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| imagerteleconnotes20180214 [2018/02/14 14:05] – hanany | imagerteleconnotes20180214 [2018/02/21 12:38] (current) – wenxx181 | ||
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| ====== Telecon 20180214 ====== | ====== Telecon 20180214 ====== | ||
| - | Attending: | + | Attending: |
| - | Notes by : \\ | + | Notes by : Qi \\ |
| === Agenda=== | === Agenda=== | ||
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| * {{:: | * {{:: | ||
| * [[https:// | * [[https:// | ||
| + | * Images from Kris | ||
| + | * | {{:: | ||
| * Focal Plane updates (Karl) {{:: | * Focal Plane updates (Karl) {{:: | ||
| === Notes === | === Notes === | ||
| + | |||
| + | * Workshop | ||
| + | * Working on program, plan to release in next few days | ||
| + | * about: science, report, white paper if there is, data complement other data sets | ||
| + | |||
| + | * Spacecraft (Amy) | ||
| + | * we will need space craft bus, everything around the instrument | ||
| + | * biggest challenge is point the instrument, spinning ,precession | ||
| + | * mission TeamX | ||
| + | * orbit (shape, size of orbit, sun & moon), ground processing | ||
| + | * industry parter, preliminary design; | ||
| + | * requirement for the craft, pointing stability & accuracy, mass, power we need | ||
| + | * a week after TeamX | ||
| + | |||
| + | * Attitude control requirements (Jacques) | ||
| + | * sampling requirement | ||
| + | * For CORE, 1/4th, constrained by scan strategy | ||
| + | * for each position on the sky, we want to compare compare data, important for systematics | ||
| + | * The requirement of sampling will translate to the requirement of altitude | ||
| + | * Uncertainty on the position of spin axis, from one scan to other, translated to difference between two scans. | ||
| + | * good control helps reduce gaps as much as we can | ||
| + | * | ||
| + | * Cross-scan sampling per precession | ||
| + | * Currently, T_prec = 10 hours, T_spin = 1 min, which lead to theta = 3' | ||
| + | * 3' is good for 100 GHz, but not above; we can change T_spin or T_precession | ||
| + | * Kris does not think changing T_precession / T_ spin can solve the problem globally. Very long precession, penalty is pile up enormously at poles. | ||
| + | * we are assuming engineering achieving nominal, by 1 arcmin in 3 sigma error per spin. | ||
| + | |||
| + | * Point reconstruction | ||
| + | * alignment of instrument FOV with reference of spacecraft. change should not be faster than calibration | ||
| + | * Jacques: we need to do simulation to get final number for point reconstruction | ||
| + | * Shaul: 1’’ will be driven by systematics. We will see if 1’’ is reasonable given r value. | ||
| + | * Amy: too loose, worse systematics; | ||
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