Download Alice - PDS Small Bodies Node

TABLE OF CONTENTS
DOCUMENTATION CHANGE RECORD...............................................................................................................v
LIST OF ACRONYMS AND ABBREVIATIONS ................................................................................................. vii
1
GENERAL DESCRIPTION ................................................................................................................................9
1.1
1.2
1.3
2
ALICE TEAM ....................................................................................................................................................9
SCIENTIFIC OBJECTIVES (ALICE EID-B, § 1.1.1) .............................................................................................9
EXPERIMENT OVERVIEW ...............................................................................................................................10
EXPERIMENT CONFIGURATION ...............................................................................................................13
2.1
PHYSICAL ......................................................................................................................................................13
2.2
ELECTRICAL ..................................................................................................................................................13
2.2.1
Power Interface Circuits (Alice EID-B, § 2.4) .....................................................................................13
2.2.2
Pyrotechnic Interface Circuits (Alice EID-B, § 2.5).............................................................................15
2.2.3
OBDH Interface Circuits (Alice EID-B, § 2.7).....................................................................................16
2.2.4
Instrument Heaters................................................................................................................................18
2.2.5
Instrument Thermistors/Housekeeping Sensors....................................................................................18
2.3
SOFTWARE (DRD 28.1) .................................................................................................................................18
2.3.1
Software Overview ................................................................................................................................18
2.3.2
Autonomy Concept ................................................................................................................................19
2.3.3
Software Maintenance Approach..........................................................................................................20
2.3.4
Data Delivery Concept: Application Process IDs (APIDs)..................................................................22
2.3.5
Timing Requirements ............................................................................................................................22
2.3.6
Boot Sequence.......................................................................................................................................24
2.3.7
Instrument Operating Modes ................................................................................................................25
2.4
BUDGETS (DRD 12.2)....................................................................................................................................28
2.4.1
Mass ......................................................................................................................................................28
2.4.2
Operating Power (Alice EID-B, § 2.4.3) ..............................................................................................28
2.4.3
Data Rates (Housekeeping and Science) ..............................................................................................28
2.4.4
Non Operating Heaters (Alice EID-B, § 2.3.3.2) .................................................................................33
2.4.5
S/C Powered Thermistors (Alice EID-B, § 2.3.3.4)..............................................................................33
2.4.6
Pyro Lines (Alice EID-B, § 2.5)............................................................................................................33
2.4.7
OBDH Channels (Alice EID-B, § 2.7.5) ...............................................................................................33
2.5
FLIGHT DATA ARCHIVE PLAN/DISTRIBUTION PLAN......................................................................................33
3
EXPERIMENT OPERATIONS ........................................................................................................................34
3.1
OPERATING PRINCIPLES.................................................................................................................................34
3.1.1
Instrument Overview.............................................................................................................................34
3.1.2
Optical Design ......................................................................................................................................34
3.1.3
Entrance Slit Design .............................................................................................................................36
3.1.4
Detector and Detector Electronics .......................................................................................................36
3.1.5
Electrical Design ..................................................................................................................................38
3.1.6
Data Collection Modes .........................................................................................................................39
3.1.7
Detector Acquisition Durations ............................................................................................................40
3.1.8
Analog versus Digital Detector Count Rates and Rate Doubling ........................................................41
3.1.9
Code Memory Management..................................................................................................................42
3.1.10
Software Code Patch Operation ...........................................................................................................42
3.1.11
In-Flight Aperture Door Performance Tests ........................................................................................43
3.1.12
Fail-Safe Door Activation.....................................................................................................................44
3.2
OPERATING MODES .......................................................................................................................................44
3.2.1
Ground Test Plan (from Alice EID-B, § 5) ...........................................................................................44
3.2.2
In-orbit Commissioning Plan................................................................................................................45
3.2.3
Instrument Checkout and In-Flight Calibration ...................................................................................48
3.2.4
Flight Operations Plans per Mission Phase.........................................................................................49
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