GNIRS PROGRESS REPORT

April 24– May 20, 2002

           Accomplishments / Status 

  Summary:  92% of the work from the Restart Review to delivery has been completed.  Progress was made on radiation shield assembly, bench assembly and wiring, collimator characterization and mechanism cold testing.

Fabrication is complete. Any remaining fabrication will be considered part of assembly rework or part of the integration process.  Delivery of the remaining SR camera lens is expected in late May, and the lens will be integrated into the camera following flexure testing. Two gratings, which had wrong rulings, have been redone and delivery is expected this week. Integration of the gratings and prisms onto their respective turrets is scheduled for next week.

All mechanisms have completed cold testing except the Slit mechanism, which did not pass cold testing.  An investigative team has been assigned to determine the exact cause of the anomaly.  The assembly has until June 30 to complete cold testing before impacting the instrument delivery schedule.

Flexure testing has been delayed until mid-July due to late shipment and installation of the flex rig, and will occur after the 1st instrument cold test instead of before. 

All testing is scheduled to complete and the instrument shipped to Chile on November 29th.  All planned contingency, except for the 4th cold cycle, has been used.

Next Milestone: The next major project milestones are:
                                                - Instrument vacuum checks in June
                                                - Bench installation in June
                                                - Slit mechanism cold testing completion in June

  Earned Value: 

 

October

November

December

January

February

March

April

May

BCWS

$3,145,000

$3,192,781

$3,236,748

$3,304,286

$3,344,496

$3,413,125

$3,462,160

$3,504,878

BCWP

$2,573,084

$2,617,408

$2,884,471

$2,911,411

$2,930,888

$2,970,031

$3,035,216

$3,156,912

ACWP

$2,938,004

$3,122,731

$3,313,415

$3,383,383

$3,453,168

$3,537,018

$3,756,257

$3,858,289

SPI

0.82

0.82

0.89

0.88

0.88

0.87

0.88

0.90

CPI

0.88

0.84

0.87

0.85

0.85

0.84

0.81

0.82

 

This table reflects planned and actual charges to the project as of May 20, 2002.  We have spent $1,491,615 in capital to date.

 Project Management: (92% complete)

The project plan may be viewed on the GNIRS web site at: http://www.noao.edu/ets/gnirs/ under Management, Planning. The current delivery of the GNIRS instrument is November 29, 2002.

  Systems Engineering: (100% of planned work) 

  Mechanical Design, Fabrication, Assembly and Test: (96% overall)   The major activity in this work package has been drawing completion and cleanup, fabrication, mechanism testing and rework.

Mechanisms: (96% complete overall).


 

March

April

May
Status

Slit

99%

99%

99%

Rework and Cold test


Benches: (100% complete overall).  Benches are complete.  Bench wiring is in process, but is considered an integration activity.

Fixed Assemblies: (91% complete overall).   Only the Thermal Distribution Assembly left which will be closed out when it is sized and installed into the dewar.

 

March

April

May
Status

Cryo Cooler

90%

94%

100%

Complete

Thermal Distribution Assembly

75%

75%

75%

Assembly

LN2 Pre-Cool

87%

83%

100%

Complete

 

   Electronics: (89% complete overall).  Basic work complete.

 

March

April

May

Status

IfA Electronics Box

33%

33%

33%

In check out

External Cabling
(Bulkhead to TE)

36%

36%

36%

Used in mechanism test; need only termination at one end

Bulkhead Internal Cabling

58%

58%

69%

Assembly

Documentation

95%

95%

95%

 

 

  Software Development: (90% complete overall).  The work includes adjustments to the software during testing 

 

May

Array and Instrument Controller checkout

88%

 

 

   Alignment and Integration: (43% complete overall)

 

March

April

May

Telescope Simulator

69%

88%

93%

I.    Dewar and Structure

-

-

-

II.   Mechanical Integration

-

43%

43%

III. Warm Tests

-

-

-

IV.  Cold Tests

-

-

-

 

  Deliverables: (51% complete overall)

Work in this area has focused on the outlines for the Hardware and Software Maintenance manuals.

 

March

April

May

Comments

Instrument Hardware

-

-

-

 

Training

-

-

-

 

Manuals

15%

15%

16%

Manual outlines complete.  Draft Software manual 67% complete

As-Built Fabrication Drawings

-

-

-

 

 

  Procurement: (96% complete overall). 

 

Mar

April

May

Comments

Optics

98%

99%

99%

SRC camera lens, simulator optics still outstanding

 

 

           Problems / Solutions 

Flexure rig delay has caused re-planning of first integration steps.   The slit mechanism did not pass cold testing; the cause is being investigated.

             Key Personnel 

 

One mechanical designer and two instrument makers released from project effective May 1st.

 

 

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