Using the Westerbork Synthesis Telescope as a Tied array

• Introduction to the use of the Tied Array
• Operating the tied array
  • Setting up the Tied Aray
    • DCB Total powers
    • Phase zero values
    • Delay offsets
    • Amplitudes
    • Spacings
  • How to we calibrate the tied-array?
    • Known sensitivity
    • Known system temperatures
    • Accurately phased array
    • Total Power of added signals
  • What is not understood about the tied array 21 August 1996
    • Tied array losses in DCB
    • Phase and delay differences between DCB bands
    • Phase steps in the RFDS
    • Phase and delay differences between different sidebands of DCB
    • Total powers from ASTI
    • Terminations from the ASTI
    • What causes 'SYNC ERRORS' ?
    • Does the tied-array move when telescopes do?
    • Are there effects from 3ns delay steps
    • How much delay do we have in the cables and backend?
• VLBI and Tied array
  • What is VLBI?
  • What is needed for VLBI to work?
    • Same source
    • Same time
    • Same frequency
    • Same polarization(s)
  • Guidelines for the use of the WSRT in VLBI
  • VLBI Schedules
    • Block Schedule
    • Making schedules
      • PC-SCHED
    • Schedule transfer
    • Checking Schedules
    • Transfer to field system and telescope control computer
    • Running the schedule
  • VLBI specific Setup procedures
    • Mk3 equipment total powers
    • Default observations
    • VLBI Checklists
• Observing Pulsars with the Flexibile Filter Bank
  • General
  • WSRT Filterbank Back-End Overview
    • Field of View
    • Sky Frequency
    • Number of Channels
    • Bandwidth
    • DC Removal
    • Smoothing
    • Sampling
    • Timing
    • Digitizing
    • Sensitivity
    • Recording Space
    • Maximum Recording Time
• Long Spectra (WADDS)
  • General
  • Hardware Setups
  • Hardware devices used
  • Correlator Configurations
• Mk3 standard setups
  • Mark 3 modes and their track assignments
  • Standard Sky Frequencies
    • 18cm
    • 6cm
    • 21cm (EVN standard)
    • 92cm
    • 49cm (nonstandard)
    • 3.6/13cm ("S/X" band)
• SNAP commands
  • Minimum SNAP commands
  • Other useful SNAP commands
• Default settings for tied-array VLBI
  • General
  • Dipoles
  • Control codes
  • Other codes
  • Mk3 Mixing scheme
    • General
    • Polarization
    • Video Converter settings
  • Different wavebands
• Tied-array setups per wavelength
  • 6cm
  • 18cm
  • 92cm
• WSRT Mixing schemes
  • General
  • Equations
• Checklists for a VLBI session
  • One Week before (for VLBI friend)
  • Two days before (for VLBI friend)
  • During Observations (for Waarnemers)
    • Taking over a shift
    • Checks during a shift
    • Checks before going to sleep
  • Checks after VLBI session (for VLBI friend)
• ASTI Total Power setup
• The VLBINFO account
• Instraal test
• WADDS checklist
• Concepts Index

This document was generated using the texi2html translator version 1.36.