STATUS REPORT FOR MAY JULY Spartan IR Camera for the SOAR Telescope. Edwin D. Loh

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1 STATUS REPORT FOR MAY JULY 2003 Spartan IR Camera for the SOAR Telescope Edwin D. Loh Department of Physics & Astronomy Michigan State University, East Lansing, MI ext August 2003 During this reporting period, we (1) finished the metrology of the cryo-optical box, (2) began the cold test of the cryo-optical box, and (3) resumed work on the software. We have completed 80% of the milestones of the project. We have scaled back the instrument to have only J, H, and K filters. The budget is $57 k under the baseline: $44k for filters has been removed, but costs increased by $22 k since 30 April. Delivery of the instrument is delayed for 8 months until February mm D Figure 1 Left: The cryo-optical box suspended above the bathtub of the vacuum enclosure in the semi-clean foyer of the clean room. Center: First cool-down of the instrument without optics. Right: Errors, magnified by 10,000, of the locating pins on the top plate of the cryo-optical box.

2 2 Figure 2 Optical schematic. The red ray is the principal ray for the high-resolution, f/21 channel; the cyan ray, the wide-field, f/12 channel. 1 Project Status 1.1 Summary Problems with the mirrors, now expected in early October and 17 months late, will delay completion of the instrument to the end of February Axsys uses a computergenerated hologram (CGH) to produce a beam that is a spherical wave upon reflection off of the aspheric mirror (Figure 3). In addition the CGH produces two separate Figure 3 The computer-generated hologram (CGH) converts a plane wave entering from the interferometer at the left to a spherical wave if the mirror shape is correct. Picture is from Diffraction International, Minnetonka, MN,

3 3 beams to align itself to the interferometer and to the master plate, which holds the mirror. Axsys has had problems locating the beam that aligns the master plate. After attempting a mechanical alignment procedure for 8 months and failing, they have finally located the missing alignment beam. With metrology secured, they expect to polish one mirror a week. The Advanced Technologies and Instrumentation Program of the NSF funded the Widefield Upgrade for the Spartan IR Camera, for the installation of the third and fourth detectors. The Fundacao de Apoio a Universidade de São Paulo (FUSP) funded the third detector with a grant to Beatriz Barbuy of the Instituto de Astronomia, Geofisica e Ciências Atmosféricas (IAG) da Universidade de São Paulo. The Fundacao de Amparo a Pesquisa do Estado de São Paulo (FAPESP) funded the fourth detector with a grant to Sueli Viegas of the IAG. These detectors will be added approximately a year after commissioning. We have scaled back the project by eliminating the narrow-band filters; they can be added after delivery of the instrument if funds become available. The labor resources are tight. If any additional open-ended problems arise, additional resources will be needed. See 1.4. The project summary is in Table 1, and earned value analysis, percent complete, and work summaries by WBS are in Table 2. Changes since 30 April 2003, the date covered in the last report, are also in Table 2. More details are in Tables 3 4.

4 4 Table 1 Project Summary Status date 7/31/2003 Dates Start: Tue 9/4/01 Finish: 2/20/2004 Baseline Start: Mon 9/3/01 Baseline Finish: Tue 6/10/03 Actual Start: Tue 9/4/01 Actual Finish: NA Start Variance: 0 d Finish Variance: 183d Duration Scheduled: 644 d Remaining: 112 d Baseline: 461 d Actual: 532 d Variance: 183 d Percent Complete: 83% Work Scheduled: 16,550 h Remaining: 1,947 h Baseline: 8,733 h Actual: 14,603 h Variance: 7,817 h Percent Complete: 88% Costs Scheduled: $1,073,549 Remaining: $53,399 Baseline: $1,131,372 Actual: $1,0,150 Variance: ($57,823) Task Status Resource Status Tasks not yet started: 129 Work Resources: 0 Tasks in progress: 56 Overallocated Work Resources: 7 Tasks completed: 519 Material Resources: 0 Total Tasks: 704 Total Resources: Earned-value Analysis The schedule variance (SV) worsened by $12k since the last report 1. The schedule variance is due to delays in the fabrication of the mirrors (WBS and ) by Axsys Technologies and delayed installation of the instrument (WBS 1.7.5). The schedule variance in procurements is not real: inexplicably, some completed tasks show a schedule variance. The variance at completion (VAC) improved by $24k since the last report, primarily for three reasons. (1) We removed the narrow-band filters. (2) The bills for work by mechanical fabrication by vendors and for materials, which were paid in this reporting period, had not been entered accurately in the project file. (3) We damaged two rotation stages by allowing moisture to condense on the bearings; repair is costly. 1 Earned value analysis does not apply here to work charged under Fixed Costs, WBS 1.1.7, (Biel, Chen, Davis, Laporte, Lien, and Loh); therefore it cannot show problems in work done by them. It can show problems with purchased parts and labor that is charged by the hour.

5 5 Table 2 Earned value analysis, % complete, and work. A positive schedule variance, SV, indicates the project is ahead of schedule. A positive cost variance, CV, or variance at completion, VAC, indicate the project is less costly than budgeted. WBS Task BCWP[$] SV [$] CV [$] EAC [$] BAC [$] VAC [$] %WC %C W [hr] RW[hr] 1 Spartan IR Camera 1,065,1 (66,352) 44,871 1,073,549 1,131,372 57,824 88% 83% 16,550 1, Project Management 156,619 (5,000) 2, , ,619 (14,939) 96% 97% 1, System Engineering (1,996) 2, (2,056) 100% 100% 1, Mechanical 338,979 (29,081) 43, , ,060 63,370 94% 85% 8, Electronics 10,105 (2,600) ,426 12,705 2,279 89% 88% 2, Software 10,000 (800) 3,860 7,722 10,800 3,078 89% 54% 1, Integration 2,200 (1,600) 2,018 2,445 3,800 1,355 36% 40% 1, Deliverables 2,600 (18,200) ,956 20,800 5,844 46% 50% Procurement 111,417 (9,131) (6,000) 121, ,548 (801) 98% 99% Preplan Spending 432,321 0 (307) 432, ,321 (307) 100% 100% 0 0 Change from 04/30/03 1 Spartan IR Camera 17,924 (11,804) (21,829) (24,168) 0 24,168 6% 1% 1,536 (755) 1.1 Project Management 6,364 (6,364) (5,513) (1,932) 0 1,932 5% 0% 182 (60) 1.2 System Engineering % 1% 47 (11) 1.3 Mechanical 8,560 8,560 (15,824) (22,044) 0 22,044 7% 4% 929 (426) 1.4 Electronics 0 0 (520) (726) % 1% 303 (107) 1.5 Software 0 0 (1,140) (418) % -32% 8 (70) 1.6 Integration (672) 2% 1% (52) (55) 1.7 Deliverables 1,000 (16,000) (552) % 22% 33 (82) 1.8 Procurement 2,000 2,000 1, (280) 0% 0% Preplan Spending % 0% 0 0 BCWS Budgeted cost of work scheduled BAC Budget at completion BCWP Budgeted cost of work performed VAC Variance at completion; VAC=BAC-EAC ACWP Actual cost of work performed %WC Work completed SV Schedule variance; SV=BCWP-BCWS %C Percent completed; (duration of the task) / (total duration) CV Cost variance; CV=BCWP-ACWP W Work EAC Estimate at completion RW Remaining work

6 6 Table 3 Details on earned value, % completion, and work for WBS The change since 30 April 2003 is in the last three columns. WBS Task EAC [$] BAC [$] VAC [$] %WC %C W[hr] RW[hr]dW drw dvac 1.1 Project Management 176, ,619 (14,939) 96% 97% 1, (60) 1, Schedule & Budget 5,728 6, % 98% (2) Weekly Meetings % 84% (7) Reviews % 0% (38) (38) Monthly & Quarterly Reports % 94% (17) Manage % 100% Consultants 0 10,000 10, % 100% Fixed Cost 167, ,008 (27,685) 100% 96% (0) 1, Travel 1,000 5,000 4,000 0% 67% Move Laboratory (136) 100% 100% Training (645) 100% 100% Hire Engineer/Designer 1,356 0 (1,356) 100% 100% Maintain Laboratory % 100% System Engineering 2, (2,056) 100% 100% 1, (11) Optics % 100% Analysis % 100% Plans % 100% Requirements/ICDs/Review D (192) 100% 100% (3) Software Requirements % 100% Master Layout 2, (1,864) 100% 100% Mechanical 304, ,060 63,370 94% 85% 8, (426) 22, Cryo-Optical Box 31,514 41,188 9,674 98% 97% 2, (78) (5,107) Thermal Reflector 3,518 3, % 100% (108) Vacuum Enclosure 17,373 27,380 10, % 100% (1,721) Filter Wheel 6,607 12,400 5,793 81% 91% (43) Rotational Stage 52,496 44,450 (8,046) 97% 89% (10,000) Mirrors & Mounts 96,188 98,575 2,387 90% 56% (1,206) Mirrors 81,435 95,975 14,540 88% 13% Mounts for Mechanisms 8,113 1,800 (6,313) 100% 100% (624) Mounts for Mirrors 6, (5,839) 83% 93% (582) Filters 6,650 51,000 44, % 100% , Upgrades 82,714 84,186 1,472 93% 75% 1, (94) (813) nd Channel Mirrors & Moun 78,816 80,055 1,239 86% 68% (24) (258) Mask Wheel Upgrade 1,468 4,131 2,663 63% 84% (9) (26) Eyed Focal Plane Assembly 2,430 0 (2,430) 100% 100% (39) (1,035) Eyed Focal Plane Mechanis % 100% (8) (7) Metrology & Acceptance Test 2,743 0 (2,743) 96% 97% (77) (1,511) Fixtures 4,887 0 (4,887) 81% 85% (161) (1,623) 1.4 Electronics 10,426 12,705 2,279 89% 88% 2, (107) Detector Assembly 4,200 6,920 2,720 86% 85% 1, (109) Electronic Hardware 6,226 5,785 (441) 100% 100% Software 7,722 10,800 3,078 89% 54% 1, (70) Select Vendor for Software % 100% Write Minimal Software 5,000 10,000 5, % 100% Write Baseline Software 1,140 0 (1,140) 100% 100% (13) (92) Write Operating Software 1,582 0 (1,582) 8% 1% (3)

7 7 Table 4 Details on earned value, % completion, and work for WBS The change since 30 April 2003 is in the last three columns. WBS Task EAC [$] BAC [$] VAC [$] %WC %C W[hr] RW[hr] dw drw dvac 1.6 Integration 2,445 3,800 1,355 36% 40% 1, (52) (55) (672) Telescope Simulator 1,773 3,800 2,7 78% 77% (2) Integration (672) 0% 0% (52) (52) (672) Install optics (160) 0% 0% (20) (20) (160) Optical Alignment (512) 0% 0% (512) Flexure Test % 0% Cold Tests % 0% (32) (32) Acceptance Tests % 0% Project Complete % 0% Deliverables 14,956 20,800 5,844 46% 50% (82) Manuals % 59% (39) Acceptance Test % 0% Pack & Ship 4,476 4, % 51% (45) Documentation 480 1, % 48% (1) Installation 10,000 15,000 5,000 0% 0% Procurement 121, ,548 (801) 98% 99% (280) Procure Computers for Labora 2,552 2,400 (152) 100% 100% Procure Solidworks License 4,643 1,645 (2,998) 100% 100% Procure Dust-free Hood 0 3,000 3, % 100% Procure Parts for Test Dewar 0 2,000 2, % 100% Procure Field-flattening Lens 6,280 2,000 (4,280) 100% 100% (280) Procure Vacuum Bulkhead 2,605 4,300 1, % 100% Procure 4 Additional Rotation 61,968 67,040 5, % 100% Procure Parts for Vacuum Enc 7,949 7,163 (786) 100% 100% Procure Parts for Telescope Si % 100% Procure Window 6,617 8,000 1, % 100% Procure Coordinate Measuring 23,212 22,500 (712) 100% 100% Procure Mask % 67% Misc Supplies 3,932 5,000 1,068 0% 0% Procure Instrument Computer 1,091 0 (1,091) 100% 100% Preplan Spending 432, ,321 (307) 100% 100% Schedule The remaining tasks are to finish fabrication and to test the mechanical parts (WBS 1.3), to accept delivery of the mirrors (WBS & ), testing the electronics (WBS 1.4.1), finish the software (WBS 1.5) and integration (WBS 1.6). The Gantt chart (Figure 4.) shows the tasks on the critical path, which contains Mirrors and Integration. The critical path means this: delay in any of these tasks causes a delay in the completion of the project. Installation of the optics is scheduled to start in late October 11.

8 Figure 4 Gantt chart of incomplete summary tasks and incomplete tasks on the critical path. The text to the right of the bar line is the percent of the work completed for summary tasks and the completion date for other tasks. 8

9 9 1.4 Work Summary From 1 May to 31 July, we worked 2,254 hours and the remaining work decreased by 681 hours. The work efficiency, defined to be the ratio of the change in the remaining work to the change in the actual work, is 30%, which is about the same as that of the last reporting period. The project will need more resources in all likelihood. If all of the labor is expended at the end of the project, then the work efficiency must rise to 70% during the remaining time. Such high efficiency is not possible if problems arise as they have done in the past. There are several key milestones where time-consuming problems may arise. (1) Milestone 88: Detector Tested in Lab, (2) Milestone 111: Cryo-Optical Box Thermal Test Finished, (3) Milestone 132: Instrument Assembled & Aligned at Room Temperature, (4) Milestone 133: Flexure Tested, (5) Milestone 136: Cold Test #1 [of Entire Instrument] Finished. The other milestones, which involve fabrication, writing documentation, and writing software, are not expected to cause open-ended problems. Hours Actual Remaining Variance Jul-01 Feb- Sep- Mar-03 Oct-03 Date dremaining / dactual 120% 100% 80% 60% 40% 20% 0% Jul-01-20% Feb- Sep- Mar-03 Oct-03-40% -60% Date Figure 5 Work summary (top) and work efficiency (bottom). "Actual" is the number of hours expended. "Remaining" is the estimated hours to complete the project. Variance = Actual + Remaining Baseline. 1.5 Milestones The time-phased completion of the milestones is in Figure 6, and a complete list of milestones is in the Appendix. We have finished 80% of the 147 milestones.

10 10 Figure 6 Cumulative number of milestones completed (blue) and not completed (magenta) vs. date. 160 Milestones S O N D- 01 J- F M A- M- J- J A S- O- N- D- J- 03 F- 03 M- 03 A- 03 M- 03 J- 03 J- 03 A- 03 S Personnel Jianjun Chen finished his master s project, Control Software for the Motors, Spartan IR Camera, in May, and left the project. Nate Verhanovtiz, a graduate student in mechanical engineering, joined the project in May. His responsibility is software. 2 Task Details Refer to Table Project Management (WBS 1.1) The cost of labor for the extension in the schedule is included. 2.2 System Engineering (WBS 1.2) There is nothing to report.

11 11 Table 5 Cost and work by WBS WBS Task Work [hr] Cost [$] dwork May03 EAC Variance Remainin EAC VAC RemainingdEAC dremainin 1 Spartan IR Camera 16,678 7,945 2,095 1,073,901 57,472 53, Project Management 1, ,558 (14,939) 22, System Engineering 1, ,776 (2,056) Mechanical 8,233 4, ,2 62,858 9, Cryo-Optical Box 2, ,514 9, MLI Blanket 60 (11) 0 2,533 1, CryoBox 1, ,822 (1,942) Mask Plate , A-Frame 52 (220) , N2 Can 225 (196) 0 4,654 5, Thermal Reflector , Vacuum Enclosure ,373 10, Filter Wheel ,607 5,793 2, Rotational Stage ,496 (8,046) 5, Mirrors & Mounts ,188 2, Mirrors ,435 14, Mounts for Mechanisms ,113 (6,313) Mounts for Mirrors ,639 (5,839) Filters ,650 44, Upgrades 1, ,842 1, nd Channel Mirrors & Mounts [Upg 589 (179) 94 78,944 1, Mask Wheel Upgrade 134 (121) 60 1,468 2, Eyed Focal Plane Assembly ,430 (2,430) Eyed Focal Plane Mechanism Metrology & Acceptance Tests ,839 (2,839) Fixtures ,175 (5,175) 1, Electronics 2,347 1, ,426 2, Software 1,120 1, ,722 3,078 1, Integration 1,097 (161) 721 2,285 1,515 2, Deliverables ,956 5,844 13, Procurement ,349 (801) 3, Preplan Spending ,628 (307) Mechanical Cryogenic Optical Box (WBS ) The two major tasks are measuring the cryo-optial box (COB) and the thermal test Measure Cryo-Optical Box (WBS ) Since the cryo-optical box (COB) supports the optics, the positions of the locating pins and the locating pads must be accurate to 0.1 mm at the tightest, and the relative locations of pairs of pins that locate mirrors must be accurate to 0.01 mm. The accuracy is beyond the capability of machining and requires metrology and shims. See the shim assembly for the filter wheels and fold mirrors (Figure 11). Here we report the metrology of the two large plates, called the top and bottom, to which the optics mount. Directions are defined in Figure 7.

12 12 Figure 7 The cryo-optical box. The edges of the walls define the vertical position of the optics; the plates conform to the walls. The measurement of the bottom edge of the walls deviates by up to 0.12 mm 800 back back inside wall from a plane. See figure 8. The deviation is mainly a twist: the right side of the back wall is down by 0.12 mm and the 600 left side is up by 0.08 mm. 400 inside wall The errors of the locating pins are quite small and well within the range of adjustment of the shim plates. The errors left and right halves are different (Figure 9). Apparently, the machining occurred on two days, and the temperature was 2.2 C cooler when the right half was machined. We have devised a procedure for assembling the COB reproducibly. With the bolts snug but not tight, we measure front front F R Figure 8 Deviation, magnified by 2000, of the bottom edge of the walls from a plane. The right edge of the back wall is low (shifted away from the top) by 0.12 mm.

13 13 and adjust the twist. Then we tighten the bolts. The twist, 0.3 mrad/m, is reproducible to 0.03 mrad/m, which translates to a maximum error of 0. mm in height Cl 12Cl' 12Cm 12Cm' Cl 12Cl' 12Cm 12Cm' refa 21Cm 21 refa 21Cm Cl 21Cl' Cl 21Cl' 600 ff refc 600 ff refc 400 af 400 af 200 m m' refb ff' da' da 200 m m' refb ff' da' da Figure 9 Errors (magnified by 10,000) of the pin holes in the top (left panel) and bottom (right panel) plates. Points with errors less than 0.005mm are shown as dots. The points are shifted so that refa has zero error and rotated so that refb has minimal error. The largest errors are 0.041mm [1.6mil] and 0.047mm [1.9mil] for the top and bottom respectively. The labels are m for mask, ff for filter-fold mirror assembly, 21Cl and 12Cl for f/21 and f/12 collimators, 12Cl and 21Cm for f/12 and f/21 collimators, da for detector assembly, and refa, refb, and refc for reference holes Cryo-Optical Box Thermal Test (WBS ) The thermal and vacuum design, though tested with a small dewar, is theoretical; now we test the design for the first time. With the COB in the vacuum enclosure and cooled, the questions are Is the pressure low enough (0.03 mtorr) that heat loss by molecular conduction is lower than that by radiation? Does a test load, here a cradle for a rotation stage, cool at the same rate are the COB? If so, the thermal conductance of the bolted joints is sufficiently high. What is the cooling time of the COB? What is the heat load? This is measured by the rate of nitrogen boil-off.

14 14 We have assembled the COB in the vacuum enclosure (Figure 10). The results of the first run are The e-fold time for cooling a dummy load is 3.4 hr. To cool within 1K of equilibrium requires 17 hr. The heat load is a factor of 3 higher than expected, primarily because the gas pressure, 0.1 mtorr, is too high. We plan to determine the composition of the residual gas in order to reduce the pressure. Figure 10 The cryo-optical box, which is wrapped in the aluminized mylar blanket, is suspended over the bathtub of the vacuum enclosure in the foyer of the clean room Eyed Focal-Plane Assembly (WBS ) The 2-eyed focal-plane assembly, which holds two detectors, is done. See Figure Fixtures (WBS ) The Lifting Jig for the COB (WBS ) is finished. It is in use in Figure 10. The Test Stand for Flexure Test (WBS ) is being fabricated. The Nitrogen Fill & Flush System (WBS ) has been designed.

15 15 Pin Figure 11 Left: Filter-fold assembly for the two filter wheels and their rotation stages and the two fold mirrors. Note the hole for one of two pins that locate the assembly accurately in the cryo-optical box. Right: 2-eyed focal-plane assembly without the detector cards and detectors.

16 16 The Clean Area for Assembly (WBS ), which consists of a clean bench, a clean room, and a clean hood for the coordinate-measuring machine, is finished. The clean room is in use in Figure 10. The racks for the computer, motor controller, and electronics (WBS ) are being designed. 2.4 Electronics (WBS 1.4) MUX Test at Cold Temperature (WBS ) We discovered a problem with the test of the multiplerer. (A multiplexer is a detector without the HgCdTe sensing layer.) The multiplexer does not accumulate more photoelectrons with a longer exposure time, even though it can produce an image. 2 Since Rockwell has not tried it, we have abandoned this test Cold Lab Test of Engineering-grade Detector (WBS ) We have installed the engineering-grade detector. Testing is in progress. 2.5 Software (WBS 1.5) We have reorganized the software tasks. The engineering software (WBS 1.5.3) is used during testing, and the operating software is used for observing. The engineering software has all of the functions for operating the instrument and many diagnostics. It does not have links to the telescope control system or to the data control system. The operating software (WBS 1.5.4) does have links to the rest of the observatory. Furthermore, it must be transparent so that a novice such as the PI can change the operation of the detector as needed. The engineering software is done. In the process of testing the multiplexer, we discovered timing problems with the old software, the engineering software was rewritten from scratch. We have used this software extensively. The observing software communicates with other parts of the observatory through these packages. (1) A sequencer controls it and the telescope. (2) A FITS server formats pictures. (3) A data system 2 Loh, 2003, Status Report for October 20 April 2003, Spartan IR Camera.

17 17 saves data and displays pictures. (4) An event logger saves instrumental events and observing events. In addition, the observing software has a graphical user interface (GUI) for the astronomer. We are working on the observing software. We will add links to the packages as they become available. 2.6 Integration (WBS 1.6) There is nothing to report. 2.7 Deliverables (WBS 1.7) Maintenance Manual (WBS ) We have sent a draft of the maintenance manual to S. Heathcote for review. Included is the procedure for installing the mask wheel. That procedure with modifications for each case will be used for installing all of the optics Design and Fabricate Shipping Container (WBS ) The design is complete. Shock absorbers will transfer a 3-g acceleration to the instrument if the shipping container is dropped 15-cm. 2.8 Procurement (WBS 1.8) Procure Field-flattening Lens (WBS 1.8.5) The lenses have been delivered Procure 4 Additional Rotation Stages [Upgrade] (WBS 1.8.7) We damaged two rotation stages by allowing moisture to condense on the bearings. For testing, we now cool the surrounding air to dry it before cooling the rotation stage. We designed a mechanism with a spring to remove the backlash. 2.9 Preplan Spending (WBS 1.9) There is nothing to report.

18 18 3 Appendix Table 6 Milestones Milestone Completed 117 of 147 (79.6%) Date Baseline Completed Scheduled Variance 1 Requisition for Flexible Cable Issued 4-Sep-01 1-Oct d 2 Requisition for Rotation Stage Issued 6-Sep-01 6-Sep-01 0 d 3 Optical Design Finished 7-Sep-01 7-Sep-01 0 d 4 N2 Can Engineered 7-Sep-01 7-Sep-01 0 d 5 A-Frame Strut Engineered 17-Sep Nov d 6 Requisition for Vacuum Blukhead Issued 17-Sep-01 7-Sep-01-6 d 7 Requirements for Optical Alignment Written 17-Sep Sep-01 0 d 8 Vacuum Enclosure & Cryo Box ICD Written 18-Sep Sep-01 9 d 9 Controller Card SCA Tested (Existing Computer 21-Sep Dec d 10 Detector Physical Dimensions Measured 24-Sep Sep-01-2 d 11 Requisition for Mirrors Issued 28-Sep Feb- 104 d 12 Requisition for Detector PCB Issued 28-Sep Nov d 13 Software Requirements Written 28-Sep Sep-01 0 d 14 Method for Optical Alignment Created 1-Oct-01 3-Jan- 68 d 15 Specifications for Telescope Simulator Written 3-Oct-01 3-Oct-01 0 d 16 Requisition for Coordinate-Measuring Machine I 5-Oct Nov d 17 Detector Assembly Concept Developed 8-Oct-01 3-Dec d 18 Solidworks License Delivered 11-Oct-01 9-Oct-01-2 d 19 Mechanism Mounting Blocks Engineered 12-Oct Sep d 20 Select SW Vendor 12-Oct Oct-01 1 d 21 Test-Dewar Concept Sketch Finished 15-Oct Oct-01 4 d 22 Vacuum Bulkhead Delivered 15-Oct Feb- 97 d 23 N2 Can Designed 18-Oct Jan- 60 d 24 Requisitions for Computer for Laboratory Issued 19-Oct Oct-01-2 d 25 Detector Holder Prototype Designed 25-Oct-01 4-Feb- 72 d 26 Mechanism Mounting Blocks Designed 29-Oct-01 8-Mar- 95 d 27 Rotation Stage Test Fixture Engineered 31-Oct Dec d 28 Coordinate-Measuring Machine Delivered 2-Nov Feb- 73 d 29 Rotation Stage Test Fixture Designed 7-Nov-01 7-Jan- 43 d 30 Flex Cable Finished 9-Nov-01 8-Nov-01-1 d 31 Computers for Laboratory Delivered 9-Nov Dec d 32 Project Plan Finished 16-Nov Dec d 33 Cryo-Optical Box Engineering Finished 16-Nov Nov-01 8 d 34 Detector Holder Prototype Fabricated 19-Nov Jun- 157 d 35 Test-Dewar Fabricated 19-Nov Apr- 113 d 36 Detector PCB Finished 21-Nov-01 4-Mar- 73 d 37 Master Layout Designed 26-Nov Nov-01-1 d 38 Rotation Stage Delivered 29-Nov-01 6-Feb- 50 d 39 A-Frame Strut 3D Designed 30-Nov Nov-01 0 d 40 Specifications for Vacuum Enclosure Written 6-Dec Oct d 41 Rotation Stage Test Fixture Fabricated 7-Dec-01 8-Feb- 45 d 42 Requisition for Field-flattening Lenses Issued 7-Dec Oct- 225 d 43 Mask Plate Engineering Finished 7-Dec Feb- 56 d

19 44 Requisition for Window Issued 10-Dec-01 8-Feb- 44 d 45 MLI Requisition Issued 10-Dec-01 3-Dec- 256 d 46 Flex Cable/Bulkhead Assembly Finished 11-Dec Feb- 56 d 47 Specification for Filter Wheels Written 14-Dec Dec-01-4 d 48 Rotation Stage Tested 14-Dec-01 4-Apr- 79 d 49 Mechanism Mounting Blocks Fabricated 14-Dec-01 4-Dec- 254 d 50 Joined Filter Consortium 14-Dec May- 112 d 51 Requisitions for Vacuum Parts Initiated 20-Dec Apr- 86 d 52 Requisition for Rotation Stage Controller & 2nd 25-Dec-01 1-Mar- 48 d 53 Cable for Motors Analyzed 28-Dec-01 8-Feb- 30 d 54 Mask Plate Designed 28-Dec May- 97 d 55 Detector Holder Prototype Thermal Test Finishe 1-Jan- 19-Sep- 187 d 56 Vacuum Enclosure Engineered 3-Jan- 31-Oct d 57 MLI Designed 8-Jan- 12-Feb- 25 d 58 Thermal Reflector Engineered 9-Jan- 17-May- 92 d 59 Deliver Communications Test Software 14-Jan- 30-Jan- 12 d 60 Requirements for Window Written 15-Jan- 18-Jan- 3 d 61 Requirements for Field-Flattening Lens Written 15-Jan- 8-Feb- 18 d 62 Requirements for Telescope Simulator Modified 15-Jan- 10-Dec d 63 Requirements for Pyramidal MirrorWritten 15-Jan- 8-Feb- 18 d 64 Motor PCB Designed 18-Jan- 24-Jun- 110 d 65 Filter Wheel Mounting Block Specified 21-Jan- 21-Sep d 66 MUX Tested at Room Temperature 22-Jan- 8-May d 67 Parts for Test Dewar Assembled 25-Jan- 8-Feb- 10 d 68 Cryo-Optical Box Drawings Finished 30-Jan- 18-Oct- 188 d 69 Vacuum Parts Delivered 31-Jan- 15-Jul- 117 d 70 Telescope Simulator Engineered 31-Jan- 3-Jul- 109 d 71 MUX Tested at Cold Temperature 1-Feb- 5-Aug d 72 Requistions for Parts for Telescope Simulator Iss 8-Feb- 26-Sep- 164 d 73 Motor PCB Fabricated 8-Feb- 10-Jul- 108 d 74 Communications with NI6533 Card Tested 20-Feb- 20-Feb- 0 d 75 Vacuum Enclosure Designed 22-Feb- 13-Nov- 189 d 76 Upgrade Decision for 2nd Channel Made 28-Feb- 10-Jun- 72 d 77 Web Site Created 28-Feb- 8-Mar- 6 d 78 MLI Blanket Delivered 7-Mar- 31-Jan d 79 Thermal Reflector Concept Analyzed 8-Mar- 1-Mar- -6 d 80 Telescope Simulator Designed 11-Mar- 25-Feb d 81 Parts for Telescope Simulator Delivered 13-Mar- 26-Sep- 141 d 82 A-Frame Strut Fabricated 15-Mar- 14-Dec d 83 Software Drives Detector Controller 20-Mar- 14-Mar- -4 d 84 Mask Plate Finished 22-Mar- 5-Jun- 53 d 85 Thermal Reflector Designed 22-Mar- 30-May- 49 d 86 Vendor for Thermal Reflector Selected 22-Mar- 29-Oct- 157 d 87 N2 Can Fabricated 28-Mar- 10-Apr d 88 Detector Tested in Lab 2-Apr- 3-Sep ArcView Drives Detector Controller 3-Apr- 28-Jun- 62 d 90 Rotation Stage Controller & 2nd Stage Delivered 8-Apr- 15-Oct- 137 d 91 Cryo-Optical Box Fabricated 9-Apr- 30-Apr d 92 Detector Tested with Sky 10-Apr- 11-Sep Software Drives Filter Wheels 10-Apr- 20-Sep- 116 d 94 Filter Wheel Designed 12-Apr- 26-Apr- 10 d 95 Minimal Software Complete 24-Apr- 20-Sep- 106 d 19

20 96 Detector Assembly Designed 30-Apr- 17-Mar d 97 Reworked Electronics Finished 1-May- 1-Oct GUI Complete 1-May- 25-Jul d 99 Mirrors Delivered 6-May- 6-Oct Window Delivered 9-May- 2-May- -5 d 101 Baseline Software Complete 14-May- 25-Jul d 1 Thermal Reflector Fabricated 15-May- 15-Nov- 132 d 103 Telescope Simulator Fabricated 17-May- 7-Jul Mirrors Installed in Mounts 20-May- 20-Oct Mask Wheel Engineered 21-May- 25-Feb- -61 d 106 Vacuum Enclosure Finished 24-May- 13-Mar d 107 Mirror Mounts Engineered 31-May- 15-Jul- 31 d 108 Mirror Mounts Detailed 12-Jun- 8-Aug- 41 d 109 Collimator and Camera Mirror Mount Designed 14-Jun- 14-Mar d 110 Mask Wheel Designed 18-Jun- 15-May- -24 d 111 Cryo-Optical Box Thermal Test Finished 21-Jun- 8-Sep Operating Software Complete 25-Jun- 26-Sep Mirror Mounts Fabricated 10-Jul- 13-Jan d 114 Filter Wheels Fabricated 12-Jul- 4-Dec- 103 d 115 Field-Flattening Lenses Delivered 12-Jul- 18-Aug d 116 Test Plan for Filter Wheel Written 12-Jul- 13-May- -45 d 117 Detector Assembly Fabricated 15-Jul- 16-Jun Detector Assembly Finished 22-Jul- 15-Oct Focal-Plane Assembly Designed 23-Jul- 19-Apr d 120 Mask Wheel Fabricated 31-Jul- 21-May d 121 Filter Wheel #1 Tested Warm 7-Aug- 10-Dec- 89 d 122 Focal-plane Assembly Fabricated 13-Aug- 27-Jun d 123 Filter Wheel #1 Tested Cold 15-Aug- 15-Aug- 124 Filter Wheel #2 Tested 22-Aug- 10-Dec- 79 d 125 Mask Wheel Tested 3-Sep- 24-Jun F/21 Collimator & Camera Mirrors Delivered [U 13-Sep- 6-Oct nd Collimator and Mirror Mount Fabricated 13-Sep- 6-Jun d 128 Telescope Simulator Finished 7-Oct- 23-Jul nd Collimator and Mirror Mount Tested 17-Oct- 1-Jul Basic Filters Delivered 13-Dec- 3-Jan d 131 All Filters Delivered 13-Dec- 3-Jan d 132 Instrument Assembled & Aligned at Room Temp 21-Jan Nov Flexure Tested 28-Jan Nov Draft Maintenance Manual Written 14-Feb-03 6-Aug d 135 Draft Software Manual Written 14-Feb-03 9-May Cold Test #1 Finished 18-Feb-03 8-Dec As-Built Drawing Package Assembled 28-Feb Feb Draft Operating Manual Written 14-Mar Mar Maintenance Manual Finished 31-Mar Sep Software Manual Finished 31-Mar Jun Draft Acceptance Test Written 31-Mar Aug Shipping Container Finished 31-Mar Jun Cold Tests Finished 11-Apr Jan Operating Manual Finished 30-Apr Apr Acceptance Test Written 7-May Sep Pre-Ship Acceptance Test Finished, Integration C 14-May-03 5-Feb Project Complete 10-Jun Feb-04 20