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systematicswg:telecons:2018-01-17:start [2018/01/17 11:25] – bcrillsystematicswg:telecons:2018-01-17:start [2018/01/17 12:05] (current) – bcrill
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     ** nominal scan strategy information can be found here: https://zzz.physics.umn.edu/ipsig/optimizingscanstrategy/start     ** nominal scan strategy information can be found here: https://zzz.physics.umn.edu/ipsig/optimizingscanstrategy/start
     ** Plan for toast runs: PICO focal plane layout not trivial(because not hex-packed), but LBL folks.  Four detectors are no problem.     ** Plan for toast runs: PICO focal plane layout not trivial(because not hex-packed), but LBL folks.  Four detectors are no problem.
-    ** Gain stability: Maurizio about to get started: similar analysis as done for CORE, sims of dipole observations + sims of gains per detector, use custom mapmaking code to solve for gain drift.  Look at the CORE systematics paper.+    ** Gain stability: Maurizio about to get started: similar analysis as done for CORE, sims of dipole observations + sims of gains per detector, use custom mapmaking code to solve for gain drift.  Look at the CORE systematics paper for details + link to source code for simulations (pdf file).
     ** Far Sidelobes: GRASP sims available (see Imager page).       ** Far Sidelobes: GRASP sims available (see Imager page).  
-    ** Absolute Polarization Angle calibration.  Analytic solution to look at what happens when we don't solve for absolute polarization angle (by say, minimizing EB and TB).+    ** Absolute Polarization Angle calibration.  Can use analytic solution to look at what happens when we don't solve for absolute polarization angle (by say, minimizing EB and TB).
   * Cubesat calibration concept   * Cubesat calibration concept
 +    ** original idea proposed for Litebird
 +    ** some resources coming in a few months for some preliminary engineering work to be done.  This is likely to provide some results on a time scale that is useful to PICO.
 +    ** will try to generalize for Litebird and PICO in the near term.
 +    ** proposing to ESA (6 March deadline), building up a consortium for a larger 3 year cubesat project.  Will study the performance gains for a larger mission (e.g. CORE)
 +    ** The idea: a piggyback satellite that autonomously deploys and positions itself.  Attitude and orbital control are the key issues.
 +    ** goal is a few kg mass, and cost ~ 1% of total cost of mission.
 +    ** The idea is to "Calibrate Everything"!  Polarization angle, photometry, main beams, far sidelobes.  
 +       * Cover wide frequency band: 10's of GHz, 40-400 GHz originally conceived.  
 +       * Monochromatic tones that can be swept in frequency.
 +     * Future ESA work will study some key trades, cost, mass, etc., and even possibly look at hardware demos.
 +   * Do Galactic science need better than 1 degree precision in polarization angle?
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systematicswg/telecons/2018-01-17/start.1516209902.txt.gz · Last modified: 2018/01/17 11:25 by bcrill

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