MROIFastTipTilt.DerivedRequirementsDocumentOutline History

Hide minor edits - Show changes to markup

May 21, 2010, at 04:55 PM by jsy1001 -
Added line 8:
  • Identify missing requirements
May 21, 2010, at 09:57 AM by MF -
Changed lines 12-13 from:

Existing documents

Derived requirements matrix Attach derived-requirements-v1.pdf?

to:
May 21, 2010, at 09:52 AM by MF -
Changed lines 12-13 from:
to:

Existing documents

Derived requirements matrix Attach derived-requirements-v1.pdf?

May 20, 2010, at 02:25 PM by jsy1001 -
Changed lines 1-2 from:

This outline is under construction, by JSY and MF.

to:

This outline is under construction, by JSY and MF. Note that HTML (and hence PmWiki) doesn't support "proper" outline numbering, i.e.
1
1.1
1.2
1.1.1

Changed lines 10-11 from:
to:
  • Get document identifier
Changed lines 19-20 from:
  1. Pixel Scale
to:
  1. Pixel Scale\\
Changed lines 25-27 from:
  1. Design assumptions

May refer to high-level features of assumed design described in "Conceptual Design Assumptions" above

to:
  1. Design assumptions
    May refer to high-level features of assumed design described above in "Conceptual Design Assumptions"
Changed lines 71-75 from:
  1. Top-down image quality budget, by component
  1. Thermal Control
to:
  1. Top-down stability budget, by component
  1. Thermal Management
Changed lines 77-79 from:
to:
  1. Heat dissipation
  2. Power consumption
Changed lines 81-82 from:
to:
  1. Camera in a box etc.
Changed lines 84-85 from:
to:
  1. Cooling needs
  2. Power budget
Added lines 110-123:
  1. Max EMCCD gain to be used
  1. Dynamic Range
    1. Top-level requirements: none?
    2. Design assumptions
      1. Brightest stars we want to use
      2. Strategy for setting frame rate and EMCCD gain as function of seeing and target magnitude
    3. Derived requirements
      1. Need for ND filters?
      2. Min EMCCD gain to be used
May 20, 2010, at 02:10 PM by jsy1001 -
Added lines 1-100:

This outline is under construction, by JSY and MF.

TODO:

  • Do any derived requirements depend on others? If so, how to express this in the document?
  • Copy finished outline into a proper document

Derived Requirements Document

  1. Introduction
  2. Conceptual Design Assumptions
  3. Pixel Scale

Note that there is a top-level requirement on the pixel scale for the FLC.

  1. Top-level requirements
    1. FTT/NAS: FOV
  2. Design assumptions

May refer to high-level features of assumed design described in "Conceptual Design Assumptions" above

  1. Derived requirements
    1. Maximum and minimum pixel scales for FTT/NAS
  1. FTT mode subframe size
    1. Top-level requirements
      1. FTT-mode FOV
      2. Dispersion-offset guiding: rate of change of dispersion offset
      3. Off-axis TT sensing: Max. off-axis distance for TT reference object
    2. Design assumptions
      1. Thermal drift rate of TT zero point
    3. Derived requirements
      1. Min. subframe size /arcsec (so its independent of pixel scale)
  2. Image Quality
    1. Top-level requirements
      1. FTT/NAS: none
      2. FLC: XXX
    2. Design assumptions
      1. Two or more conceptual layouts
    3. Derived requirements
      1. Top-down image quality budget, by component
  3. Stability of Tip-tilt Zero Point
    1. Top-level requirements
      1. FTT/NAS: Stability req
      2. FLC: Looser stability req
    2. Design assumptions
      1. Two or more conceptual layouts
    3. Derived requirements
      1. Top-down image quality budget, by component
  4. Thermal Control
    1. Top-level requirements
    2. Design assumptions
    3. Derived requirements
  5. Closed-loop Bandwidth
    1. Top-level requirements
      1. 3dB bandwidth of 40Hz
    2. Design assumptions
      1. Servo type
    3. Derived requirements
      1. Latency budget: frame rate, camera latency, compute latency
  6. Limiting Sensitivity
    1. Top-level requirements
      1. Limiting magnitude and allowed TT residual at limiting magnitude
    2. Design assumptions
    3. Derived requirements
      1. Throughput budget
      2. CCD noise performance
Recent Changes (All) | Edit SideBar Page last modified on May 21, 2010, at 04:55 PM Edit Page | Page History
Powered by PmWiki