Date
Attendees
- Sarah Kendrew
- Brian Brooks
- Nikolay Nikolov
- Everett Schlawin
- Nestor Espinoza
- Knicole Colon
- Michael Regan
- Eddie Bergeron
- Loic Albert
- Elena Manjavacas
Meeting agenda:
- News & Announcements (all)
- Roundtable Cycle 2 calibration plan updates (all)
- Handling LRS SLITLESSPRISM 390 Hz noise (Regan)
- TSO WG work (TSO monitors, non-linearity, 1/f, etc.; all)
- Roundtable check-in
Discussion items
Time | Item | Who | Notes |
---|---|---|---|
5 mins | 1. News & announcements | None! Nestor Espinoza : some cycle 2 stats. huge increase in exoplanet proposals compared to cycle 1 (not all TSOs) the TSO modes are heavily requested as well: esp NIRSpec BOTS TSOs are ~20-30% of JWST usage for cycle 2 proposals (yay and yikes) | |
2. Cycle 2 calibration plan check-in | Cycle 2 calibration plan is not yet fixed - mission office will review the programs before assigning PIDs. NIRSpec: NIRCam:
MIRI:
NIRISS: | ||
3. 390 Hz noise for MIRI | Slides from Eddie & Mike. Noise is actually present in all array configurations, but in most array configs the noise is in phase (which occurs when npixels in subarray is a multiple of 256) . Very visible in SLITLESSPRISM. Initial fix from Ressler is to move the subarray, increasing frame read time by 8% Eddie created a library of solutions with various compromises. Some even shorten the frame time. Quite an impactful change, need to start the transition asap - we need consensus and buy in from stakeholders asap. We should not accept having this additional noise in the data for the lifetime of the mission - we would not have picked this for flight had we known about it. SK: like the smallest size where we gain 6.6% read time NE: what is the cost?
NE: how well can we correct it in data?
We need to quantify with some numbers for the trade-off for this work to assess whether it's worthwhile doing. LA: should we optimize the subarray size to maximize the background coverage if that is proving problematic?
ES: can we make a new subarray to avoid the shadowed region?
| ||
4. TSO Work | Nestor Espinoza | TSO monitor Nikolay Nikolov :
Bad pixels/NaNa Nestor Espinoza : with newest version of the pipeline bad pixels are converted to NaNs. newest processed data shows a LOT of NaNs, more than expected. Probably related to new bad pixel map. | |
5. Roundtable check-in | |||
NIRCam | |||
NIRISS | |||
NIRSpec | |||
MIRI | |||
2 mins | 4. Closing Remarks |