| In developing its
global mobile satellite business Inmarsat has acquired a wide
range of in-house skills. Our satellite operations capacity
is on offer under contract to outside companies and organizations. |
| |
| With its current 10-satellite
constellation and network of ground control and support facilities,
Inmarsat has all the experience, expertise and tools to supply
a range of spacecraft management services to other operators. |
| |
| Inmarsat's TOPS (Transfer Orbit
and Payload testing Support) programme offers competitive pricing,
flexible contracting and proven capability. |
| |
| The highly qualified teams based
at Inmarsat's Satellite Control Centre (SCC) in London and three
tracking, telemetry and control (TT&C) stations in Italy,
China and Canada have built an impressive record in recent years,
playing a key role in post-launch transfer-orbit operations
for: |
| |
All four Inmarsat I-2 satellites
in 1990-1992
All five Inmarsat I-3s in 1996-8
More than 10 satellites for external customers from 1998 |
| |
| As well as operating the Inmarsat
constellation, the teams have the capacity to offer two main
services to third parties: |
| |
- Transfer-orbit TT&C support
- In-orbit testing of C and L-band communications payloads
|
| |
| Inmarsat launch support facilities
comprise: |
| |
- three full-motion C-band antennas located in Fucino (Italy),
Beijing (China) and Lake Cowichan (Canada)
- their associated RF, IF and baseband equipment
- a digital communications network
- the Satellite Control Centre (SCC), backed up by fully
redundant facilities at a separate location.
|
| |
| Transfer-Orbit TT&C
Support
This service can be tailored to meet specific customer requirements,
including some or all of these functions: |
| |
tele-command and telemetry
tracking and ranging
flight dynamics
data and voice links via Inmarsat's TT&C (telemetry,
tracking and control) communications network (remote LAN
access can be provided)
|
| |
| The flight dynamics part of the
service covers: |
| |
processing of azimuth, elevation and range tracking
data
generation of orbits
production of antenna pointing element sets (APES) files,
to be used during satellite acquisition and for program
track operation
predictions of azimuth, elevation, slant range and Doppler
eclipse predictions
|
| |
| In-Orbit Testing
Using its existing in-orbit testing (IOT) facilities, Inmarsat
can supply these services in C and L-band: |
| |
commissioning of new satellites' communications payloads
routine satellite payload measurements
communications traffic measurements
Earth station validation tests
|
| |
| Bands covered are L-band transmit
(1623-1664MHz), L-band receive (1500-1580MHz), C-band transmit
(5900-6470MHz) and C-band receive (3570-4215MHz). |
| |
| Automatic measurements include
single and multi-carrier EIRP and C/I, frequency, gain, G/T,
axial ratio, frequency response, phase linearity, phase noise,
spurious outputs, EIRP and frequency stability. All measurements
can be made on-demand and individually or as part of regular
pre-programmed sequences. Accuracies are of the order of +/-0.4dB
(1 sigma) for power measurements, +/10Hz (1 sigma) for frequency
measurements. |
| |
| Inmarsat's IOT facilities include
two 13m C/L-band multifunction antennas and associated measurement
systems located in Fucino, Italy, and Beijing, China. Computer
terminals and peripherals located at Inmarsat headquarters support
fully remote operation of both systems. |
| |
| The Inmarsat IOT service is available
to geostationary satellites stationed within the arc 58 degrees
W to 189 degrees E. |
Buy BGAN and RBGAN Service
