Wavecom W61PC V7.5.0 - Manual (Page 280)

270  SAT System WAVECOM Decoder W61PC/LAN Manual V7.5
Note: The information in the following paragraphs applies to the land mobile and maritime systems of-
fered by Inmarsat. The aeronautical services differ in channel naming, usage and system setup.
Systems
Over time new generations of satellites were launched into orbit, while new services were added. Current-
ly the third and fourth generation of satellites is in operation (3F, 4F). Inmarsat will also be the operator
of Alphasat planned for launch in 2012 which will provide L band services in Europe, Middle East and Africa
utilizing the expanded L band frequency ranges made available at WARC-03 (World Administrative Radio
Conference). The fifth generation is expected to start deployment in 2013 and will operate Ka band tran-
sponders for the new INMRASAT GlobalXpress VSAT service offering user bandwidths up to 50 Mbps.
Inmarsat started operations in 1982 with leased satellite capacity for the INMARSAT A system. The table
below shows the evolution of the various Inmarsat systems.
System Services Offered Introduction Max User Data
Rate (fax, data)
A Analogue voice, G3 fax, telex, data. Discontinued 1982 3 kHz, 9.6 kbps,
50 Bd, 56 kbps
Aero-H Digital voice, fax , data 1990 10.5 kbps
B Digital voice, G3 Fax, data, telex. To be discontinued
2015
1994 9.6 kbps
C Store-and-forward messaging 1992 600 bps
M Digital voice, G3/4 fax, data 1993 2.4 kbps
mini-M Digital voice, G3 fax, data. To be discontinued 2012 1996 2.4 kbps
D Forward paging 1996 20 bps
D+ Paging with return channel 1997 20 bps
E Emergency position indicating radio beacon (EPIRB). Dis-
continued
1997 600 bps
mini-M Digital voice, G3/4 fax, data 1997 2.4 kbps
Aero-I Digital voice, fax , data 1998 10.5 kbps
M4 (GAN) Digital voice, G3/4 fax, data, packet data 2000 64 kbps
R-BGAN Digital voice, G3/4 fax, data, packet data 2003 144 kbps
BGAN Digital voice, G3/4 fax, data, packet data 2006 464 kbps
Aero-C For the aeronautical mobile services , adapted from C
Swift64 For the aeronautical mobile services, adapted from M4
mini-M Aero For the aeronautical mobile services, based on mini-M
F77 For the maritime mobile service, based on M4, approved
for GMDSS, operates in global beams (-4 dB/k antenna),
options: 2.4 kbps G3 fax, 9.6 kbps G3 fax, 9.6 kbps async
data
F55 For the maritime mobile service, same as F77, but not
approved for GMDSS, operates in spot beams (-7 dB/k
antenna), except global 4.8 kbps voice codec, ISDN bear-
er services are optional and has no optional 2.4 kbps G3
fax
F33 For the maritime mobile service, (-12.5 db/k antenna),
global 4.8 kbps voice codec, optional spot beam 9.6 kbps
G3 fax, async data, MPDS