GLAST LAT ProjectMonthly Review, March 30, 2005 4.1.7 DAQ & FSWV1 1 GLAST Large Area Telescope:...

GLAST LAT Project Monthly Review, March 30, 2005

4.1.7 DAQ & FSW V1 1

GLAST Large Area Telescope:GLAST Large Area Telescope:

Electronics, Data Acquisition & Flight Software W.B.S 4.1.7

March Monthly Review

Gunther [email protected](650) 926-4257

Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope


4.1.7 DAQ & FSW V1 2

TEM/TPS Status & ScheduleTEM/TPS Status & Schedule

• Status– Two Flight Tower-Electronics Modules/Tower Power Supplies

• Both modules delivered to I&T – Qual unit

• All tests completed, one issue• On-board current measurement jumpy under certain conditions

– After some experimentation, traced it down to leakage between one of the current monitoring ADC connections and the tracker Bias voltage.

– Only see it when bias voltage is increased– Most likely cause: leakage path (assembly issue) between neighboring solder

pads were pig-tail is soldered to board– De-mated TEM and TPS, first measurements indicate it is TPS– Next step is opening TPS, but pig-tail is staked so not sure what can visually

be observed (need new MRB meeting)• Not seen on the two flight boards (A & B), likely cause is assembly issue (cleaning

of board?) on qual

– Balance of 19 TEM/TPS in assembly at vendor• 6 TEM and 4 TPS pre-coat at SLAC, being tested• Holding TPS supplies pending resolution of issue, see next slide

• Schedule– 4/17/05 Third to sixth TEM/TPS deliver to SLAC?– 4/27/05 Third/Fourth TEM/TPS deliver to I&T– 5/6/05 Fifth/Sixth TEM/TPS deliver to I&T– 7/26/05 Last TEM/TPS to I&T


4.1.7 DAQ & FSW V1 3

TPS IssueTPS Issue

• No issue on any of EM supplies• Qual supply showed (with load-testboard connected) 100mV-ripple on Cal 3.3V

digital, but only if turned on at elevated temperatures– If turned on cold, no issue even at 55C– If turned on warm, issue even at -40C– Turn-on issue

• Put qual supply on tower with 4 flight-lot (non-flight) CAL AFEE cards and 36 flight-lot (non-flight) TKR MCM cards

– No issue up to 75C (highest temp tested)– Additional observation (positive)

• Communication (configuration/event readout) between TEM/TKR/CAL worked over tested temps from 020C to 75C

• However temp tests with non-flight TPS but with flight components showed ripple/oscillation at above 65C for TKR 2.5Vdig and 1.5V with above tower

– Concern• Traced it down to low-ESR of flight-lot capacitors

– In process of simulating (non-trivial due to non-existence of accurate converter model)

– Measurements in progress look again at stability (network analyzer)– Might have to exchange a resistor to another value, tbd


4.1.7 DAQ & FSW V1 4

PDU Status and SchedulePDU Status and Schedule

• Schedule for proto-flight– 4/4/05: unit assembled, pre-coat, to be sent to SLAC for

testing– Mid to end April: unit fully assembled, ready for

environmental test• 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

• Tester– Designed analog mux card for TV test, fabricated, is in

assembly– Vacuum feed-thru plate on order, due next week– Vibration fixture fabricated


4.1.7 DAQ & FSW V1 5

GASU Status and ScheduleGASU Status and Schedule

• Status– Parts kitting

• Delay due to man-power shortage in kitting• Parts just delivered to Aeroflex

– Flight assembly was to start 3/20/05, delay (2 weeks)• Schedule for proto-flight

– Mid April + 2 weeks: unit assembled, pre-coat, ready for test– End April + 2 weeks: unit fully assembled, ready for environmental

test• 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

• Tester– Tester in design/debug– Designed analog mux card for TV test

• Lots of harness assembly in progress for these cards– Ordered 450-pin feed-thru for chamber, due next week


4.1.7 DAQ & FSW V1 6

SIU/EPU Status and ScheduleSIU/EPU Status and Schedule

• Status– Parts to be kitted– Board had to be refabricated due to coupon failures (fab now at DDI and Tyco for

risk/schedule mitigation)– Also reduced amount of copper in boards to simplify PCI connector assembly– Wave-solder connector assembly looks most promising, but has issues

• Requires another round of 5 boards to be assembled/analyzed before any flight assembly can occur (vary temperature profile, etc)

• Can only take place after back-plane boards are back from fab, in 10 days.• Schedule

– In next 2-3 weeks: assemble another set of PCI boards for testing• Analysis at GSFC• Decision for flight assembly

– 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

• Tester– In design


4.1.7 DAQ & FSW V1 7

HarnessHarness

• Harness in assembly, priority list with dates on web-page below

• http://www-glast.slac.stanford.edu/Elec_DAQ/DAQ-Hardware/LAT-Harness/lat-harness.htm


4.1.7 DAQ & FSW V1 8

VSC (Virtual Spacecraft Simulator)VSC (Virtual Spacecraft Simulator)

• System Design for VSC complete• All non-custom hardware to be for 4 systems on order

– Received two sets of GPS and MIL1553• Need to install antenna on roof, make it work, etc

– Balance of two sets first week of April• SSR hardware interface module‘s complete/tested• Need to design interface board for thermistor/RTD measurement function in space-craft

(temperatures/voltages usually monitored by SC)• VSC

– Queing/scheduling/1553 2/3 done– Goal to finish be end of next week

• Proxy Classes– CCSDS/Networking/Handlers 1/3 done– Goal to finish on 2 weeks

• FSW Test– Python, 1/3 done– Gola to finish in 2 weeks– FSW test groups has interface and is writing scripts against above

• Debugging of whole system to be done once all pieces are available• 2 VSC‘s for FSW/ISOC/I&T for data-flow lab• 2 VSC‘s for I&T to follow


4.1.7 DAQ & FSW V1 9

IssuesIssues

• TPS ripple issue• AUSTIN EEPROM DPA problems

– Don’t have schedule for new lot yet• Qualification of cCPI press-fit connector assembly using

solder process• Delivery issue with GASU PS Zener protection diode for ACD

voltage (April delivery, might eliminate the part)• Need to work on closing open FPGA review items


4.1.7 DAQ & FSW V1 10

Level 3 Milestone CountLevel 3 Milestone Count

4.1.7 Level 3 Milestones

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4.1.7 DAQ & FSW V1 11

Level 3 Milestone ListLevel 3 Milestone List

WPNO ActivityDescription

BaselineFinish

-2mVar-1mVar

DeltaBslnVar

EarlyFinish

4.1.7 ElectronicsElex Ground Support Equipment

Final EGSE incl S/C Sim, FSW-Elec to I&T 04/01/05 -15 04/22/05

TEM/PS A

Flight TEM Assy A: Elec to I&T 02/17/05 0 02/17/05A

Flight TEM PS Assy A: Elec to I&T 02/17/05 0 02/17/05A

TEM/PS B

Flight TEM Assy B: Elec to I&T 03/07/05* 0 03/07/05

Flight TEM PS Assy B: Elec to I&T 03/07/05* 0 03/07/05

TEM/PS 1

Flight TEM Assy 1: Elec to I&T 04/22/05 0 04/22/05

Flight TEM PS Assy 1: Elec to I&T 04/22/05 0 04/22/05

TEM/PS 2



TEM/PS 3



TEM/PS 4



FY05 FY06FEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJAN

© Primavera Systems, Inc.

Run Date 03/25/05 16:01

Data Date 03/01/05

GLAST LAT PROJECTLevel 3 Milestones

Baseline Variance (Organized by Subsystem)

LT-DZ: Baseline VarianceFL-D4: AV: Level 3 Milestones

Report #10Sheet 6


4.1.7 DAQ & FSW V1 12



BaselineFinish

-2mVar-1mVar

DeltaBslnVar

EarlyFinish

TEM/PS 5



TEM/PS 6



TEM/PS 7



TEM/PS 8



TEM/PS 9



TEM/PS 10



TEM/PS 11





Run Date 03/25/05 16:01

Data Date 03/01/05




Report #10Sheet 7


4.1.7 DAQ & FSW V1 13



BaselineFinish

-2mVar-1mVar

DeltaBslnVar

EarlyFinish

TEM/PS 12



TEM/PS 13



TEM/PS 14



TEM/PS 15



TEM/PS 16



Elex Global Items

Flight PDU Box-Elec to I&T 07/01/05 0 07/01/05

Flight Harness-Elec to I&T 07/05/05 0 07/05/05

Flight GASU Box-Elec to I&T 07/19/05 3 07/14/05

LCB Flight Units - Elec to Elec 07/20/05 0 07/20/05

Flight Event Processor Units-Elec to I&T 08/19/05 0 08/19/05



Run Date 03/25/05 16:01

Data Date 03/01/05




Report #10Sheet 8


4.1.7 DAQ & FSW V1 14



BaselineFinish

-2mVar-1mVar

DeltaBslnVar

EarlyFinish

Elex Global Items

1st Flight EPU/SIU-Elec to I&T 08/19/05 0 08/19/05

2nd Flight EPU/SIU-Elec to I&T 08/24/05 0 08/24/05

3rd Flight EPU/SIU-Elec to I&T 08/26/05 0 08/26/05

4th Flight EPU/SIU-Elec to I&T 08/30/05 0 08/30/05

5th Flight EPU/SIU-Elec to I&T 09/02/05 0 09/02/05

Flight Software

Demo: Spacecraft Interfaces 02/14/05 0 02/14/05A

Demo: Thermal Control 02/16/05 0 02/16/05A

Demo: Inter-task Communications 03/11/05 0 03/11/05

Demo: Housekeeping 03/18/05 0 03/18/05

Demo: Event Filtering 03/23/05 0 03/23/05

Demo: Watchdog 04/15/05 0 04/15/05

Demo: Mode Control 04/22/05 0 04/22/05

Demo: Charge Injection Calibration 04/29/05 0 04/29/05

Demo: Event Integrity and Delivery 05/06/05 0 05/06/05

Demo: Diagnostics 05/06/05 0 05/06/05

Demo: GRB Detection and Response 05/20/05 0 05/20/05



Run Date 03/25/05 16:01

Data Date 03/01/05




Report #10Sheet 9


4.1.7 DAQ & FSW V1 15

Milestone Variance ExplanationMilestone Variance Explanation

• Schedule Impact• Cost Impact• Corrective Action

– None


4.1.7 DAQ & FSW V1 16

Cost ReportCost Report

Reporting Cost Incurred/Hours Worked Estimated Cost/Hours to Complete Estimated Final Unfilled

Category Cost/Hours Orders

During Month Cum. to Date Detail Balance of Contractor Contract Outstanding

Actual Planned Actual Planned MAR05 APR05 Contract Estimate Value

4.1.7 ELECTRONICS

4.1.7 ELECTRONICS 0 0 353 354 0 0 1 354 354 0

4.1.7.1 ELECTRONICS MANAGEMENT 67 172 1,771 1,735 51 46 200 2,069 2,069 12

4.1.7.2 RELIABILITY & QUALITY ASSURANCE 3 54 223 220 0 0 -3 220 220 0

4.1.7.3 ELECTRONICS SYSTEM DESIGN 0 -43 733 733 0 0 0 733 733 0

4.1.7.4 DATAFLOW ELECTRONICS (TEMs + PROCESSOR FARM)149 935 9,137 9,167 469 290 901 10,797 10,797 389

4.1.7.5 SPACECRAFT INTERFACE UNIT 29 7 1,543 1,518 20 110 583 2,256 2,256 205

4.1.7.6 POWER CONDITIONING 17 335 1,892 1,902 81 179 223 2,375 2,375 186

4.1.7.7 ENCLOSURES 60 -9 634 642 0 0 8 642 642 14

4.1.7.8 CABLE HARNESS 10 -280 270 254 91 143 145 649 649 255

4.1.7.9 FLIGHT SOFTWARE 277 279 4,758 4,898 183 144 750 5,835 5,835 0

4.1.7.A EGSE & OPERATIONS 1 1,383 2,490 2,535 37 1 45 2,573 2,573 17

4.1.7.C INSTRUMENT INTEGRATION & TEST 11 -444 26 58 51 46 269 392 392 3

CAPW[3]Totals: 623 2,390 23,829 24,016 981 961 3,123 28,894 28,894 1,081


4.1.7 DAQ & FSW V1 17

FTE Report FTE Report (DOE/NASA-funded only)(DOE/NASA-funded only)

4.1.7 Electronics

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GLAST LAT ProjectMonthly Review, March 30, 2005 4.1.7 DAQ & FSWV1 1 GLAST Large Area Telescope:...

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