GLAST Large Area Telescope: I & T Peer Review EGSE/Online System Gamma-ray Large Area Space Telescope GLAST Large Area Telescope: I & T Peer Review EGSE/Online System Elliott Bloom SU-SLAC Subsystem Manager elliott@slac.stanford.edu 650-926-2469

Outline How subsystem work integrates with I&T Items that are deliverables. Flow of Flight SW test and GSE migration Engineering Models EM 1 (ACD, CAL, DAQ, TKR) EM 2 (DAQ, Test Bed) CU (I&T) FU (I&T, IOC) Command and telemetry Database Coordination Test Bed for Verification

Division of Responsibility GLAST Mission Coordinate with spacecraft vendor EGSE LAT Coordinate EGSE flow across subsystems ELECTRONICS EGSE hardware (except for workstation) & front end software I&T EGSE workstation, workstation software and support. I&T test, analysis, visualization, and script software SAS LAT event reconstruction software IOC Ultimate customer Elect. I&T Mission LAT IOC SAS ONLINE

EGSE Deliverables (Electronics + I&T Support) Hardware/Software support for various incarnations of I&T test-stands Engineering Model 1 (EM1). Delivered 12/02. Engineering Model 2 (EM2). Due 8/03. Calibration Unit (CU). Due 2/04 Flight Unit (FU). Due 5/04. Test-stand system composition Infrastructure (workstations, networking, crates, etc.) Test executive Graphical User Interfaces (GUIs) Databases and tools Data analysis tools Data archiver Test procedures Code management, release control and distribution Remote debugging tools

Migration EM-1: No FSW beyond hardware drivers Will be used for the EM test (cosmic rays, Van de Graaff photons) EM-1+: EM-1 plus additional code from FSW FSW for commanding, telemetry and housekeeping EM-2: Development platform for multi-tower support Embedded systems run FSW code Commanding will be done through a more realistic dictionary Event format changes from TEM/AEM output to FSW filter output Test bench scripts will still be able to be run CU: Four tower system used for the Beam Test at SLAC Limited ACD contribution Evolution of EM-2 Will need to handle external sources of data 1553, SSR and SIS communications not required to satisfy test FU/LAT: The complete system Communications through SIIS (1553 and SSR), and test point. Will need IOC/MOC-like interface. Test bench scripts will still be able to be run (via test point).

Subsystem I&T Test-stand Requirements and Schedule Type Number of instances Release date Development support EM1 4 Done Subsystem support 2 CAL+ 3 ACD + 4 TKR Integration Testing 1 SLAC DAQ hardware development Flight Software Testbed EM2 5/03 Calibration CU 2 3/04 Flight Unit I&T FU 10/04 EM1 includes TEM interfaces (LAT-COMM cards) EM2/QU/FU include SIS (Spacecraft Interface Simulator) and IPS (Instrument Power Supply)

EGSE & Online Software Real-time system Embedded processors running the VxWorks RTOS Data acquisition and control by Trigger & Dataflow system Gathering of Housekeeping quantities 3rd party data acquisition, e.g., during beam tests LAT Test Executive (LATTE) developed using Python, Qt and XML provides: Configuration management Commanding Online data acquisition, archiving and distribution Persistent data stored in FITS files Data quality and Housekeeping quantity monitoring Data visualization and analysis HippoDraw: a visualization tool.

Main Dataflow Ethernet EM1 EGSE Configuration Electronics/Online Online Workstation Test Exec Configuration Commanding Telemetry Event Processing Monitoring Visualization Data base Message logger Alerts Electronic log Subsystem/simulator Back door debug RS-232 Subsystem (or simulator) Central Database VME Chassis CPU Commanding Telemetry Monitoring Hardware Drivers AEM/TEM WAN Main Dataflow Ethernet Ethernet LAT-COMM External Trigger Ethernet Router and Firewall DC Power External Hardware

Testing LAT System: Tower EGSE LCB: LAT Communication Module Transistion-card: Trigger Module Power-PC Processor Flight Software TEM DAQ Assembly Tower Power Supply Assembly (1.5V/2.5V/3.3V/ 0-100V/0-150V) 28-V Power Supply Processor: Motorola Power-PC Flight Software PMCIA LAT Communication Board for LAT Communication Transition Board Trigger TEM DAQ Assembly TEM Power-Supply Assembly 28-V Supply LAT-TD-00861

GASU Based Configuration (EM-2) T&DF System (LAT) EGSE ACD or Sensor Simulator EGSE Crate CPU LCB WAN GASU 28 V Supply Central Database EBM VME AEM GEM Online Workstation TEMs Firewall Developmental configuration (subsystem hardware, software and system software) which has a GASU at its core. Baseline configuration leading to the Beam test (CU configuration. CAL, TKR or Sensor Simulator SLAC

Beam Test (CU) Configuration T&DF System (LAT) EGSE ACD or Sensor Simulator EGSE Crate CPU LCB WAN GASU 28 V Supply Central Database VME EBM AEM GEM Online Workstation TEMs Firewall Auxiliary contributor is for contribution 3rd party data (e.g., ESA reflective memory, etc.) to the LAT event data. This idea has not been signed off on with all concerned. External Data CAL, TKR or Sensor Simulator CPU LAT-COMM External Hardware SLAC VME

LAT Assembly Configuration T&DF System (LAT) EGSE Spacecraft simulator ACD or Sensor Simulator SIU CPU Discretes 1553 1553 WAN GASU LCB 28 V Supply Central Database EBM AEM SSR 3 EPUs GEM CPU Online Workstation LCB TEMs Firewall This configuration is used during LAT assembly when parts are constantly being added and tested during each step. Grayed out parts are attached last. (Animation should maybe show them becoming non-grayed out). Software on the SIU and EPUs is Flight Unit level. This configuration is used for Thermal Vac at NRL with all the grayed out items present. EGSE Crate Test Point on LAT EMI Skirt CAL, TKR or Sensor Simulator CPU LCB SLAC

Complete Flight Unit Configuration T&DF System (LAT) EGSE SSR 1553 Discretes Spacecraft simulator ACD or Sensor Simulator SIU CPU 1553 WAN GASU LCB 28 V Supply Central Database EBM AEM 3 EPUs GEM CPU Online Workstation LCB TEMs Firewall This is the final validation configuration prior to shipment to the spacecraft vendor. The EGSE crate can be added to assist in debugging this configuration as necessary. EGSE Crate Test Point on LAT EMI Skirt CAL, TKR or Sensor Simulator CPU LCB SLAC

FU On-Orbit Configuration T&DF System (LAT) Spacecraft ACD SIU CPU Discretes Central Database 1553 1553 WAN GASU LCB 28 V Supply EBM AEM SSR 3 EPUs GEM Firewall CPU LCB TEMs IOC Workstation Test Point on LAT EMI Skirt (Flight cover installed -Green Tag item) CAL and TKR MOC SLAC

Command and telemetry Database Coordination The command and telemetry database must be coordinated between FSW, I&T and IOC. IOC will build upon and maintain the software produced by I&T. The Schema describing commands and telemetry will written in a meta language (TBD, e.g., XML or MySQL) Schema design will be driven by the details of the ITOS and Astro RT data bases. We will have the ability to translate to either. The choice of META language may be influenced by the ease of creating/changing/maintaining the data base. The decision of META language and the database partially populated by IOC CDR.

Flight Software Test Bed - EGSE Verification Full DAQ set with EM2 hardware (identical interfaces and functionality as flight) Incremental built according to plan (complete test bed Feb04) All DAQ modules including 16 TEM’s TKR and CAL front-end electronics for 1 tower, front-end simulator boards for other 15 towers Harness like flight Full set of ACD EM2 electronics Spectrum Astro SC simulator TKR and CAL Electronics Simulators DAQ electronics module (DAQ-EM) Power-supplies for tower electronics Global-Trigger/ACD-EM/Signal-Distribution Unit* 3 Event-Processor Units (2+1 spare) Event processing CPU LAT Communication Board Spacecraft Interface Unit Spacecraft Interface Board (SIB): Spacecraft interface, control & data LAT control CPU LAT Communication Board (LCB): LAT command and data interface Power-Distribution Unit (PDU)* Spacecraft interface, power LAT power distribution LAT health monitoring 12 ACD Electronics Cards Spectrum Astro Simulator LAT EGSE

Extra Slides

Number of Registers per Block Quantities (1) 7 x 32-bits 4 GCCC Calorimeter Cable Controller 18 x 32-bits 1 GTIC Trigger Interface Controller 5 x 64-bits 1728 = 72 x 24 GTFE Tracker Front-End ASIC 2 x 64-bits 72 = 8 x 9 GTRC Tracker Readout Controller 6 x 32-bits 8 GTCC Tracker Cable Controller 3 x 16-bits 192 = 16 x 12 GCFE Calorimeter Front-End ASIC 8 x 16-bits 16 = 4 x 4 GCRC Calorimeter Readout Controller GTEM Tower Electronics Module Number of Registers per Block Total Number per TEM TEM Functional Block Totals: ~2000 ~10000

Number of Registers per Block Quantities (2) 11 x 16-bits 216 = 18 x 12 GAFE Calorimeter Front-End ASIC 43 x 16-bits 12 GARC Calorimeter Readout Controller 5 x 32-bits 1 GAEM ACD Electronics Module Number of Registers per Block Total Number per AEM AEM Functional Block Totals: ~200 ~3000 1 LAT = 16 TEMs + 1 AEM + 1 GEM = ~160000 + ~3000 + few registers = ~165000 registers

Multi-Tower and ACD System EGSE (EM2)

Transition Board

DAQ EGSE to support ACD FREE

Event Building/CPU Communications LAT GASU 20 Mbps GLT 20 Mbps AEM 20 Mbps Tower 0 20 Mbps ?? Mbps Tower 15 SSR 20 Mbps 160 Mbps EPU 0 Tx EPU 0 Rx 20 Mbps 160 Mbps EPU 1 Tx EPU 1 Rx 20 Mbps 160 Mbps SIU Tx SIU Rx

GASU SIU GASU EPU EPU CRU Command/Response RAD750 cPCI SIB LCB EB ? x ? bit registers PDU TEM0 cPCI SIB TEM1 TEM2 . . LCB TEM15 EB 31 x 32 bit registers EPU Event Builder RAD750 SIU In SIU EPU 0 In cPCI EPU 0 GEM (SIB) EPU 1 In EPU 1 22 x 32 bit registers 17 x 64 bit registers 19 x 96 bit registers 1 x 112 bit register LCB Merge SSR EPU RAD750 AEM cPCI (SIB) GEM LCB TEM0 Combinatoric Logic TEM1 Event Data TEM2 Event Data Fragments Command/Response . . Trigger Data TEM15 Trigger Data

T&DF Overall Architecture (not accurate) Tower Electronics Module Interconnect Function Event Processing Unit Spacecraft Tower PWR Mgt 16 ~4 P C I B U S Event Builder C O N T R L HSK/LRS Tower Front End Electronics TKR TKR ASICS Processor CAL CAL ASICS 1 CPU I/O Trigger Primitives ACD Front End Electronics ACD Electronics Function Global Trigger Function Spacecraft Interface Unit Tower PWR Mgt DAQ PWR Mgt C O N T R L C O N T R L HSK/LRS HSK/LRS P C I B U S ~4 CPU I/O ACD ACD ASICS TRG FIFO LAT I/O 1553 TRG Configuration Processor SSR Trigger Primitives Trigger Logic Spacecraft I/O Discretes Key Trigger Primitives: Event Data: Configuration/Housekeeping/Low Rate Physics Data: Trigger Message: All event fragments: Command, Configuration and Control:

Hardware hierarchy

Software hierarchy Tower Electronics Module AntiCoincidence Detector Electronics Module Global Trigger Electronics Module

Run Control State Diagram Reset Stopped Running Paused Setup Teardown Start run Pause Stop run Stop Resume

Run Control

HippoDraw Views (1)

HippoDraw Inspector

Housekeeping Monitoring

Message Logger

Block Diagram Tower EGSE

Read Schema simpleTemschema.xml read GTEM 0, GCCC 3, GCRC 0 selected

Write Schema GCCCs for TEM 0 added New GLAT, TEM 0 added

Write Schema GCRCs for GCCC 0 added GCFEs for GCCC 0, GCRC 0 added

Software block diagram Workstation (NT, Python, etc.) Embedded System (VxWorks) Disp. tools Command Client Command Server Network (LAN or 1553) Script Execution Engine Network Interface Network Interface Hardware Interface Processing Data Logger Event Data Client Event Data Server

System Block diagram Ethernet Debug LAT Online “IOC” CCSDS packets Power Discretes Analogs SSR 1553 “MOC” CCSDS packets Spacecraft Interface Simulator MOC simulator

Command Model Online/EGSE Test stand/Instrument Command Request Dispatch Raw Cmd Encoder Raw Cmd Decoder Raw Command Packet Raw Command Packet Raw to CCSDS CCSDS to Raw “IOC” CCSDS packets Open CCSDS Command Packet Open CCSDS Command Packet Open Restricted Obfuscator Deobfuscator “MOC” CCSDS packets NDA/ITAR Command Packet NDA/ITAR Command Packet

Telemetry Model (1) Test stand/Instrument Online/EGSE TEM Raw Data Packet Raw Data Packet Event Data Server Event Data Dispatch or AEM Only one TEM or AEM allowed in the system at a time

Telemetry Model (2) Test stand/Instrument Online/EGSE TEM Raw Data Filter (EPU) Event Data Packet Event Data Packet Event Data Dispatch … AEM Multiple contributors (TEMs, AEM, GEM, filter statistics, etc.) allowed

Telemetry Model (3) Test stand/Instrument Online/EGSE TEM Raw Data Filter (EPU) Event Data Compression Event Data Decompression Event Data Dispatch … AEM CCSDS Encoding Telemetry Data Packet Telemetry Data Packet CCSDS Decoding Multiple contributors (TEMs, AEM, GEM , filter statistics, etc.) allowed Development for EM-2 Will also be used for the CU beam test

EGSE: Front-End Data Simulator System uses 9 PC’s 8 PC’s for 16 TEM’s 1 PC for ACD Data transported to towers via high-speed data link; PCI bridge to local bus on simulator Data Simulators interface to TEM like CAL and TKR sub-system electronics CAL and TKR simulator board identical except code in FPGA’s Patch cable connect simulator to CAL and TKR TEM connectors Can operate TEM or LAT with data generated from simulations Data simulator board in layout

Verification & Test: Spacecraft Interface Use Spectro-Astro provided Spacecraft Instrument Interface Simulator (SIIS) Power Manual off-on switch Control & Data Handling (C&DH) MIL1553 Science Interface (LVDS) 1-PPS timing signal (LVDS) GBM GRB Candidate signal (LVDS) Discretes (CMOS) Analog Monitoring Present Plan is for SIIS to only provide primary interface can’t test prim-redundant interface response Timing accuracy of 1 PPS interface not sufficient to test timing interface performance Work in progress LVDS: Low-Voltage-Differential-Swing signaling

I&T Schedule Overview EM test March/April 2003 through September 2003 EM-1+ FSW coming August 2003 CDR May 2003 SIIS (Spacecraft Instrument Interface Simulator) April 2003 CU beam test April/June 2004 FU/LAT integration & Test June 2004/January 2005 Environmental testing at NRL February/May 2005 Ready to ship May/June 2005