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. All overheads are up for discussion including but not limited to command processing, readout time, repointing, control loops (guide, focus), filter exchanges, FITS file writing and data transport to IPAC. Processing speed at IPAC is not on the agenda.

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_v2.5.xlsx

Logistics

Agenda

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

Timing diagram as at Mar 15, 2017:

-- RogerSmith - 13 Mar 2017

• ZTF_command_sequence_timing.xlsx: measured ZTF command timing

• Timing_Review_2016-03-15.ppt: ZTF Timing Review: Camera Command Processing

• hexapod.pptx: ZTF Timing Review: Hexapod description and timing measurements