TMT Construction Proposal - Thirty Meter Telescope

6.1.5.2 Pointing on the Sky.......................................................................................................40
6.1.5.3 Guiding and Field De-Rotation .....................................................................................40
6.1.5.4 Offsetting and Nodding.................................................................................................40
6.1.5.5 Image Quality................................................................................................................40
6.1.5.6 Optical Throughput and Telescope Emissivity .............................................................41
6.1.5.7 Other Optical Requirements .........................................................................................41
6.1.5.8 Laser Guide Stars and Laser Guide Star Wavefront Sensing......................................42
6.1.6 General Instrumentation Requirements ................................................................................42
6.1.6.1 Instrument Reconfiguration and Availability .................................................................42
6.1.6.2 Nasmyth Platform Requirements..................................................................................42
6.1.7 Early light Instrument Requirements .....................................................................................42
6.1.7.1 Early light Instrument Suite...........................................................................................42
6.1.7.2 NFIRAOS Requirements ..............................................................................................42
6.1.7.3 IRIS Requirements .......................................................................................................42
6.1.7.4 IRMS Requirements .....................................................................................................43
6.1.7.5 WFOS Requirements....................................................................................................43
6.1.8 First Decade Instrumentation Requirements.........................................................................43
6.1.9 Summit Facility Requirements...............................................................................................44
6.1.9.1 Enclosure, Fixed Enclosure Base and Telescope Pier ................................................44
6.1.9.2 Mirror Maintenance.......................................................................................................45
6.1.9.3 Operations Spaces .......................................................................................................45
6.1.9.4 Lab and Shop Spaces ..................................................................................................45
6.1.9.5 Personnel spaces .........................................................................................................45
6.1.9.6 Shipping and Receiving................................................................................................45
6.1.9.7 Mechanical and Electrical Plant....................................................................................45
6.1.9.8 Roads and Parking .......................................................................................................46
6.1.10 Support Facility Requirements ..............................................................................................46
6.1.11 Construction Camp................................................................................................................46
6.1.12 TMT Headquarters Offices, Science Center, and Data Archive ...........................................46
6.1.13 Maintenance and Reliability ..................................................................................................47
6.1.14 Environmental, Health and Safety Requirements .................................................................47
6.2 Requirements Flow Down and Traceability ...............................................................................48
6.2.1 Flow Down Strategy ..............................................................................................................48
6.2.1.1 Documentation Tree .....................................................................................................48
6.2.1.2 Traceability ...................................................................................................................49
6.2.2 Status of TMT Requirements ................................................................................................49
6.3 Observatory Requirements Documentation ..............................................................................49
6.3.1 Introduction............................................................................................................................49
6.3.2 Level 1 Requirements Documents and Structure .................................................................49
7 System Design and Performance.............................................................................................. 51
7.1 System Design Philosophy........................................................................................................51
7.1.1 Design philosophy .................................................................................................................51
7.1.2 Major design choices.............................................................................................................51
7.2 Observatory Layout ...................................................................................................................53
7.2.1 Optical design........................................................................................................................53
7.2.2 Telescope layout ...................................................................................................................54
7.2.3 Nasmyth platform ..................................................................................................................55
7.2.4 Enclosure...............................................................................................................................56
7.2.5 Cranes and personnel access...............................................................................................56
7.2.6 Facilities.................................................................................................................................58
7.3 Observatory Behavior ................................................................................................................58
7.3.1 Control architecture ...............................................................................................................59
7.3.2 Software architecture ............................................................................................................62
7.3.3 Acquisition .............................................................................................................................63
7.4 Optical Error Budgets ................................................................................................................63
7.4.1 Overview................................................................................................................................63
TMT Construction Proposal
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