Document Number:	Release Date:
	LAT-PS-04631-01	Sep 27,2004
	Authors: Eduardo do Couto e Silva, Lee Steele
GLAST LAT
	Subsystem/Office:
	Integration and Test
Document Title:
GLAST LAT Instrument Data Analysis Primer

Gamma Ray Large Area Space Telescope (GLAST)

Large Area Telescope (LAT)

Integration & Test (I&T)

Instrument Data Analysis Primer

Change History Log

Revision

Effective Date

Description of Changes

Contents

1. Introduction. 9

1.1. Hardware Overview. 9

1.2. Overview of Data Taking During LAT Integration. 11

2. Geometry and Numbering Scheme. 12

2.1. ACD Geometry and Numbering Scheme. 12

2.2. TKR Geometry and Numbering Scheme. 12

2.2.1. CAL Geometry and Numbering Scheme. 15

3. Readout Sequence. 17

3.1. ACD Readout Sequence. 17

3.1.1. Mapping across ACD Physical and Electronic Space. 17

3.2. TKR Readout Sequence. 17

3.2.1. Mapping across TKR Physical and Electronic Space. 17

3.3. CAL Readout Sequence. 20

3.3.1. Mapping across CAL Physical and Electronic Space. 21

4. Global Trigger and Dead Time. 22

4.1. Time Delays. 22

4.2. Dead Time. 24

5. Nominal Register Settings. 25

5.1. ACD Nominal Register Settings. 25

5.1.1. ACD Veto (hit) Threshold Discriminator 25

5.1.2. ACD Zero-Suppression Threshold. 25

5.1.3. ACD Time Delays. 25