Contents

• Contents
• List of Figures
• List of Tables
• INTRODUCTION
• HARDWARE
  • Primary Mirror
  • Metering Structure
  • Spectrometer
    • Aperture Wheel Assembly
    • Diffraction Grating
    • Calibration Lamp
    • Vacuum Pumps
  • Detector
  • Acquisition TV Camera
• OPERATIONS
  • Overview
  • HUT Operations
    • The Command Interface
    • Downlink Data Formats
    • DEP Operational Modes
  • Target Acquisition and Pointing Control
    • Automated Acquisitions with the IPS
    • Manual Target Acquisition
    • Manual Pointing Control
    • Lock on Target
    • Sensor Substitution
  • POCC Operations
    • POCC Capabilities
    • POCC Positions and Schedule
• CALIBRATION
  • Wavelength Calibration and Image Motion Corrections
  • Pulse Persistence
  • Dead Time
  • Dark Count
  • Scattered Light
  • Second-order Light
  • Flat Fields
  • Flux Calibration
  • Photometric Corrections for Image Motion
• OBSERVATION FEASIBILITY ESTIMATES
• MISSION PLANNING
  • Selecting Targets for a Given Launch Assumption
  • Detailed Observation Planning
    • Sequence Database Files
    • Coordinates and Roll Angles
    • Selecting HUT Guide Stars
    • Count Rates and Door States