PARTICLE PHYSICS AND ASTRONOMY RESEARCH COUNCIL MTPPN /2.1
JOINT ASTRONOMY CENTRE

James Clerk Maxwell Telescope

JCMT Pointing Project Note 2.1

Inclinometry : The New System and First Epoch Results

• Contents
• Introduction
• The need for Inclinometry at JCMT
  • The need for a new Inclinometry System
• Hardware
  • Manufacturer's Specifications
  • Initial Tests
  • Placement : Problems and Selection
• The Standard Configuration
• Data Acquisition and Strategies
  • The INCLINE task
    • Acquiring Point-Wise Data
    • Acquiring Continuous Data
    • Data recording with the antenna stationary
• Data Analysis
• Measurements - September 1994
  • Stability and temperature effects
  • Calibration
  • Configurations and ad-lib processing
• Point-wise Data
  • Settle_time and Sample_time
    • Note on Removing Linear Baselines
  • Repeatability and Hysteresis
  • Symmetry
  • A-frame Roll and TMU Roll
  • Mixed Resolutions
• Continuous Data
  • Repeatability and Hysteresis
  • Elevation effects
• Point-Wise -vs- Continuous
• Implications for the Construction of a Track Model
• The September Dataset
• Conclusions
• Figures & Captions
• About this document ...