SolarB EIS EUV Imaging Spectrometer Consortium Meeting June

Solar-B EIS EUV Imaging Spectrometer Consortium Meeting, June 99, BU A System View of EIS Matthew Whyndham, MSSL Hirohisa Hara, NAOJ Consortium Meeting 9906 - System View of EIS - MWT 14 -15 June '99 (BU)

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Outline j MWT j HH y The core technical y The Solar-B requirements Spacecraft and y EIS subsystems its environment (components) + y EIS interface documents information y EIS interfaces report (to MELCO) y Flow of interface information y Spacecraft Development y Status of the subsystems schedule y EIS Development Schedule y Mass Budget y Power Budget y Envelope y Data flow – sensors to ground 14 -15 June '99 (BU) 2

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Core Technical Requirements Essential … we must achieve these: y. Deliver Science y. Conform to Spacecraft Accommodation y. Feasible design (cost, schedule and risk) Desirable: these factors are to be considered where possible: yenhancements to science return ytechnology development (strategic directions) ynice ideas 14 -15 June '99 (BU) 3

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Science Requirements 14 -15 June '99 (BU) 4

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer EIS Subsystems - Components x. A definitive list of subsystems is given in the “System Hierarchy” document : EIS-sys-des-hierarc - e. g. hierarc 3. pdf on the web Is there a document which explains the nature of each subsystem in relation to the whole and the functionality of each element and the responsibility for its design and manufacture? - NO, not yet ! x. But see “System Hierarchy” and “Master Interface List” EIS-sys-des-mintlist x. The system block diagram is “EIS Physical View” EIS-sys-des-physview • This diagram does not show any dimensions x. These are core documents and will be maintained 14 -15 June '99 (BU) 5

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer System Hierarchy 14 -15 June '99 (BU) on the web 6

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer EIS Interfaces y. Flight Equipment x. External - with spacecraft x. Internal - between components x. Internal - same institute x. Test / GSE - non-flight configuration y. Ground Segment similar breakdown … y. Master Interface List only shows Flight (External, Internal) x. Test and Ground Segment interfaces not shown 14 -15 June '99 (BU) 7

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Master Interface List on the web 14 -15 June '99 (BU) 8

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Flow of Interface Information System Design Team (SDT) mailto: eis-tech cc: PI’s , Co-I’s 14 -15 June '99 (BU) 9

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Status of the subsystems 14 -15 June '99 (BU) 10

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer EIS Development Schedule 14 -15 June '99 (BU) on the web 11

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Mass Budget on the web 14 -15 June '99 (BU) 12

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Power Budget j. Estimate ypreliminary 6/99 y 45. 5 W y 84. 19 W Average Peak y. AJM -> detailed breakdown j. Allocation y? 14 -15 June '99 (BU) 13

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Envelope j. Quasi rectangular envelope assumed y 3200 X 250 X 550 ybased on strawman design y. Evolving. . . -> SM structure concepts jsize of thruster tank and space for momentum wheels may increase, the size and shape of bus structure will be affected by those. When the size and shape of bus structure change, EIS interface points will also be affected. The system side wants to know the size and shape of EIS structure by this reason. If there is a small room in the EIS envelope region which was sent on May 24, the system side can use it as a freedom for the bus structure. 14 -15 June '99 (BU) 14

Consortium Meeting 9906 - System View of EIS - MWT Solar-B EIS EUV Imaging Spectrometer Data Flow - Sensors to Ground j. Possible constraints of data flow y. FPA -> ICU y. ICU framestore -> ICU output packets y. ICU -> MDP x. MDP processing rate y. MDP -> DHU y. DHU capacity y. Ground station link y. Ground segment interfaces y. Explored in more detail later (Software, RAG) 14 -15 June '99 (BU) 15