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Tools for Finding Problems in the Data or Processing

Tools for Finding Problems in the Data or Processing. Topics to be covered. Postfit editing Sky plots of residuals CVIEW interactive data viewer Common failure modes. Skyplots. To make them Check that GMT software is installed Include following command in autcln.cmd

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Tools for Finding Problems in the Data or Processing

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  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 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 GAMIT/GLOBK Tutorial 6

  4. HOLC skyplots 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 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 GAMIT/GLOBK Tutorial 6

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

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