NIRISS Science Team Meeting - Activities and Timeline Overview
"Discover the details of the NIRISS Science Team Meeting in October 2015, including goals, hardware changes, commanding procedures, test procedures, and the CV3 timeline. Explore the functional tests, initial flux evaluation, and important dates related to NIRISS performance characterization. Stay updated on the latest developments and procedures for the NIRISS instrument on JWST."
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NIRISS Activities in CV3 Andr Martel NIRISS Science Team Meeting Oct 2015
Overview Goals (for NIRISS performance): 1. Characterize and verify the performance of all the modes of NIRISS (including new detector). 2. Collect data for reference files (JWST calibration pipeline, aXe, etc ). Hardware changes since CV2: new grisms (GR700XD, GR150R), new detector, new wheel motors. Important dates: Oct 21: ISIM CV3 TRR Closeout Review Oct 26: AFC/SFT and pumpdown NIRISS Science Team Meeting Oct 2015
Commanding: OTP (state tables), OSS, CECIL Illumination sources: 1. NIRISS internal lamps (FLAT1, FLAT2, LAMP1, LAMP2) 2. OTE Simulator (OSIM): a. Monochromatic sources (0.64, 1.06, 1.32, 1.55 m) b. Continuum sources (Tungsten) (1 5 m) c. Flat field lamp/diffuser Monitor the mechanisms usage (DW, CFM, lamps) NIRISS Science Team Meeting Oct 2015
Test Procedures About 40 test procedures. Most relevant: NGIN Title JWST-PROC-026716 ISIM Element Cryo-Vacuum #3 Test JWST-PROC-027875 OSS Warm Darks Cryo-3 Test JWST-PROC-026314 OSIM Initial Flux Evaluation JWST-PROC-016344 SIDECAR ASIC and FPA Tuning JWST-PROC-026498 ISIM Comprehensive Performance Test Part 1 JWST-PROC-026482 OSIM and SI Checkout JWST-PROC-026481 ISIM CV3 Optical Baseline Procedure JWST-PROC-026318 NIRISS Performance Characterization JWST-PROC-027876 OSS SI Characterization (SIC) JWST-PROC-027877 Day in the Life (DIL) JWST-PROC-026483 Final Optical Performance Also: AFC/SFT procedures NIRISS Science Team Meeting Oct 2015
CV3 Timeline NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 1 Functional Tests (AFC/SFT) (Oct 26) start cooldown Warm darks (Nov 17-19) 1. OSS visits (NGROUPS=88) 2. 80 60 K NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 1 Initial Flux Evaluation (Nov 20-22): 1. Calibration of the OSIM source fluxes, temperature, and attenuation, pulse widths and delays, diffuser lamp, etc . Updates to the Test Planning Tool (TPT). 2. OTP0.2.9.0.NIS, 0.2.9.6.NIS, 0.2.9.8.NIS, 0.2.9.3.NIS, 0.2.9.7.NIS Reach cold plateau ( 37.5K in CV2) Turn on NIRISS FPA heater with CECIL (Nov 22) NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 1 ASIC tuning (Nov 23-27; Thanksgiving) 1. Run 1: NIRCAM (12 hours), NIRISS, G1, G2 (7 hours each) 2. Run 2: fine-tuning (same order, shorter) 3. Analysis by ComDev 4. Quick turnaround (~24-36 hours): parallel analysis, metrics Actions for NIRISS team: 1. Update the bad-pixel map. 2. Future state tables: - Update SOSS sweet spot pixel (if necessary). - Update the four NRM science pixels (and subarray). NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 2 CPT (Comprehensive Performance Test) (Nov 28-Dec 6) 1. NIRISS internal lamp checks and parallel darks and backgrounds 2. OTP commanding (state tables) and CECIL NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 2 OSIM + SI Checkout (Dec 6-19) 1. Chamber background checks (OTP0.2.0.2) 2. Focus Sweeps: OSIM and CFM (OTP0.5.NR.1, 0.5.NR.2) 3. Grisms and NRM Checkout (OTP0.2.4.1.NR) a. copy of some lines of the NIRISS Perf Verification b. Verify/confirm ( first light ) - verify location of SOSS sweet spot pixel - spectral and spatial location of GR700XD traces - pointing/subpixel dithers at the four NRM pixels - tilt of GR700XD and GR150C/R traces - ghosts/stray light in the grisms (glint, GR700XD, etc ) - OSIM source fluxes NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 2 4. Actions for NIRISS team: a. Choose best CFM focus. b. Decide if trace tilt tests must be executed (7.15 and 7.16) c. In state tables of Performance Verification: - update focus (TPT) - update pixel of SOSS sweet spot - update pixels of NRM pixels and subpixel offsets - update fluxes of OSIM sources NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 2 Initial Optical Baseline (Dec 20-21) 1. Mostly for trending 2. Short OSIM flat field and pupil alignment check (PAR) Critical Tests (Dec 21-23) 1. Includes 7.17 Detector Linearity (after NIRCAM and before FGS for warm lamps) Christmas break (Dec 24-26) NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 2 NIRISS Performance Verification (Dec 28-31) 1. Majority of NIRISS observations (and mechanism usage). 2. OTP commanding (7.*), e.g., 7.5 NRM Verification, 7.7 GR150C/R Wavelength Calibration, etc 3. Other ISIM tests for requirements verification (OTP4.3.NR Field-of-View, OTP4.5.NR Rogue Path, etc ) 1. NIRSpec is parallel (OSS) 2. See JWST-STScI-004354 or JWST-RPT-027763 http://www.stsci.edu/~martel/NIRISS_CV3_perfver_martel.pdf NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 3 Transition to warm plateau ( 43K) (FPA heater off/on) OSS + SI Characterization (SIC) (Jan 8-10) 1. Exercise OSS scripts for all the NIRISS modes (including a short CFM sweep); NISRAPID and NIS readouts 2. OSIM source on; 31 visits, 67 activities NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 3 NIRISS Darks (Jan 10-11) 1. In parallel to MIRI performance tests 2. CECIL commanding for full frames and subarrays. OSS Day-in-the-Life (Jan 13-15) 1. NIRISS exposures in F158M + CLEAR only 2. 7 visits, 21 exposures (38 integrations, NGROUPS = 6-12) NIRISS Science Team Meeting Oct 2015
CV3 Timeline Part 3 Final Optical Performance (Jan 16-17) 1. Trending: short OSIM flat field, pupil alignment check 2. CFM adjustment for 0g 3. DW at CLEARP + F444W for ambient metrology Warmup 1. Turn off NIRISS, start warmup (Jan 18) 2. Open chamber (Feb 6) NIRISS Science Team Meeting Oct 2015
Post-CV3 Analysis Rapid turnaround and formal documentation in order to: 1. Verify requirements. 2. Characterize and assess the performance of each mode. 3. Update or change the operations. 4. Create the final pre-flight set of calibration reference files for all modes (due 6 months after the completion of CV3). Note: other analyses by the ISIM team (alignment, trending, etc ) NIRISS Science Team Meeting Oct 2015
Summary Will verify and characterize all the modes of NIRISS and collect all necessary data for launch. OTP number of exposures: > 850 (all of CV2: ~1230) OTP number of integrations: > 4830 (all of CV2: ~10900) Mechanism usage (current tests; no repeats; OSS separate) 1. Test Planning Tool: 85% (PW) and 75% (FW) of allocation 2. Worst-case scenario: 145% (PW) and 135% (FW) Web site with CSV of state tables, OSS visits, etc : http://www.stsci.edu/~martel/CV3 NIRISS Science Team Meeting Oct 2015
Material Orientation (Oct 16): Shared Files / Entire JWST Project / ISIM / Reviews / ISIM CV3 Orientation /ISIM CV3 Orientation (10-14-15_CV3_Training.pptx) https://ngin.jwst.nasa.gov/Sharefile/Sharefileview.asp?ID=21558 TRR on NGIN: Root / Entire JWST Project / ISIM / Reviews / ISIM CV3 TRR / Final Charts & Final Backup Optics pre-TRR on NGIN: Root / Entire JWST Project / ISIM Optics / CV3 optics pre-TRR 17 Sep 2015 NIRISS Science Team Meeting Oct 2015
