Sheet 1
FTT/NAS
  Top-level Requirements
    Operating Modes
      1: Mode switch < 5s
      2: Idle mode
      3: Command response: idle mode
      4: FTT mode
      5: Estimate image FWHM in FTT Mode at >=0.1 Hz
      6: Acquisition Mode
      7: Estimate image FWHM in Acquisition Mode
      8: Acquisition Check Mode
      9: Dark Frame Mode
      12: Flatfield Mode
    Functional Requirements
      15: Coordinate transformations
      16: Spectral bandwidth 350-1000nm
      17: Space for future dichroic slide
      19: Off-axis sensing <= 10 arcsec
      Relocation Requirements
        53: Relocation procedure
        54: Provision of relocation h/w
        55: Withstand shock loads
        56: Relocation time < 2 hours
    Performance Requirements
      46: FOV - FTT Mode: 3 arcsec
      47: Closed-loop b/w 10-40 Hz
      50: FOV - Acquisition Mode: 60 arcsec
      57: Environment for operation
      58: Environment for survival
      Dichroic Requirements
        59: Dichroic clear aperture >= 110mm
        60: Dichroic throughput >= 97%
        61: Dichroic diattenuation <= 1%
        62: Dichroic surface quality 60:40 or better
        63: Dichroic transmitted WFE <= 16.4nm
      65: TT residual
      66: Stability of zero pt
      Power Requirements
        67: Use electronics housing
        68: Surface temp close to beam within 2 C of ambient
        69: Total power consumption < 250 W
    Interface Requirements
      73: Provide list of ICDs
      74: Space envelope
  Derived Requirements
    Optics quality
    Overall image quality
      Image quality budget
    Stability budget
  Conceptual Design
    Camera choice
      Decision
    Camera cooling
    Pixel scale
    Optical concept(s)
    Optical layout(s)
      Simplest candidate layout using OAP
    Conceptual mechanical design
      What actuators
        Decision
    Optical design(s)
Not formally agreed with NMT yet!
Goal 1s
Respond to command from ISS to indicate correct initialization
Goal 100 arcsec
-5 < Tambient < +20 C (Goal -10 to +20 C)
10 < RH < 70% (Goal 10 to 90%)
-25 < Tambient < +40 C
5 < RH < 95%