Cost Estimates

Basic 8.4-m telescope                                           $50M
includes primary and secondary, mirror cells, 
telescope structure, control system, dome, building
[Basis -- guesswork; estimates for Gemini, Magellan,
LBT, the 3DT]

2. 1.1-m corrector                                               $4M
includes ADC, cells, control system
[Basis -- CTIO corrector (0.49-m), increased by 
diameter cubed]

3. Spectrographs - 4 required @ $4M each                        $16M
includes collimator, camera, 3 grating sets
[Basis -- assumes the smaller 4-m spectrograph will cost 
$3M plus detectors]

4. Detectors, optical - 4 Mosaics required @ $3M each           $12M
includes per Mosaic, 32 CCDs (2Kx4K), 8 controllers,
dewar, window
[Basis -- The 2 NOAO Mosaic CCD Imagers]

5. Detectors, IR - 4 Mosaics at $4M each                        $20M
includes per channel, 16 2Kx2K, plus controllers, 
[Basis -- current pricing at $250K per 2Kx2K array]

6. Instrument Computers, 8 required for data acq. @ $10K         $1M
each, includes storage for DVD array or other archive medium
Expected data rate is <50 Gbytes per night (1 DLT tape).
[Basis -- existing Mosaic computers, and continuing decline of
computer hardware costs.]

7.  Software                                                     $6M
includes acquisition, pipeline reductions, and archiving.
Much of the software, including database and mining tools, 
will build on the legacy from the SDSS and the STScI archive. 
Further, we expect that external and diverse sources of 
funding and contributed software will be available to develop 
the "expert" software for higher level analyses 
(e.g., classification and statistics)
[Basis -- other large software projects at NOAO; e.g., IRAF over
its 15 year lifetime has cost ~$5M in 1999 dollars]

Total                                                          $109M