W61PC monitors the control channel, and upon initiation of a new session
with a mobile terminal, it automatically switches to the assigned traffic channel
for monitoring. To limit the volume of monitored traffic, a watch list may be
created containing target MES IDs. Monitored fax, voice, telex and data
sessions are stored in files. A fax viewer is included with the application. Voice is
recorded in .wav files and streamed to the standard sound output of the system
for live monitoring.
INMARSAT
mM
The W61PC monitors the control channel, and upon initiation of a new session
with a mobile terminal, it automatically switches to the assigned traffic channel
for monitoring. To limit the volume of monitored traffic, a watch list may be
created containing target MES IDs. Monitored fax, voice, telex and data
sessions are stored in files. A fax viewer is included with the application.
Unprocessed voice-packets are stored in binary .txt files. For miniM voice
playback, please enquire.
INMARSAT AERO-P
The W61PC monitors the Aero forward P-channel (control and forward messages) common
to all Aero modes (L, H, H+ and I). The
decoder is currently a beta version awaiting final completion and presents control and Data-3 messages in hexadecimal format
whereas as Data-2 (ACARS) is represented in clear
text.
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