TimingReview_Mar15_2017 < Palomar/ZTF

---+Timing Review March 15, 2017

This review will examine the current observation overheads and speed-performance trades.   These affect both:
   * survey efficiency
   * data delivery time  (and thus time from observation to event detection) 

It is understood that we do not have final, or in some cases even preliminary results, but the purpose of this meeting is to focus attention on these important issues and make sure that we are moving in the right direction and will arrive in time.  All timing issues are up for discussion including but not limited to  command processing overheads, readout time, repointing, control loops (guide, focus), filter exchanges, FITS file writing and data transport to IPAC.

The official timing diagram for an exposure sequence is here:   (a screen shot is included below) 
   * http://www.oir.caltech.edu/twiki_oir/pub/Palomar/ZTF/PerformanceBudgets/ztf_timing_v2.3.xlsx

---++ Logistics

| *Time* | 2017, March 15, 11 am |
| *Location* | Cahill 126 |
| *Polycom Phone* | (626) 395-8884 |
| *Backup Phone* | (626) 395-8646 |
| *Video conferencing* | Polycom |

---++ Agenda
Start	Minutes	Presenter	Topic
| 11:00 | 10 | Smith | Introduction: Timing diagram; timing budget allocations |
| 11:10 | 15 |Henning | Telescope slew and settling |
| 11:25 | 10 | Henning | Dome and windscreen slew and settling |
| 11:35 | 10 | Porter | Filter exchange |
| 11:45 | 10 | Milburn | Tip-Tilt-Focus analysis; guider latency |
| 11:55 | 10 | Cromer | Hexapod control |
| 12:10 | 15 | Kaye | CCD readout time; noise-speed trade |
| 12:20 | 10 | Hale | Camera command processing;  compression, FITS writing |
| 12:30 | 10 | Riddle | Data transfer from ZTF servers to IPAC |
| 12:40 | 10 | Riddle | Observation scheduling and control |
| 12:50 | 10 | Dekany |Future milestones and dates |
| 13:00 | 15 | Discussion and action item review |
| 13:15 |  |  | Adjorn | 

Please attach your presentations below.

---++ Guidelines

Speakers are asked to present:
  * Design values
  * Describe current/planned measurement methods
  * Data on current performance (if available).
  * Speed-performance trades (eg. read noise vs. read speed;  slew time vs. settling accuracy)
  * Plans for further tests and improvements.
  * Timeline for further work




-- Main.RogerSmith - 13 Mar 2017
   * as at Mar 13, 2017: <br />
     <img src="%ATTACHURLPATH%/ZTF_exposure_timing.png" alt="ZTF_exposure_timing.png" width='1635' height='647' />

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	ZTF_exposure_timing.png	r1	manage	287.4 K	2017-03-13 - 19:49	RogerSmith	as at Mar 13, 2017

This topic: Palomar/ZTF > WebHome > PerformanceBudgets > TimingReview_Mar15_2017
Topic revision: r1 - 2017-03-13 - RogerSmith