Alpha Magnetic Spectrometer-02 ISS Digital Data Recording System (DDRS)

1. Alpha Magnetic Spectrometer-02 ISS Digital Data Recording System (DDRS) ISS DDRS Project / ESCG Team

2. Agenda • Background • Objectives • Description • Interface Diagram 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-91and 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. 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. ESCG

5. AMS-02 ISS DDRSDescription • 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. ESCG

6. EXPRESS RACK 6 AMS-02 ISS DDRS Interfaces Enhanced A31p 16V DC Power Cable SEG33116459-301 DC Power 28V DC Cable Assembly SEG39129264-305 PS28 Cable Assembly SEG33114659-301 A31p 28V DC Power Supply SEG33116428-301 PS28 Junction Box SEG33114658-301 MDL 3 J1 - 28VDC 16 VDC Power (P1) J4 J5 J2 J1 P1 P1 P2 P2 P2 P1 P2 P1 28 VDC, 20 AMP Adaptor Cable Assy SEG33112598-301 PS28 Power Strip Assembly SEG33114657-301 MDL 3 P1 AMS Network Cable SEG39138002-801 (Length: 9 ft) Alternate length: 40 ft; SEG39138002-802) RJ45 - Network J2 – DATA (Network) AMS Hard Drive Adapter SEG33120741-301 AMS Network Jack Assembly SEG39137984-301 AMS Hard Drive SEG39137974-801 P1 P1 P2 AMS Transmitter Adapter SEG39136090-301 AMS USB Cable SEG39137981-801 USB USB Tx UIP Nominal configuration: AMS HRDL Cable SEG39136091-301 (Length: 8 ft) P7 J7 - HRDL AMS LAPTOP SEG33120761-301 Alternate configurations; not part of AMS Cable Kit: AMS Short Extension Cable SEG39138001-301 (Length: 6 ft) AMS Long Extension Cable SEG39138001-302 (Length: 40 ft) P1 P2 P2 AMS Receiver Adapter SEG39136090-302 AMS USB Cable SEG39137981-801 USB USB Rx Desk Top Plate Assembly SED33108703-304 Multi Use Bracket Assembly SEG33107631-301 AMS Cable Kit SEG39137975-301 Location Assumption: MDL 3, Locker 8, Drawer 2, Seat track AMS-02 ISS DDRS INTERFACES Part Names reflect OpNom RED = Assumptions or To Be Determined Blue = AMS-02 ISS DDRS Project deliverables ESCG

7. BACKUP SLIDES ESCG

8. ISS DDRSInstallation Concept ESCG

9. ISS DDRSInstallation Concept SEG33116459-301 SEG33120761-301 SEG39138002-301 9 ft SEG39136090-301 / -302 SEG33112598-301 SEG39137981-801 (2X) 3ft SEG33107631-301 and SED33108703-304 SEG39136091-301 6ft SEG33114659-301 SEG39129264-305 SEG33116428-301 SEG33114658-301 ESCG

10. 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

11. AMS-02 ISS DDRS Requested Certification Hardware ESCG

12. AMS-02 ISS DDRS GFE Provided Parts/Materials ESCG

13. 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 SCTFlab • TPS: Sharp edges, burrs, labeling, cleanliness • AMS data & S/W is stand-alone and not part of the HD cert effort ESCG

14. AMS-02 ISS DDRS - Certification 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) ESCG

15. ISS DDRS Design Statususb/HRDL Adapters SEG39136090-301 / -302 • 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. Labels will differentiate Transmitter & Receiver ST Fiber Connector USB Connector ESCG

16. ACRONYMS ESCG