53 CHC i83 User Manual
• Have short, high-quality low-loss coaxial antenna cables with dielectric filled connectors.
• Enjoy top of the line GNSS receivers with the latest firmware.
Stuff happens and some of the CORS stations are unreliable, and a few are horrible. No matter how bad a station might
be, NGS CORS will collect the bad data, and the OPUS engine will use the bad data and then blame your occupation for
all issues.
The only effective control that a user has is the ‘Exclude’ box under ‘Options’:
But how can you figure out if a CORS station should be excluded?
This is a great question. The best way is to click on the ‘Time Series (short term)’ button. Here is an example of a great
station:
Time Series for P113
You also want to look at the recent ‘Data Availability’:
Availability for P113
The position trends are very stable and are within 1 cm horizontal and vertical of the published IGS08 positions. The
average locations and all the error bars are fully contained in the green error bands. Coupled with continuous recent
Data Availability this station appears to be a great CORS resource.
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