ROCSAT-2

Current Status of ISUAL Project

Jyh-Long Chern of NCKUYukihiro Takahashi of Tohoku University

Henry Heetderks of UCB

February 28, 2002

ROCSAT-2Current Status at UCB

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 New PCB layout is complete and ETU and Flight boards have been etched New PCB is currently having parts installed

Assembly of the ETU Sprite Imager is fully complete Camera system electronics with all operating modes is fully checked out All mechanical parts have been made for both ETU and flight units ETU is fully wired with all circuit boards, heaters, thermistors, motor, etc. Flight unit and NSPO ETU sub-assemblies are now being wired and assembled Optics assembly problems have been solved

New tapers from Schott received and have very low defects Masks have been successfully deposited at UCB First flight intensifier/taper/mask/window/CCD assembly complete

We will make a total of 4 assemblies and pick the best for flight

ROCSAT-2Current Status at UCB

Development of the ISUAL (Continued) Imager ETU has been fully assembled Drawings for revised Thermoelectric Cooler system are nearly compl

ete Fabrication of new parts will begin week of 4 March

Life testing is underway on ETU Filter wheel with flight motor Unit has operated for the equivalent of five years on orbit under

vacuum at +45 deg C. Very little evidence wear on motor or gears

We are now setting up to do a similar test at -40 deg C.

ROCSAT-2Current Status at UCB

Development of the ISUAL (Continued) AEP ETU Fabrication and Testing has made substantial progress

Checkout of Mass Memory is complete DPU Checkout is mostly complete

Interface to AP is checked out and working Interface to Mass Memory is checked out and working Interface to Analog Telemetry System is fully checked out Interface to DCM is fully checked out Interface to High Voltage control system checkout is in process Interface to Spectrophotometer (IDC) is not yet complete

DCM has made great progress Hardware bugs on ETU board have been corrected with cuts and jumps and added components New board layout with circuit changes is being done at NCKU We believe we are very close to having BIOS software running in the DCM which will allow

compression code to be uploaded from the DPU and run in the DCM PCB layout of the final board in the AEP, the Instrument Data Control (IDC) board is now almost

complete We expect to have an etched board by 15 March

ROCSAT-2Current Status at Tohoku

Development of the AP AP ISD (AP interface testing model) and IGSE (Interface simulator for AP) were bo

ught to UCB and successfully tested Tohoku has delivered AP document package to UCB (part of Milestone 2 package

) "Milestone 1" has been confirmed and paid by UCB Schedule of environmental tests in Japan is under arrangement. It will be fixed in

a week. Radiation tests for some ICs and PMTs were conducted with a total dose of 30 K r

ad. No problem was detected.

ROCSAT-2Current Status at UCB

IGSE Systems Status Hardware is complete and two systems are operational

One is currently at UCB and the other is in France where it was used to support the successful testing of the ISUAL ISD

We had a nasty bug develop in the IGSE which caused occasional loss of science data packets

The problem appears to be due to a subtle bug in the operation of the National Instruments I/O boards which we are using to perform the simulated spacecraft interface

We have made software modifications which include switching from C++ based drivers to Labview drivers

This appears to have corrected the problem

ROCSAT-2Current Status at NCKU

Development of the DCM DCM (third version PCB) is used for software/BIOS/interface implementation

testing Technically, the design of the DCM ETU will be finalized in this version Code implementation with assembly language is working on We are trying to catch the schedule Overall, NCKU’s DCM should be done within this year

NCKU is scheduling to be at UCB in mid-December or early January for integration verification; after that ETU will be made at UCB (expected late January) and then flight model (expected February).

NCKU will deliver Hardware testing note Software code book DCM PCB (hardware) Complete DCM ETU design

ROCSAT-2Current Status at NCKU

Development of GSE GSE

Second version of Code book (GSE004) is complete Should be done by the end of this year Working on integration and testing with hardware

After finishing NCKU will deliver

Code book Testing Performance Evaluation Report

ROCSAT-2Current Status at NCKU

Optical Design and Testing Optical analysis on ISUAL CCD imager is complete Publication:

Books can be downloaded from web site: http://www.phys.ncku.edu.tw/optics

More technical information including codes can be found over the web

Currently, we have submitted three technical papers of optical analysis and got one paper accepted. More researches in the areas of optical analysis and blind image deconvoltuion are on-going

Overall, ISUAL data will be used for more technical publications as a unique demonstration for novel data analysis algorithms as well as validating the test and evaluating the performance of the optical system (This is still very optimistic.)

ROCSAT-2Current Status at NCKU

Optical Design and Testing Workshop (on mid-December at NCKU campus) :

Dr. Leo Gardner, Chairman of the Optical Design of the Optical Technology Division of OSA, is invited to talk about his experience on optical system design in the workshop: Design and Analysis Optical System

More information can be found in web site http://www.phys.ncku.edu.tw/optics

In the next February, another tutorial course on optical design analysis with ASAP will be offered at NCKU campus. The lecturer is an experienced engineer from BRO.

Optical Testing facilities Will be completed by the end of this year

ROCSAT-2Current Status at NCKU

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 Working on operational handbook

(mission operation management) Simulation environment (parallel computing has been built)

ROCSAT-2Current Status at NCKU

Science team Ground observation

Publications: Six papers are submitted for publication (expect two of them will be

accepted) Meeting and international conference in the near future:

Will attend this coming AGU meeting for paper presentation as well as the coordination meeting for the joint observation of the Sprites

Activity: Ground observations have been made; More ground observation activities have been scheduled

Simulation The simulation code is now under developing