Transcript MAVEN Site Visit Agenda

Particles and Fields Package (PFP)
GSE
Timothy Quinn
PFP IPDR 2010/6/14 - 16
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Agenda
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Requirements Process
System Overview
Test Scenarios
Test Network Design
Schedule
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Requirements Process
• Derived from hardware and software specifications
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Particle and Fields To MAVEN Spacecraft ICD
PFDPU to Instrument ICD
PFDPU Flight Software ICD
MAVEN Instrument/PFDPU Simulator ICD
PFP Instrument FPGA Specifications (LPW, MAG, SEP,
STATIC, SWEA, SWIA)
• Face to face meeting with PFP engineers and scientists
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System Overview
• The main components of the MAVEN GSE will be:
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MAVEN Instrument Simulator GSE (MISG)
Instrument Operations GSE (IOG)
Spacecraft Simulator GSE (SSG)
GSE Support Components
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System Overview - MISG
• MAVEN Instrument Simulator GSE (MISG)
– ZestET1 off-the-shelf module
• High-speed Ethernet (TCP/IP Offload) engine (TOE)
• Configurable (Xilinx) FPGA
– Instrument/PFDPU interfaces, along with the data flow and control are
implemented in the FPGA, which interacts with the TOE to transfer data
to/from the Host Computer
– Base (Interface) Board connects to the Zest-ET1 FPGA
• Provides buffers and connectors that match the MAVEN-PFDPU
flight configuration
• Houses the Actuator Control circuitry, controlled and monitored by
the Zest-ET1 FPGA
– Whenever possible, the MISG uses the actual flight design,
assuring that the simulated interfaces match the flight hardware
(The interface between the PFDPU and Instruments is a clocked
serial bit-stream)
– Communicates with IOG via TCP/IP
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System Overview - MISG
• MAVEN Instrument Simulator GSE (MISG)
– PFDPU test interface for instrument bench level testing
• Sends commands to and receives telemetry from the Instrument
under test
• Provides an independent but synchronous “high-speed” (8.34MHz)
clock for those instruments that require it and a power-supply synch
signal
– Instrument test interface for PFDPU testing
• MISG receives commands from and sends telemetry to the PFDPU
under test
• Simulated instrumenst include SEP, SWEA, SWIA, STATIC (1 and
2), MAG (1 and 2), and LPW instruments
• MISG telemetry production is impartial with respect to the
instruments; each of the nine units simulated is personalized via its
loaded pattern and operates synchronously to its own dedicated
clock supplied by the PFDPU. (In practice, these clocks are
1.048MHz, derived from the PFDPU Master clock.)
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System Overview - MISG
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System Overview - MISG
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System Overview - MISG
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System Overview - MISG
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System Overview - IOG
• Instrument Operations GSE (IOG)
– PC laptop running Windows 7 OS
– Telemetry and Command (T&C) control software using off the
shelf software GSEOS
• Operation is managed through the use of configuration files and the
Python scripting language
• UCB will make use of in-house development already done for the
RBSP and CINEMA projects. In particular, Python modules
developed for these projects will be used to:
– Ingest the Command and Telemetry Definition Document (CTM), an
excel spreadsheet, and convert it into all of the necessary GSEOS
command and telemetry definition files, telemetry limit files, conversion
formula definition files, and other GSEOS configuration files
– Supply a scripting interface for closed loop instrument control
– Additional advanced plotting capabilities using LabWindows/CVI
and/or IDL applications
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System Overview – IOG/GSEOS
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System Overview – IOG/GSEOS
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System Overview – IOG/GSEOS
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System Overview - SSG
• Spacecraft Simulator GSE (SSG)
– Hardware/Software that will simulate the spacecraft computer to
PFDPU serial interface protocol (RS422)
– Communicates with the IOG over a RS232 serial connection
– LabWindows (C) program running on IOG controls hardware and
will relay T&C control with GSEOS via TCP/IP
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System Overview - SSG
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System Overview - SSG
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System Overview - SSG
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Test Scenarios
• The MAVEN GSE will support 3 main test scenarios for
the PFP before it’s shipped off to the spacecraft
manufacturer for mission level I&T
– Instrument Bench
– PFDPU Bench
– PFP I&T
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Test Scenarios
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Test Network Design
• A generic “Test Network” will be developed with all of the
major components listed sitting behind a router
• GSE Software (GSEOS, python scripts, Labwindows
applications, IDL code, etc.) will be under version control
(SVN) and the main repository will be accessible via an
http server on the lab network
• Data collected during tests will be uploaded from the
IOG to a data server/archive also on the lab network
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Test Network Design
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Schedule
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