Alpha Magnetic Spectrometer NASA DOE

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Alpha Magnetic Spectrometer NASA / DOE
AMS-02 Avionics Kennedy Space Center
(KSC) Functional Integration Test (FIT) Review
Tim Urban / ESCG April 14, 2005
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KSC Functional Integration Test (FIT)
Review Purpose
Alpha Magnetic Spectrometer NASA / DOE

• AMS-02 Cargo Integration Test Equipment (CITE)
  Test
• Functional end-to-end test of AMS-02 / STS
  interfaces
• Commands created by STS test systems to AMS-02
  J-Crate
• AMS-02 housekeeping data to STS test systems
• AMS-02 Payload Test and Checkout System (PTCS)
  Test
• Functional end-to-end test of AMS-02 / ISS
  interfaces
• Ground generated commands to AMS-02 J-Crate and
  ACOP
• ACOP generated commands to AMS-02 J-Crate
• AMS-02 science and housekeeping data to ACOP
• AMS-02 and ACOP down-linked science and
  housekeeping data

April 14, 2005
T. J. Urban / ESCG
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KSC FIT Review AMS-02 Hardware Tested
Alpha Magnetic Spectrometer NASA / DOE

• ACOP and J-Crate Engineering Models
• AMS-02 ground computers
• Payload Operations Control Center (POCC)
• Telescience Resource Kit (TREK)
• AMS-02 PDS was unavailable KSC 28 VDC power
  supply used
• Flight-like cable design build-ups
• Included build-up with Class I flight Passive
  Umbilical Mechanism Assembly (UMA) cable harness
• Verified cable designs

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review PTCS Test Schematic
Alpha Magnetic Spectrometer NASA / DOE
T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review PTCS Test Block Diagram
Alpha Magnetic Spectrometer NASA / DOE
T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Test Participants
Alpha Magnetic Spectrometer NASA / DOE

• KSC FIT supported by the following organizations
• KSC
• AMS-02
• AMS-02 Project Office (APO)
• Collaboration
• MSFC JSC
• Orbiter Interface Unit (OIU)
• Mission Operations Directorate (MOD)
• ISS Payload Integration (OZ)
• Boeing Communications and Tracking (CT)

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Test Team
Alpha Magnetic Spectrometer NASA / DOE
T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Test Results
Alpha Magnetic Spectrometer NASA / DOE

• KSC FIT was considered an engineering development
  test, to verify interfaces and command / data
  structures prior to flight implementation.
• Two cable (pin-out) errors were found
• RS-422 cable between AMS-02 and the Shuttle test
  bed
• 1553 cable for PTCS between AMS-02 and the ISS
  test bed
• Cable modifications made and verified by test.
• These design changes will be implemented for
  flight.
• Minor issues with some data formatting and
  configurations.
• PTCS APS encountered loss of sync with HRDL.
• Characterized during FIT, but exact cause still
  unclear.
• KSC created IPR (problem report) no. IP000765.

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Test Results (continued)
Alpha Magnetic Spectrometer NASA / DOE

• Remote Terminal (RT) address was not as expected,
  which necessitated a software change in JROM to
  accept the correct RT.
• Load testing of data systems was not possible due
  to inadequate systems for both Payload Data
  Services System (PDSS) and Ground Recording
  System (GRS).
• Test procedures developed and refined real-time
  with lessons learned.

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Test Summary
Alpha Magnetic Spectrometer NASA / DOE

• STS CITE Tests
• All communications functionalities and interfaces
  verified.
• After FIT, AMS-02 support for KSC CITE was
  discontinued, and will not be available for
  AMS-02 flight hardware integrated testing. Other
  testing capabilities are being investigated.
• ISS PTCS Tests
• All communications functionalities and interfaces
  verified.
• AMS-02 test team gained an improved understanding
  of ISS based command and data flow management.

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Follow-On Tests
Alpha Magnetic Spectrometer NASA / DOE

• HRDL-APS Loss of Sync
• Further testing to understand the sync anomaly
  and test solutions.
• Will be performed this year at JSC ISS Systems
  Integration Lab (ISIL) facility (See next
  slides).
• AMS-02 PDS Unavailability
• Power quality test requirements, location and
  schedule being identified at this time.
• AMS-02 SSRMS Configuration Interconnect
  Verification
• Will verify interfaces through flight cable
  harnesses for Power and Video Grapple Fixture
  (PVGF) to External Berthing Camera System (EBCS)
  to AMS-02 PDS, possibly 4th quarter of 2005.

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Follow-On Test - ISS Systems
Integration Lab (ISIL)
Alpha Magnetic Spectrometer NASA / DOE

• Test Objectives
• The exact cause of this problem was not
  understood by AMS or ISS test teams.
• Attempt to reproduce and quantify the loss of
  data problem.
• Develop an AMS-02 work-around in the event the
  data loss is repeatable.
• Test Description
• ACOP and AMS/ACOP hardware readily on hand in
  Houston.
• APS, HCOR, HRFM, TAXI Analyzer provided by ISS
  Systems Integration Lab (ISIL).
• Test procedures being developed.
• Test Status
• Require schedule inputs from AMS Collaboration
  team regarding foreign nationals
• Visa availability / renewal
• To support JSC and ISIL badging processes
• HCOR and HRFM are not currently located in the
  ISIL.
• All Issues should be resolved to support the
  planned test window of mid-June.

T. J. Urban / ESCG
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April 14, 2005
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KSC FIT Review Follow-On Test - ISS Systems
Integration Lab
Alpha Magnetic Spectrometer NASA / DOE
Configuration Diagram
APS
HCOR
HRFM
AMS-02/ ACOP
FEP
ACOP
TAXI Analyzer
ACOP - AMS Crew Operations Post AMS - Alpha
Magnetic Spectrometer APS - Automated Payload
Switch FEP Front-end Processor HCOR - High
Rate Communications Outage Recorder HRFM - High
Rate Frame Multiplexor TAXI Transparent
Asynchronous eXchange Interface
T. J. Urban / ESCG
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April 14, 2005