Pyxis Receiver and
CICERO Space System Progress
Chris McCormick
Broad Reach Engineering
[email protected]
15 April 2011
October 2010
1
We’ve been busy, Over 14 Launches to date,
9 more nearing completion
XSS-11
2005
TacSat-2
Minotaur 2006 Minotaur
Avionics Avionics, FSW
GPS Rx, 2 P/L
COSMIC
2006 (6x)
Minotaur
GPS Rx
Classified
2006 Delta-II
Avionics
WV-1/2
2007/2009
Delta-II
Payload Electronics
LRO
Advanced
2009 Atlas V
EHF
Gimbal Drivers
2010, Atlas
TerraSAR-X
P/L Avionics
2006 Dnepr
GPS Rx Space Station
Tandem-X 2011 Japan
H2/ATV
2010
Gimbal Drivers
October 2010
STP-SIV 1
2010
Minotaur
Avionics
Aquila
2011
Minotaur
Avionics
Glory
2011
Taurus P/L
Avionics
2
The Highlights
Focus on S/N, Latency, Quality and Quantity of soundings
Designed for Operational Requirements
High Reliable, Radiation Tolerant components and designs
L1/L2/L5 RF ASIC and Galileo Enabled processing
Real Time Data- Latency measured in seconds
Quantity 24 s/c & GPS + Galileo, Persistence of system
Spacecraft Status
Instrument Status
October 2010
3
Spacecraft Attributes
~40kg Small Satellite (about 55cm x 50cm x 35cm)
Attitude Determination Star Camera, Gyro, Magnetometer
3-Axis Stabilized via 3 Wheels and 3 Magnetic Torque Rods
5 Liter ADN “Green” Propellant, 3 Thrusters ~300m/sec
Deployed Solar Array – 70W OAP
Li-Ion Batteries (28V,12AHr)
Primary Downlink via GEO, 475/464 kbps (Inmarsat SB-SAT)
Secondary maintenance link with USN/Prioranet
Integrated Avionics (similar to AMS, XSS-11, STP-SIV 1&2)
GPS RO & CTIP Payloads
5+ Year On-Orbit Lifetime (expected > 10 years)
October 2010
4
Spacecraft Status
Updates from October 2010 design review
Changed from GPS-AD to Star Camera
Attitude Knowledge improvement from 0.2 deg. to 0.005 deg.
Have first prototype camera (at Space Symposium)
Flight version in development, lower power than GPS-AD
Received first EM Li-Ion Battery
Received first flight fuel tank & thrusters
Finished development of the Mirideon/440 card
10 cards built, some out on demo, others used for GPS & SB-Sat
Testing so far in the 200MFLOPS, more ‘tuning’ needed
BSP improvements, memory access improvements & options
Change from the SpaceX F1e
Was 2 launches of 12 each, now reconfiguring
October 2010
5
Spacecraft Status cont’d
Flight Software
Purchased Octant Technologies
flight S/W & Guidance and Control experts,
auto-code tools & visual navigation experts (star tracking
algorithms, proximity operations)
Primary engineers that designed S/W for many our past missions
Tested some of the CICERO design and mission
particulars with the Advanced Plug and Play demo for
USAF (final delivery May 2011)
October 2010
6
Spacecraft Status cont’d
Real Time Data SB-SAT (DARPA/Inmarsat contract)
First 5 Inmarsat modem boards out of manufacturing next
month (May 2011)
one 440 uP, two DSP’s, memory etc.
First testing with Inmarsat network later this summer
Protocol Stack (~3G phone style) porting to 440 uP
Modulation/Demod Software Defined Radio port to DSP
RF Front end prototyping in work, COMDEV UK
First High Gain antenna “Type 6” ~15 dBic 475kbps this
summer
All on track for Type Approval & Flight Delivery next year
October 2010
7
Space System Overview
October 2010
8
Avionics
Interface & Power
Electronics with LEO
and GEO Heritage
Typical “heritage”
Avionics from BRE
BRE Radiation Hard
PowerPC 440 CPU
October 2010
CICERO Avionics
Prototype
9
Spacecraft Overview
S-Band
Antenna
Reaction
Wheels (3x)
Avionics & Payload
Electronics
Li-Ion
Batteries
Antenna
Pointing
Mechanism
Magnetic
Torquers
(3x)
Inmarsat
Terminal
5 Liter
Propellant
Tank
Magnetometer
CTIP
PropSystem
Piping
S-Band
Transceiver
October 2010
S-Band
Antenna
Rocket
Engines (3x)
10
Propulsion System Panel
Prop panel integrated at prop vendor (Moog)
Interfaces to S/C via single power/data interface
Delivered to S/C I&T as one tested unit
.
Interface Envelop
Specification as
given to Moog
October 2010
Prop System
Assembly shipped
to I&T
Prop System
Integrated into
spacecraft bus
11
Spacecraft Overview
0.48m
0.35m
0.54m
Deployed Configuration
October 2010
12
Development Status
October 2010
13
Pyxis RO
Pyxis - GNSS Radio Occultation Receiver
Evolution from IGOR/IGOR+
Developed by Broad Reach
4 Antennas, GPS & Galileo
Radio Occultation Data
Pyxis
IGOR+
11.3
[4.44]
~2 dB more sensitive front end than COSMIC
Updated L1/L2 RF front end for PAZ
3 freq ASIC next for Pyxis-RO
24.0
[9.45]
DIMENSIONS ARE IN CM [INCHES]
RF ASIC development in fast track now
New code developed over the past year
Setting up P/L interface user requirements
Still working on publishing science interface w.r.t 3rd
party Open Loop routines
October 2010
14
19.5
[7.68]
GPS Flight Products
High Reliability, High Performance
Pyxis
new
Navigator
new
IGOR
Retired soon
2 and 3 Frequency GPS
Receivers And Sounding
Instruments.
October 2010
Single Frequency GPS Receivers
3U format for LEO and GEO applications
GEO version pictured. ~7 meter accuracy
at GEO
15
RO Antennas
Improved antenna design from COSMIC
Higher Gain ~ >2dB better over volume of interest
“Banana” Pattern to maximize gain, minimize thermal noise
Passively phase steered to accommodate S/C geometry
Ground Plane & Thermally coupled to structure
COSMIC Antenna
& Pattern
October 2010
CICERO Antenna
& Pattern
16
Congratulations on the 5 years
Proud to have been a part of it all
Thank You NSPO,
Thank You UCAR,
Thank You JPL
October 2010
17