ACIS Science Instrument Software Requirements Specification

36-01103 Rev. I

1.0 Introduction

The AXAF-I CCD Imaging Spectrometer (ACIS) Science Instrument Software is being developed by the Massachusetts Institute Technology, Center for Space Research (MIT-CSR) as part of the ACIS Digital Processor Assembly (DPA). The DPA resides on-board the Advanced X-ray Astrophysics Facility - Imaging (AXAF-I). The DPA Science Instrument Software is responsible for acquiring and processing image data from the ACIS CCD Imaging Spectrometer and transferring the processed data to the AXAF-I Command and Telemetry Unit (CTU), which is then responsible for sending the information to the ground.

1.1 Purpose

The ACIS Science Instrument Software Requirements Specification defines and describes the operations, interfaces, performance, and quality assurance requirements of the ACIS Science Instrument Software. The requirements described in this document are derived from the ACIS Contract End Item (CEI) Specification, and the AXAF-I to Science Instrument (SI) Interface Control Document (ICD).

1.2 Scope

This document applies to the ACIS DPA Science Instrument Software. It does not provide information for the Ground Support Software (GSS), which is maintained separately as part of the Electronic Ground Support Equipment (EGSE).

This document supplies information applicable to the SDM02 Software Requirements Specification and generally follows the format specified by IEEE 830-1993 Section A-5.

By mutual agreement, MSFC Software Management and Development Requirements Manual MM8075.1 which supersedes MA-001-006-2H, forms the basis for this plan.

1.3 References

TABLE 1. Reference Documents

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Part Number       Version           Title                                         
--------------------------------------------------------------------------------
MSFC MM 8075.1    January 22, 1991  MSFC Software Management and Develop          
                                    ment Requirements Manual                      
MIT-CSR 36-05001  September 22,     AXAF-I to Science Instrument Interface Con    
                  1995              trol Document (TRW IF1-20 CM07A)              
MIT-CSR 36-02104  C                 DPA Hardware Specification and System         
                                    Description                                   
MIT-CSR 36-02205  C                 DPA to DEA Interface Control Document         
MIT-CSR 36-01101  07                Contract End-Item Specification for the ACIS  
MIT-CSR 36-01201  Rev. 01           ACIS Program Management Plan                  
MIT-CSR 36-01206  Rev. 01           ACIS Configuration Management Plan            
NU920102          1991              Nucleus Real-Time Executive (RTX) system      
                                    from Accelerated Technology, Inc.             
NU910701          1991              Nucleus RTX Reference Manual from Accel       
                                    erated Technology, Inc.                       
NU910702          1991              Nucleus RTX Internals Manual from Acceler     
                                    ated Technology, Inc.                         
IEEE 830          1993              IEEE Guide to Software Requirements Speci     
                                    fications                                     
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