Program: WGS
Wideband Gapfiller Satellite, now Wideband Global Satellite
US military satellite program to augment the DoD communication services
currently provided by the
DSCS program.
Will also replace the GBS payload of
UHF.
Other countries have joined the american system: Canada, Australia, Denmark,
Luxembourg, the Netherlands, New Zealand. Each nation has guaranteed access to
independent communications channels drawn from frequencies that are
internationally regulated for government use.
The contract was granted to a team led by Boeing (others include Harris Corp.,
ITT, Logicon, and SAIC). The 2 first satellites ordered are worth $336.4
million but the contract could reach $1.8 billion if the 6 options are
exercised.
The capacity of a single satellite is greater than the capacity of the entire
DSCS
constellation.
Initial launch was planned for 2004 on a Delta 4.
In Feb 2002 a second satellite was ordered for $119 million. To be launched in
2005.
In Dec 2002 a third satellite was ordered from Boeing, To be launched in
2005.
In Oct 2006, the
WGS SV 4
satellite was ordered (for launch in 2011). Its a Block 2 satellite, with radio
frequency bypass capability.
The
WGS SV 7
was ordered in Aug 2010 for $182 million.
Canada joined in Jan 2012 and paid for the 9th satellite.
WGS SV 10
was ordered in July 2012. Includes the new wideband digital channeliser.
WGS 11 is expected for late-2023.
Lookup sat-index archive
Specifications
X-band
Ka-band
WGS has 18 reconfigurable coverage areas, the ability to broadcast or multicast
transmissions into the various coverage areas, and connect users between any
and all coverage areas, even when operating on different frequency bands.
Supports crossbanding between X- and Ka-band.
WGS can filter and route up to 4.875 GHz of instantaneous bandwidth.
Depending on the mix of ground terminals, data rates, and modulation schemes
employed, a WGS satellite can support data transmission rates between 2.4 and
3.6 Gbps.