LION NavIgatOr - Astrium

LION Navigator
multi-constellation and multi-frequency GNSS
receiver for space applications
Based on Astrium Products’ heritage in the development of HiRel space
GNSS receivers, the new generation navigation receiver “LION Navigator”
delivers high performance supporting both multiple frequency reception
and multiple navigation constellation operation. Advances in navigation
signal processing technology enable the development of a next generation
of navigation receivers. GPS is being modernised, providing more civil
signals, and first Galileo test satellites are already in orbit. Therefore, the
new Astrium Products’ LION Navigator is designed to make use of the GPS
signals L1, L2C, and L5 and of the Galileo signals E1, E5a and E5b, as well as
Glonass and Compass open signals*. 36 channels in parallel are available to
track all satellites in view.
The LION Navigator is designed to demodulate the navigation data messages
of the GNSS constellations navigation signals and to use this information for
PVT determination through an instant point-solution as well as through a
dynamic Kalman-filtered solution.
The LION Navigator reaches a very high level of integration and performance
thanks to the use of an ASIC as the core of the receiver. This ASIC (AGGA-4),
developed by Astrium Products’ under ESA contract, gathers in a single chip a
modern GNSS baseband processor, a LEON-FT as a fault-tolerant microprocessor
with FPU, a FFT module and digital interfaces (1553, UART, SpW).
* on request for Glonass and Compass
Key features
• Multi-Constellation Receiver:
- Galileo
- modernised GPS
- GLONASS, Compass using interoperability of Galileo
and GPS
• Multi-Frequency Receiver:
- L1/E1 Band
- L2C Band
- L5/E5 Band
• Multi-Use:
- Platform
- Payload (Scientific Receiver)
• High precision real time performance using 36
channels
• Centimetre post-processing capability on ground
• Available in different configurations from single to
quadruple frequency
• Compatibility mode to the interfaces used by Astrium
Products’ MosaicGNSS receiver
Main application field
• LEO, MEO and GEO satellites
Interfaces
• Communication
• Up to 4 antennas capability
• Power supply 18-60 V
MIL-STD-1553 Bus,
SpaceWire, UART
Performances
• Accuracy < 2 metres 3D RMS LEO
(triple freq.) < 2.5 mm/sec 3D RMS LEO
Time
50ns pps
Budget
• Mass
5 kg (without antenna,
RF harness and LNA)
200mm x 140mm x 205mm
< 20 W
• Volume
• Power Consumption
• Complete cold redundancy in one box
Environment
• Temperature
• Radiation
• Life time
-20 ˚C to +50 ˚C (operating)
-30 ˚C to +60 ˚C (non-operating)
50 krad total dose
15 years
All the space you need

LION Navigator assembly
The typical complete redundant LION Navigator assembly
is composed of:
• Two LION Navigator Receiver Units
• Two LNA Units
• Two GNSS Antennas
• Associated RF cables between above components
Up to four GNSS Antennas can be connected to each nonredundant
LION Navigator Receiver Unit, e.g. for scientific
applications.
The communication options for the fully redundant
connection with the onboard computers are:
• MIL-STD-1553 Bus
• Cross-strapped SpaceWire
• Cross-strapped UART
LION Navigator architecture
GNSS
Antenna
L
N
A
RF Frame
Clock
Module
RF
Front-End
L1 L2 L5
Power
Converter
Digital Board
:
LION Navigator Assembly with MIL-STD-1553 Bus
Antenna A
LNA A
Antenna B
RAM PROM EEPROM
GNSS
Core
PPS
Space
Wire
AGGA-4
UART
LNA B
LION Navigator
Redundant Box
Receiver
Unit A
Receiver
Unit B
LION Navigator Assembly with cross-strapped SpaceWire or UART
LEON
CPU
MIL
STD
1553
SpaceWire or UART
Cross-Strapping
Onboard
Computer
A
Onboard
Computer
B
PDH-9 / Non-contractual document, subject to changes. This document shall not be reproduced, in whole or in part, without prior consent. © 2012 Astrium [Ltd/SAS/GmbH]
LION Navigator
LION Navigator Receiver Unit
The LION Navigator is based on the AGGA-4,
which comprises a complete GNSS core with
36 baseband channels, the LEON-FT as a
fault-tolerant micro-processor together with a
FPU, a FFT module and digital communication
interfaces (MIL-STD-1553, UART, SpaceWire). On
its digital board it is complemented with RAM,
Boot Loader PROM, and an EEPROM to store the
GNSS Application.
The modular design of the RF frame provides
for each GNSS frequency a narrow-band RF
front-end.
A central OCXO provides the highly precise
reference clock to all modules.
Optional add-on services
• Mission analysis, specific compatibility tests
• EGSE for closed loop testing
• AOCS integration and hardware
accommodation support
• Pre-& post-launch maintenance
• Operator training
Contact:
astrium products
products@astrium.eads.net
www.astrium.eads.net