ROCSAT-2

Current Status of ISUAL Project

Yeou-Shin Chang of NSPO

Jyh-Long Chern of NCKU

Henry Heetderks of UCB

October 3, 2001

ROCSAT-2

Current Status

Development of the ISUAL Fabrication and Initial Testing of the Spectrophotometer ETU is complete

System taken to Colorado mountain for testing with actual sprites Sprites successfully detected with expected sensitivity Cosmic ray contamination problem identified Circuit modifications being made to reject cosmic rays

Assembly of the ETU Sprite Imager is nearly fully complete The ETU CCD camera system with its electronics is in final checkout stage All mechanical parts made for both ETU and flight units ETU is fully wired with all circuit boards, heaters, thermistors, motor, etc. The optics system is fully complete except for gluing of the CCD to the Taper

» This task has been delayed due to failure of UCB’s vendor to successfully deposit a mask onto the taper. UCB is now doing this in house with good results so far.

ETU Filter wheel life testing is in process

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Current Status

Development of the ISUAL (Continued)

AEP ETU Fabrication and checkout is in process Mechanical design is complete and all ETU and flight unit parts made Power System fabrication and checkout is complete DPU circuit board fabrication is complete with checkout in process Mass Memory board fabrication is complete with checkout in process DCM ETU board is being checked out at NCKU The final board in the AEP, the Instrument Data Control (IDC) board does not yet hav

e a final circuit design» Completion of this design requires a final design for the SP cosmic ray rejection

circuits, and also requires a final ICD between the AEP and the Array Photometer

Array Photometer Development UCB finally has AD Ltd. Of Japan under contract!!!!!!!!!!!!! We very nearly have an agreed ICD between UCB and AD/Tohoku AD is going ahead with the mechanical and circuit design

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Current Status

Development of the ISUAL (Continued)

ISD has been completed and is ready for use in Astrium testing NSPO engineer is currently at UCB reviewing ISD test procedures and results Export license for temporary export of ISD to France is in place NSPO engineer will accompany ISD to France and will perform bench tests a

nd support spacecraft level testing using ISUAL ISD

IGSE Systems Status Hardware complete and checked out for two systems Initial software is operational One system will stay at UCB, the other will temporarily go to Astrium Actel development system is set up

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Current Status (con’t)

Science Data Distribution Center Incorporating the CCSDS standard in data format Studying the telemetry commands for the ISUAL operation Reviewing CDF Skeleton Table for ISUAL data Evaluating data query functions and schemes for the ISUAL data

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Issues and Concerns

Thermal Control Design- Survival Heater Lines incorporated into instrument design

TM and TC ICD

Harness Routing