NGAO Science Operations during the SD phase (activities no longer active)

Your comments are welcome on these documents. I am always looking for inputs and suggestions.. Ask me for the latest versions of the documents if needed.

1. Requirements for Science Operations

• Mar. 2008:
  • Revised KAON 558: dithering and offsetting with NGAO
  • working on observing scenarios...

• Feb. 2008:
  • Revisited the WBS 6 dictionary (hm, hm.. likely not the latest draft though)
  • Version 1 KAON 558: dithering and offsetting with NGAO
  • Working with Chris on NGS and LGS acquisition design
  • WBS 3.4.1.1 Editing the draft document for the Pre-Observing Interfaces
  • Editing the SRD document (KAON 456) v1.15 to include the Science Operations requirements from both the Observer and the Observatory point-of-view.
  • I am working on an Observation Timeline Document, which helps me understand, envision and define many aspects of the operations...
  • I present a possible NGAO high-level architecture design in this ppt file

• Apr. 2007: Now that KAON 463 and 476 provide a background for the science ops reqts, we resumed the work on the science operation draft requirements.
• Feb. 2007: We haven't done much on writing the science requirements, as we realized this was very premature: we haven't detailed yet the Observing Scenarios, we needed an assessment for current LGS operations as well as a vision for the possible Observing Models.
  • A very early draft document for the Science Operations requirements, was last updated in January (now quite obsolete as most of it was included in KAON 463/476 and sci. ops reqts).

2. Work Scope Planning Sheets

Below are direct links to the Work Products page

• WBS 3.4.1.1: Pre-Observing Interfaces (approved by EC)
• WBS 3.4.1.2: Observing Interfaces (approved to EC)
• WBS 3.4.2.1: AO-Instrument Operations Architecture (updated on 10/04, needs discussion with CN, EJ, VV)
• WBS 3.4.2.2: AO-Instrument Operations Optimization (requires above WSPS to be defined and agreed upon)

• WBS 3.1.1.11: Observing Efficiency (no changes since early 07)
• WBS 3.1.1.12: Observing Uptime (no changes since early 07)

3. Observing Model Trade Study: KAON 476

April`07: We now have a version 1.0 document ready for review and to be shared with the NGAO team. The earlier draft was discussed with the collaborators late February-March. The workscope planning sheet was approved quite a while ago.

• 5/8 KAON 476 available for review.
  • Included comments from Randy Campbell.
  • Provided a copy to Director Armandroff.
• 4/10 version 1.0 of the Trade Study available for review.
• Comments on the Draft Observing Model trade study:
  • Bob G.' comments (02/25).
  • Rich D.' comments (03/14).
  • DLM and RG had a telecon to discuss his comments (03/22)
• 02/22: ObsModelTS.doc is the draft version 0.2 report for the study

4. Assessment on current LGS operations: KAON 463

We present the following document below and would welcome any comments you would have. We believe this is quite a final version for this document.

• KAON 463: Lessons learned for Keck LGS operations: Weather Impact, Efficiency and Science Operations Model , D. Le Mignant, Feb 2007

5. Observing Scenarios

• A dedicated web page for the Observing Scenario was created by RDekany. So i moved things over there.

6. Observing Efficiency and Uptime Performance Budget (idle)

• April 2007: what are the main driver for observing efficiency and uptime?
  • KAON 463 (lessons learned) describe the main losses on current systems
  • DLM produced this NGAO observation time line to investigate the main drivers and risk areas.

Observing efficiency and uptime are two consecutive items under the WBS (3.1.1.11 and 3.1.1.12) and we have chosen to study them in parallel; thus benefiting from the experience and momentum of the same group of people. It is not clear yet how we will report on the conclusion for each of these two WBS.

The rough guideline we would like to follow is the following:

• What are the lessons learned from current LGS AO systems and science instruments (Lick, Keck and Palomar) for the observing efficiency and uptime budgets?
• What are the inputs to estimate the requirements for system uptime and observing efficiency?
• What could be a sustainable requirement?

Preliminary requirements from NGAO proposal

Here are the Observing Efficiency and Uptime requirements from the June 2006 NGAO proposal (Section 4.3.2.8, pg 123):

"4.3.2.8 Observing Efficiency and Up-Time Requirements:

• Observing Efficiency
  • ≤ 20 min overhead per night
  • ≤ 120 sec between end of slew and ready for science exposure
  • ≤ 10 sec between start of nod command and ready for science exposure
  • ≤ 15 sec to reconfigure between J, H and K-bands
  • ≤ 120 sec to switch between LGS and NGS mode
  • ≤ 600 sec to switch between NGS and LGS mode (assuming daytime setup)
  • ≤ 120 sec to switch between AO science instruments (assuming daytime setup)
• Up-time
  • ≤ 5% of time lost to AO problems

We are not at the point in the design where these requirements can be evaluated. These are all reasonable requirements based on the existing Keck AO systems."

Meetings

• notes from Dec. 07 meeting
• notes from future meeting