CASSINI In Space

 

Helix Nebula Banner Image
GALILEO

The Galileo Energetic Particles Detector

 

Galileo EPD Handbook

 

Chapter 1. Instrument Summary

 

Accumulator Servicing Tables

 

The following tables show the order in which the EPD data system reads the CMS rate accumulators in both the present design and the proposed new design. The three existing tables, L, J, and J', will be replaced by two tables, L and C. The L table is the same for both designs, and will therefore not be uploaded via RAM patch in the new design. The new C table (for "CMS" table) will be identical to the present L table, except for the locations indicated in bold.  Note that if the new C table could not be loaded for some reason, we could still read all the CMS rates except for TAC counts and TH1.

 

The tables are actually a map of the RAM locations where the accumulator servicing is performed. Each accumulator is identified by a one byte code, followed by three bytes for the accumulator count data. The channel name appears next to the four byte group for easier identification. The table is read starting at the upper left position and going down each column; the HEX value C1 appears at the end of each table as a stop flag for the data system DMA controller.

 

TABLE 13a. Accumulator Servicing Tables - Old L Format

 

4F   1C   54   43   02  
XX LS XX CS XX CA1 XX CP3 XX A4
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
44   0E   46   4D   12  
XX JAS XX EB1 XX CA3 XX CH0 XX A5
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4E   1E   56   5D   01  
XX JCS XX EB2 XX CA4 XX CH1 XX A2
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
5F   1F   5A   40   19  
XX KS XX FB2 XX CM1 XX CE2 XX E2
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
5E   0C   07   51   09  
XX JBS XX AS XX DC3 XX CE3 XX E3
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
0F   48   14   50   0A  
XX FB1 XX CH2 XX B0 XX CE1 XX F0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4A   58   15   42   18  
XX CM0 XX CH3 XX B1 XX CP1 XX E0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4B   49   05   03   08  
XX CM2 XX CH4 XX B2 XX A6 XX E1
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
47   59   04   13   00  
XX CNO XX CH5 XX A8 XX A7 XX A0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
1D   5B   16   0B   10  
XX DS XX CM3 XX DC0 XX F2 XX A1
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
45   4C   06   1B   C1  
XX CA0 XX CM4 XX DC1 XX F3    
XX   XX   XX   XX      
XX   XX   XX   XX      
55   5C   17   1A      
XX CA2 XX CM5 XX DC2 XX F1    
XX   XX   XX   XX      
XX   XX   XX   XX      
0D   57   52   11      
XX BS XX CN1 XX CP2 XX A3    
XX   XX   XX   XX      
XX   XX   XX   XX      

 

TABLE 13b. Accumulator Servicing Tables - Old J' Format

 

4F   1C   54   43   02  
XX L'S XX JA'S XX CA1 XX CP3 XX A4
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
44   0E   46   4D   12  
XX CS XX K'S XX CA3 XX CH0 XX A5
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4E   1E   56   5D   01  
XX DS XX EB2 XX CA4 XX CH1 XX A2
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
5F   1F   5A   40   19  
XX EB1 XX FB1 XX CM1 XX CE2 XX E2
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
5E   0C   07   51   09  
XX JB'S XX AS XX DC3 XX CE3 XX E3
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
0F   48   14   50   0A  
XX FB2 XX CH2 XX B0 XX CE1 XX F0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4A   58   15   42   18  
XX CM0 XX CH3 XX B1 XX CP1 XX E0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4B   49   05   03   08  
XX CM2 XX CH4 XX B2 XX A6 XX E1
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
47   59   04   13   00  
XX CNO XX CH5 XX A8 XX A7 XX A0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
1D   5B   16   0B   10  
XX JC'S XX CM3 XX DC0 XX F2 XX A1
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
45   4C   06   1B   C1  
XX CA0 XX CM4 XX DC1 XX F3    
XX   XX   XX   XX      
XX   XX   XX   XX      
55   5C   17   1A      
XX CA2 XX CM5 XX DC2 XX F1    
XX   XX   XX   XX      
XX   XX   XX   XX      
0D   57   52   11      
XX BS XX CN1 XX CP2 XX A3    
XX   XX   XX   XX      
XX   XX   XX   XX      

 

TABLE 13c. Accumulator Servicing Tables - New C Format

 

4F   1C   54   43   02  
XX BS XX JA'S XX CA1 XX TS1 XX A4
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
44   0E   46   4D   12  
XX CS XX K'S XX CA3 XX TA2 XX A5
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4E   1E   56   5D   01  
XX DS XX JB'S XX CA4 XX CH1 XX A2
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
5F   1F   5A   40   19  
XX EB1 XX FB1 XX CM1 XX CE2 XX E2
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
5E   0C   07   51   09  
XX EB2 XX TAC XX DC3 XX TP2 XX E3
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
0F   48   14   50   0A  
XX FB2 XX TO3 XX B0 XX TP3 XX F0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4A   58   15   42   18  
XX TO2 XX CH3 XX B1 XX TS2 XX E0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
4B   49   05   03   08  
XX TO1 XX CH4 XX B2 XX A6 XX E1
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
47   41   04   13   00  
XX CNO XX TH1 XX A8 XX A7 XX A0
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
1D   5B   16   0B   10  
XX KT'S XX CM3 XX DC0 XX F2 XX A1
XX   XX   XX   XX   XX  
XX   XX   XX   XX   XX  
45   4C   06   1B   C1  
XX TO4 XX CM4 XX DC1 XX F3    
XX   XX   XX   XX      
XX   XX   XX   XX      
55   5C   17   1A      
XX TA1 XX CM5 XX DC2 XX F1    
XX   XX   XX   XX      
XX   XX   XX   XX      
0D   57   52   11      
XX STARTS XX CN1 XX TP1 XX A3    
XX   XX   XX   XX      
XX   XX   XX   XX      

 

 

Next: Pre-Challenger CMS Overview

 

Return to the CMS Subsystem Index

Return to Galileo EPD Handbook Table of Contents Page.

Return to main Galileo Table of Contents Page.
Return to Fundamental Technologies Home Page.

 

Updated 8/23/19, Cameron Crane

QUICK FACTS

Manufacturer: The Galileo Spacecraft was manufactured by the Jet Propulsion Laboratory, Messerschmitt-Bölkow-Blohm, General Electric, and the Hughes Aircraft Company.

Mission Duration: Galileo was planned to have a mission duration of around 8 years, but was kept in operation for 13 years, 11 months, and 3 days, until it was destroyed in a controlled impact with Jupiter on September 21, 2003.

Destination: Galileo's destination was Jupiter and its moons, which it orbitted for 7 years, 9 months, and 13 days.