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Contents
Contents
A GUIDE FOR VLA SPECTRAL LINE OBSERVERS
Edition 9
Eric M. Wilcots, Elias Brinks, James Higdon
Contents
INTRODUCTION
SYSTEM SPECIFICATIONS
Receivers and IF System
The Local Oscillator Chain
The Correlator
Total Number of Channels
Some Advanced Spectral Line Topics
Creative Use Of The Spectral Line System
High Accuracy Spectral Line Polarization Observations
The Lag Spectrum, Gibbs Phenomenon and Hanning Smoothing
Continuum Observations in Line Mode
OBSERVATIONAL CONSIDERATIONS
Amplitude and Phase Calibration
Bandpass Calibration
Continuum Subtraction
Interference
Bandwidth and Time Smearing
Determining the Observing Frequency
Doppler tracking and
dopset
Velocity Definition
Summing Velocities
Velocity Rest Frame
Running
dopset
Setting the LO Chain:
loser
System Temperature Corrections
Changes In T
With Elevation (T
)
Contributions to T
From Strong Lines
REFERENCES
Bandwidth and Number of Channels
Normal Mode
On-line Hanning Smoothing Option
Interpreting Observe
About this document ...
Stephan Witz 2003-04-15
With Elevation (T
)