1. SSSC/SITR: FORCAST September 29, 2009 Cornell University Adams/Herter

2. 29-Sept-092 FORCAST Description Facility Instrument Dual-Channel 256x256 Camera w/ Si BIB arrays o 5-25  m with Si:As array o 25-38  m with Si:Sb array 0.75 arcsec/pixel giving a 3.2  3.2 arcmin FOV Selectable Filters in 5-38  m range FORCAST Trimester Review

3. Fold mirrors Collimator mirror SOFIA Focal plane Cryostat window FPA Camera 1 Camera 2 25 mm FORCAST Optical Raytrace f/20 f/5.5 Lyot stop (pupil) 29-Sept-093FORCAST Trimester Review

4. 29-Sept-094 FORCAST/SOFIA Early Science Goals Perform demonstrative science observations Emphasize unique capabilities of SOFIA/FORCAST o Observations at 30 – 40 µm o High spatial resolution in the mid-IR (2″ - 4″) Build collaborations between the science instrument team and external investigators Bridge SOFIA observations with Spitzer observations o Follow-up of regions that are too bright for Spitzer o Follow-up of Spitzer objects with higher spatial resolution Selected Early Short Science Objects o Winter/Spring:Orion o Summer:Galactic Center, M17 FORCAST Trimester Review

5. Early Science Filter Configuration 29-Sept-095 PositionFilter Wheel SWCLWC FW 2FW 1 FW 2 1 (Home) OPEN 24.4  m (R=7.5)38.0  m (R=8.8) OPEN 2 5.3  m (R=33)19.5  m (R=3.8) OPEN 30.6  m (R=5.7) 3 6.3  m (R=48) OPEN 33.4  m (R=18) Grism 5 (R=140) 4 6.6  m (R=34)8.6  m (R=42) ND 34.8  m (R=8.3) 5 7.6  m (R=15)11.0  m (R=12) Door Occulting Mask 6 ND 11.28  m (R=56)11.8  m (R=16) Grism 6 (R=250) FORCAST Trimester Review

6. 29-Sept-096 200820092010 Preship Review Ground integration Short science flights JFMAMJJASONDJFMAMJJASOND Early Science Timeline 10/16/08Preship Review 12/09Ship to DAOF; Post-ship checkout 1/10Ground installation 2/1/10Lineops #1 3/4/10First Light Flight 7/6/10Short Science Flights (also includes facility checkout) 12/7/10Start Basic Science Flights JFMAMJASONDJ Ship to DAOF Basic science flights First light flight FORCAST Trimester Review

7. 29-Sept-097 Detailed Timeline & Personnel Loading DatesPersonnelTasks jsMCCS Checkout Mid-12/09Ship Mid-12/09Arrival of instrument Mid-12/09geg,ch,jda,tlhPost-ship operations, warm test, leak check 1/10geg, chCooldown 1/10geg,ch,jda,tlh,jmdbBaseline testing & margin 1/10geg,ch,jda,tlh,js,jmdbInstall on plane 2/1/10geg,ch,jda,tlh,js,ldk,jmdbHangar/Line ops (9 nights; 5 contingency) 3/4/10tlh,jsFirst light flight 7/6/10geg,ch,jda,tlh,js,ldk,gjs,tn, jmdb (not all fly at once) Short science flights FORCAST Trimester Review

8. Line Ops Plan 29-Sept-09FORCAST Trimester Review8 Test NameDescriptionMode FOR-LO-1Alignment of FORCAST to TASTARE FOR-LO-2SMA Focus SequenceSTARE FOR-LO-2aOcculting Masks TestSTARE FOR-LO-3Ground Boresight DeterminationSTARE FOR-LO-4TA EmissivitySTARE FOR-LO-5Chop and Nod Settle Times; Image QualityC2N FOR-LO-6Optimum Chop FrequencyC2N FOR-LO-7Plate ScaleC2N FOR-LO-8Asymmetric ChopC2N FOR-LO-9Pointing StabilitySTARE FOR-LO-10Header Population for Acquired DataSTARE, C2N, C2ND FOR-LO-11Data Reduction Pipeline VerificationC2N, C2ND FOR-LO-12EMI/EMC Ground TestingSTARE, C2N, C2ND FOR-LO-13Flight Scenario for Determining Frame RatesSTARE FOR-LO-14Flight Scenario for Focus DeterminationSTARE FOR-LO-15Flight Scenario for Standard Star ObservationsC2N, C2ND FOR-LO-16Flight Scenario for Science ObjectC2N, C2ND FOR-LO-17Flight Scenario for Science ObjectSTARE (Scan) FOR-LO-18Flight Scenario for Science ObjectSTARE (step)

9. Status Chart CategoryTech.CostScheduleComment a. CryostatNo problems b. OpticsNew Lakeshore Mesh Filters are installed and tested Dichroic is still intact and performing adequately Calibration Box is ready for end-to-end testing c. DetectorBackup 256x256 Si:Sb ready for flight New Si:Sb larger format array in Fab (DRS Tech) d. ElectronicsBoth channels are operating synchronously e. SoftwareIMC is implemented; ready for testing CD36 f. Opto-mechanical systemPupils are aligned to simulated secondary Arrays are co-aligned to center of field FPA masks are installed g. AirworthinessAll documents are submitted h. DCS j. DocumentationSome done, more to do k. Commissioning PlanPre-ship version to be released after cooldown 36

10. FORCAST Calibration Box Design Layout in front of FORCAST Illumination at the detector KRS-5 Lens images a black hot source onto the FORCAST Lyot stop Chopper blade provides a background source 10/16/200810FORCAST Preship Review

11. Calibration Box

12. Lakeshore Mesh Filter Image Quality 29-Sept-0912 Results are consistent with diffraction-limited performance 33.4 µm Grid of 200 µm diam. Pinholes @ field stop (77 K) 38.0 µm24.4 µm FORCAST Trimester Review

13. Dichroic Performance 29-Sept-09FORCAST Trimester Review13 Barr 2 has better reflective performance B Files 2568-2801 R files 2411-2566 Barr3Barr2Mirror/openR/T_Barr3R/T_Barr2 SWC11.03221368946110.700.80 SWC11.32767333643460.640.77 SWC19.53780419548680.780.86 SWC24.41348162718110.740.90 LWC30.6+ND21390140533700.410.42 LWC33.41865186643510.43 LWC34.82499247551260.490.48 LWC38.02064202249580.420.41

14. Array Optimization Sb-083, 30.6 µm + ND2, Low Cap Detectors are optimized for best S/N vs.: Detector bias Well size Frame time Determine trade-off between signal vs. dark current, hot pixels 29-Sept-0914FORCAST Trimester Review

15. 29-Sept-0915 Budget Status FY10 budget o Carry over of travel funds from previous year o Delays will require an additional ~ $100k of support above current allocation No future funding for larger format Si:As detector FORCAST Trimester Review

16. 29-Sept-0916 Are We Ready? Yes we are!! FORCAST is working o Mechanisms and software appear very robust Technical things to do yet (no show stoppers) o End-to-end testing of Calibration Box o Testing of IMC (shift-and-add) o Implement acquisition scripts for lineops flight scenarios o Implement digital detector bias control Schedule risks o None Early science planning underway for range of possible flight dates, e.g. Orion or Galactic Center emphasis o GC plan requires tweaking per new (June 2010) schedule for ESS o Line Ops will test different observing strategies (C2N, Scanning, etc.) FORCAST Trimester Review