1. Tools for Finding Problems in the Data or Processing

2. Topics to be covered Postfit editing Sky plots of residuals
CVIEW interactive data viewer
Common failure modes
30-Dec-18
GAMIT/GLOBK Tutorial 6

3. Skyplots To make them Check that GMT software is installed
Include following command in autcln.cmd
POST phs_res_root DPH
Will create DPH files
Examples:
HOLC in California
Results from /dell3/tah/glob99 using display
30-Dec-18
GAMIT/GLOBK Tutorial 6

4. HOLC skyplots
30-Dec-18
GAMIT/GLOBK Tutorial 6

5. CVIEW an interactive viewer of GPS data
allows editing and cycle slip repair
seldom used now
autcln works well on most data
useful for diagnosis when autcln fails
example use of cview
To retain C-files to read with cview, use -e option in sh_gamit.
Examine /dell3/tah/iap02/013r
30-Dec-18
GAMIT/GLOBK Tutorial 6

6. Failures Reported in the GAMIT.fatal files
Most common modes of failure
setup errors
receiver and antenna information
bad apriori coordinates
tables out of range
Examples
fatal errors in yesterday's tutorial
30-Dec-18
GAMIT/GLOBK Tutorial 6

7. Summary Examine sky plots phase residuals help evaluate quality
Examine GAMIT.fatal
diagnose upstream problems
30-Dec-18
GAMIT/GLOBK Tutorial 6