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Gamma-ray Large Area Space Telescope. DOE Review 4.1.7 DAQ. GLAST Large Area Telescope: G. Haller SLAC [email protected] (650) 926-4257. Contents. Overview - Production & Testing - Schedule TEM/TPS Flight Units PDU Flight Units GASU Flight Units SIU/EPU Flight Units Testbed - PowerPoint PPT Presentation
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GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 1
GLAST Large Area Telescope:GLAST Large Area Telescope:
G. HallerSLAC
[email protected](650) 926-4257
Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope
DOE Review DOE Review 4.1.7 DAQ 4.1.7 DAQ
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 2
ContentsContents
• Overview - Production & Testing - Schedule– TEM/TPS Flight Units – PDU Flight Units – GASU Flight Units– SIU/EPU Flight Units
• Testbed• Installation & Test Support• Budget
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 3
LAT ElectronicsLAT Electronics
3 Event-Processor Units (EPU) (2 + 1 spare)
– Event processing CPU– LAT Communication Board– SIB
ACD
empty
EPU-3
EPU-2EPU-1
empty empty
Power Dist. Unit*
GASU*
empty
empty
SIU*SIU*
Spacecraft Interface Units (SIU)*
– Storage Interface Board (SIB): Spacecraft interface, control & telemetry
– LAT control CPU– LAT Communication
Board (LCB): LAT command and data interface
16 Tower Electronics Modules & Tower Power Supplies
* Primary & Secondary Units shown in one chassis
Power-Distribution Unit (PDU)*
– Spacecraft interface, power
– LAT power distribution
– LAT health monitoring
Global-Trigger/ACD-EM/Signal-Distribution Unit*
TKR
CAL
TKR Front-End Electronics (MCM)ACD Front-End Electronics (FREE)
CAL Front-End Electronics (AFEE)
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 4
TEM/TPS Mounted to CAL TEM/TPS Mounted to CAL
LAT GRID with 16 CAL/TEM/TPS Modules
TEM
TPS
CAL
TKR not shown
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 5
Tower Electronics Module (TEM) before coating/staking
• Tower Electronics Module: Main DAQ module, one on each tower
– Controls and reads out data from TKR MCM and CAL AFEE front-end electronics
– Assembles CAL and TKR event fragments to tower event
Tower Electronics Module/Tower Power SupplyTower Electronics Module/Tower Power Supply
• Tower Power Supply module, one on each tower– Input 28V– Generates low-noise voltages for
• TKR (2.65V analog, 2.65V Digital)• CAL (3.3V analog, 3.3V digital)• TEM (3.3V and 2.5V digital)• TKR Bias (20V-140V programmable)• CAL (20V to 90V programmable)
Tower Power Supply (TPS) before coating/staking
Shown upside-down
TEM
TPS
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 6
TEM/TPS Status & ScheduleTEM/TPS Status & Schedule
• Status– Three Flight Tower-Electronics Modules/Tower Power Supplies
received• Fully assembled• Thermal-cycled• Vibration tested (one of them to qualification levels)• One unit finished thermal-vacuum testing• One unit in thermal-vacuum testing• Both units finished EMI/EMC testing• No issues/problems
– Balance of 19 TEM/TPS in surface-mount assembly at vendor• Schedule
– 2/17/05 First TEM/TPS to I&T– 2/25/05 Second TEM/TPS to I&T– 4/1/05 Third TEM/TPS to I&T– 4/22/05 Fourth TEM/TPS to I&T
• One week lag between delivery of consecutive assemblies– 7/26/05 Last TEM/TPS to I&T
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 7
PDU & GASU Mounted on LAT PDU & GASU Mounted on LAT
GASU
PDU
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 8
EM PDU enclosure with primary/redundant PDU circuit cards, no coating/staking
• Primary and Redundant Circuits in one Enclosure– Receives Primary and Redundant 28-V from spacecraft– Each, primary and redundant PDU can select between
primary and redundant spacecraft power– Filters 28V– Turns on/off 28V to 16 towers and 3 EPU’s under
program control– Protects PDU and down-stream circuits from over-
current and under-voltage • Over-current via poly-switches• Under-voltage via custom circuit in each power-
on branch – Receives command/clock from GASU– Digitizes voltages/temperatures from > 150 sources
• Includes temperatures from radiators, GRID; used for thermal control
– Reads back data to SIU via GASU– Provides PDU DAQ voltage and temperature analog
data to spacecraft for monitoring
Power Distribution Module (PDU)Power Distribution Module (PDU)
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 9
PDU Status and SchedulePDU Status and Schedule
• Status– Design/documentation complete– Enclosures fabricated– All parts received (except recalled International Rectifier
regulator, due end of February)– Assembly contract awarded– All parts kitted and audited by assembly vendor– Assembly started
• Schedule for Flight Unit– 5/15/05 Precoat PDU assembly ready for electrical test– 5/30/05 Complete assembly ready for environmental test– 7/1/05 Flight PDU to I&T
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 10
PDU enclosure with primary/redundant PDU circuit cards, no coating/staking
• Primary and Redundant Circuits in one Enclosure– Contains two types of circuit card assemblies
• GASU Power Supply CCA• GASU DAQ Board CCA
– GASU Power Supply• Receives 28-V supply voltages for
– Primary and redundant DAQ board, generates 3.3V and 2.5v
– ACD FREE cards» Filtering
for 28-V» 3.3V regulation
– GASU DAQ Board• Contains 9 FPGA’s• Includes Command Response Unit, Fan-out and
fan-in of commanding to 16 TEMs, PDU, EPU’s, ACD
• Includes Global Trigger Logic• Includes LAT Event-Builder Logic• Includes command/control/read-back for ACD
sub-system• Includes power-control for ACD FREE Boards
GASUGASU
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 11
GASU Status and ScheduleGASU Status and Schedule
• Status– Design/documentation complete– Enclosures fabricated– All components/parts received – Assembly contract awarded– Parts being kitted– Flight assembly to start 3/10/05
• Schedule for Flight Unit– 5/20/05 Precoat GASU assembly ready for electrical test– 6/10/05 Complete assembly ready for environmental test– 7/13/05 Flight GASU to I&T
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 12
SIU/EPUSIU/EPU
Enclosure Backplane
Power-SupplyCPU
SIB
LCB
• Spacecraft Interface Unit (SIU)• Event Processor Unit (EPU)• Difference is boot code loaded into RAD750 CPU
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 13
SIU/EPU Status and ScheduleSIU/EPU Status and Schedule
• Status– Design/documentation complete– Enclosures fabricated– All components/parts received except BAE RAD750 CPU
• Uses recalled International Rectifier regulator• Boards to be sent back to BAE• Reworked boards expected 3 weeks after they receive
components; June 05– Assembly contract out for RFP
• Schedule– 6/1/05 Precoat cCPI boards ready for electrical test– 7/28/05 Complete assembly ready for environmental test– 8/19/05 First Flight SIU/EPU to I&T– 8/24/05 Second flight SIU/EPU to I&T– 8/27/05 Third flight SIU/EPU to I&T– 8/30/05 Fourth flight SIU/EPU to I&T– 9/2/05 Last flight SIU/EPU to I&T
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 14
Testbed and I&T SupportTestbed and I&T Support
• Testbed– Upgrade of engineering modules to reflect flight designs– Scheduled over next 6 months– Labor to support upgrade– Labor to support testing of electronics and flight software
using data generated via front-end simulator boards– Labor to support test-stands for flight electronics
qualification and acceptance testing• I&T Support
– Design/fabrication/testing of virtual spacecraft simulator for I&T
– Support for integration and testing of DAQ modules on instrument
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 15
Management & EGSEManagement & EGSE
• Management– Sub-system manager– Technical writer– Support for environmental test – Travel– Computer for test-stations (HW & SW) maintenance– Shipping charges for flight hardware
• EGSE (Electrical Ground Support Equipment)– Maintenance/repair of test-stations supplied to sub-
systems
GLAST LAT Project DOE Review, February 18, 2005
4.1.7 DAQ & FSW V1 16
Costs & CommitsCosts & Commits
Explanation:
Dataflow Electronics = TEM/TPS Flight Units
ACD GASU FU & GLT FU = GASU
Power Conditioning = PDU
SIU & LAT Communication Card = SIU