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Alpha Magnetic Spectrometer
Alpha Magnetic Spectrometer-02
ISS Digital Data Recording System(DDRS)
ISS DDRS Project / ESCG Team
Alpha Magnetic Spectrometer
Agenda
• Background
• Objectives
• Description
• Interface Diagram
April 26, 2010 ESCG 2
Alpha Magnetic Spectrometer
April 26, 2010 ESCG 3
BACKGROUND
From:http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-91.html
• The Alpha Magnetic Spectrometer (AMS) flew for the first time on STS-91 and was powered up on Flight Day 1.
• Data originally planned to be sent to ground stations through Discovery's KU-band communications system was recorded onboard because of a problem with the KU-band system.
• Data that could not be recorded by ground stations was recorded onboard throughout the mission.
• Less than <5% of the AMS-1 data made it to the ground by S-Band.
• On the last STS mission, Shuttle Ku Band was out of commission.
Alpha Magnetic Spectrometer
ESCG 4
OBJECTIVES
• Nominally: Provide a recording of the science data as close to the source as possible.– Contingency: Provide a means for the ISS crew to observe operational
data of AMS-02.– Contingency: Provide a means for the ISS crew to command the AMS-02
payload.
• ISS DDRS command path to AMS-02 is via High Rate Data Link. In the event ISS data systems or ground commanding are unavailable AMS-02 can be completely operated from this alternate interface.
April 26, 2010
Alpha Magnetic Spectrometer
ESCG 5
• ISS Digital Data Recording System description:– Based on a NASA provided T61p ISS laptop, dedicated for AMS use– Would provide primary on-board data recording (24/7)– Would provide play-back capability to downlink lost or corrupted data– Uses ISSLAN Joint Station Lan (JSL) connection– Crew hard-disk change-out minimized by over-writing data on the AMS disk
once it is verified on the ground - only used to prolong H/D life.
• Ensures data integrality if the event of ISS data systems and/or payload outages.
• Allows for contingency crew monitor of payload status and contingency crew commanding of payload systems via “Fn” keystrokes, based upon procedures, flight notes or A-to-G voice-loop.
• AMS02 ISS DDRS is a CB / STS-134 crew request.
AMS-02 ISS DDRSDescription
April 26, 2010
Alpha Magnetic Spectrometer
AMS-02 ISS DDRS Interfaces
ESCG 6April 26, 2010
AMS-02 ISS DDRS INTERFACESPart Names reflect OpNom
AMS LAPTOP SEG33120761-301
Enhanced A31p 16V DC Power Cable SEG33116459-301
DC Power 28V DC Cable Assembly
SEG39129264-305
J1 - 28VDC
AMS USB Cable SEG39137981-801
Nominal configuration: AMS HRDL Cable
SEG39136091-301(Length: 8 ft)
UIP
AMS Hard Drive Adapter
SEG33120741-301
16 VDC Power (P1)
J7 - HRDL
P7
P2P1
AMS Hard Drive
SEG39137974-801
AMS USB Cable SEG39137981-801
P2P1
AMS Transmitter Adapter
SEG39136090-301
TxUSB
A31p 28V DC Power Supply
SEG33116428-301
P2
P1
RJ45 - Network
EXPRESS RACK 6
PS28 Junction Box
SEG33114658-301
P1 P2
J2 J1
P1 P2 P1
MDL 3
J2 – DATA
(Network)
MDL 3
USB
USB
P1
AMS Cable Kit SEG39137975-301
Alternate configurations; not part of AMS Cable Kit: AMS Short Extension Cable
SEG39138001-301(Length: 6 ft)
AMS Long Extension CableSEG39138001-302
(Length: 40 ft)
AMS Receiver Adapter
SEG39136090-302
RxUSB
J4
Desk Top Plate Assembly SED33108703-304
Multi Use Bracket Assembly
SEG33107631-301
Location Assumption: MDL 3, Locker 8, Drawer 2, Seat track
RED = Assumptions or To Be DeterminedBlue = AMS-02 ISS DDRS Project deliverables
J5
P2
PS28 Cable Assembly
SEG33114659-301
28 VDC, 20 AMP Adaptor Cable Assy
SEG33112598-301
P1P2
PS28 Power Strip Assembly
SEG33114657-301
AMS Network JackAssembly
SEG39137984-301
AMS Network CableSEG39138002-801
(Length: 9 ft) Alternate length: 40 ft; SEG39138002-802)
Alpha Magnetic Spectrometer
ESCG 9April 13, 2010
ISS DDRSInstallation Concept
SEG39138002-3019 ft
SEG33112598-301
SEG33114659-301
SEG33114658-301
SEG33116428-301
SEG39129264-305
SEG33116459-301
SEG33120761-301
SEG39136091-3016ft
SEG39137981-801 (2X)3ft
SEG39136090-301 / -302
SEG33107631-301 andSED33108703-304
Alpha Magnetic Spectrometer
Documentation Updates
• G5787B - T61p GCAR • add new components: alternate HDDs, cables, adapters.
– CRCP to provide checklist to T61 Interface
• JSC 64268 - T61p PTRS – no changes• JSC 64267 - T61p IRD – no changes; Memo
documenting how ISS DDRS HW meets Section 4. • MATL-08-016-USA_R1 - Materials Analysis – update
to apply to new HDDs & Cables
ESCG 10April 13, 2010
Alpha Magnetic Spectrometer
AMS-02 ISS DDRS Requested Certification Hardware
ESCG 11April 13, 2010
Certification Testing Class 1 COTS Class 3 Provided By
T61p Laptop 1 2 ISS
T61p 160 GB C: Hard Drive(Prime installed) 1 2 ISS
T61p Internal Battery(installed) 1 2 ISS
T61p Ultrabay Adapter Assy(installed) 1 2 ISS
T61p Firmware/BIOS 1 2 ISS
T61 Power Supply 1 2
T61p Ultrabay Adapter Assy1 2 ISS
Alpha Magnetic Spectrometer
AMS-02 ISS DDRS GFE Provided Parts/Materials
ESCG 12April 13, 2010
Certification Testing Part Number Qty Provided By
T61p Laptop SEG33120761-301 1 ISS
T61p 160 GB C: Hard Drive(Prime installed) SEG33120738-301 1 ISS
T61p Internal Battery(installed) SEG33120739-301 1 ISS
T61p Ultrabay Adapter Assy(installed) SEG33120741-301 1 ISS
T61p Firmware/BIOS SKG33120762_C 1 ISS
T61p 160 GB D: Hard Drive(uninstalled data spare) SEG33120738-301 3 ISS
T61p Ultrabay Adapter AssySEG33120741-301 1 ISS
PGSC DC PWR cable SEG33116459-301 1 ISS
DC PWR SUPLY SEG33116428-301 1 ISS
DC PWR SUPLY cable SEG39129264-305 1 ISS
PS28 Power Strip Assembly SEG33114657-301 1 On-orbit
PS-28 Junction Box SEG33114658-301 1 On-orbit
PS28 Cable Assembly SEG33114659-301 1 On-orbit
28 VDC, 20 AMP Adaptor Cable Assy SEG33112598-301 1 On-orbit
Desk Top Plate Assembly SED33108703-304 1 ISS
Multi-Use Bracket Assembly SEG33107631-301 1 ISS
Alpha Magnetic Spectrometer
Deliverables: Hard Drive Assumptions
• AMS Hard Drive (SEG39137974) (7 of -801; 3 of -802)– COTS; 500GB or more
– Acceptable alternate to (160 GB) SEG33120738-301
– Conformal coating to protect exposed circuitry on AMS drives
– Compatible with Windows XP, AMS software
– Compatible with SKG33120762 Firmware/Bios Configuration
– Certification by similarity: EMI; no vibe, no thermal
– Ionizing Radiation testing – Engineering eval only (Preferred HD
+ 2 alternate HDs)
– GCAR functional testing: with T61p at SCTF lab
– TPS: Sharp edges, burrs, labeling, cleanliness
– AMS data & S/W is stand-alone and not part of the HD cert effort
ESCG 13April 13, 2010
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Certification Approach:• Modify existing T61p laptop Government Certification Acceptance
Request:– Existing T61p GCAR is Criticality (Crit) 1– AMS-02 ISS DDRS added to T61p GCAR as Crit 3 H/W and Crit 3 function
• AMS-02 ISS DDRS delivered per AMS process: DD-250 and JR-1027 ADP• Testing:
– EMI testing: (ISS levels: emissions and susceptibility)• USB Adapters• HDD may be by similarity, memo
– Ionizing radiation susceptibility – mission success - engineering eval testing only
– Early engineering evaluation functional at SCTF SVF– Interface Verification Testing @ KSC test-bed with AMS Payload
• Analysis– Materials analysis memo (flammability, out-gassing, toxicity)
AMS-02 ISS DDRS - Certification
April 13, 2010
Alpha Magnetic Spectrometer
ESCG 15April 13, 2010
ST FiberConnector
USBConnector
ISS DDRS Design Statususb/HRDL Adapters SEG39136090-301 / -302
Labels will differentiateTransmitter & Receiver
•Purpose: Converts HRDL fiber signal to USB (one each transmit and receive).
•Design: Aluminum extruded housing, conformal coated PCB.
•Materials: IVA compatibility assessment to be performed.
Alpha Magnetic Spectrometer
ACRONYMS
ESCG 16
Acronym Description/Meaning
AMS Alpha Magnetic Spectrometer
COTS Commercial Off-the-shelf
DDRS Digital Data Recording System
EMI Electro-magnetic Interference
ESCG Engineering Science Contract Group
ESD Electrostatic Discharge
GFE Government furnished equipment
HDD Hard Disk Drive
HRDL High Rate Data Link
ISS International Space Station
ISSLAN ISS Local Area Network
MDL Mid-deck Locker
PWR Power
PDA Pre-Delivery Acceptance
PIA Pre-Installation Acceptance
TIM Technical Interchange Meeting
UIP Utility Interface Panel
USB Universal Serial Bus
April 13, 2010