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1PFP IPDR 2010/6/14 - 16
Particles and Fields Package (PFP)GSE
Timothy Quinn
2PFP IPDR 2010/6/14 - 16
Agenda
• Requirements Process• System Overview• Test Scenarios• Test Network Design• Schedule
3PFP IPDR 2010/6/14 - 16
Requirements Process
• Derived from hardware and software specifications– 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
4PFP IPDR 2010/6/14 - 16
System Overview
• The main components of the MAVEN GSE will be:
– 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
8PFP IPDR 2010/6/14 - 16
System Overview - MISG
9PFP IPDR 2010/6/14 - 16
System Overview - MISG
10PFP IPDR 2010/6/14 - 16
System Overview - MISG
11PFP IPDR 2010/6/14 - 16
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
16PFP IPDR 2010/6/14 - 16
System Overview - SSG
17PFP IPDR 2010/6/14 - 16
System Overview - SSG
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System Overview - SSG
19PFP IPDR 2010/6/14 - 16
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
20PFP IPDR 2010/6/14 - 16
Test Scenarios
21PFP IPDR 2010/6/14 - 16
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
22PFP IPDR 2010/6/14 - 16
Test Network Design
23PFP IPDR 2010/6/14 - 16
Schedule
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