The goal this research is to investigate the use RTK heave as a - - PowerPoint PPT Presentation

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The goal this research is to investigate the use RTK heave as a - - PowerPoint PPT Presentation

Mar 29, 2023 324 likes •647 views

The goal this research is to investigate the use RTK heave as a replacement of MRU heave Heave is a major contributor to errors in depth measurements. Heave is a major contributor to errors in depth measurements. In the past, manual or automatic

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The goal this research is to investigate the use RTK heave as a replacement of MRU heave

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Heave is a major contributor to errors in depth measurements.

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Heave is a major contributor to errors in depth measurements.

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In the past, manual or automatic smoothing of the data was the only practical way of partially correcting wave-induced errors.

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The MRU accuracy in Heave is : +/- 5 cm

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Rover Base The RTK vertical accuracy: +/- 1 cm

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MRU heave may suffer from drift due to turn or acceleration

Why

Testing the new method of measuring heave

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sampling rate of MRU is higher than RTK  RTK may suffer from outage due to bad communication, could be overcome by PPK

Remember

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R2Snoic MBES project

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R2Snoic MBES project: Three surveying lines Total length of 2 km Average depth: 15 m

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applying

correction s

reading parameters raw data review (Phase I) swath-based editing (Phase II) area-based editing (Phase III)

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Two ways of processing:

Heave MRU Tide RTK Heave RTK Tide RTK

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Two ways of processing:

Heave MRU Tide RTK

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Two ways of processing:

Heave RTK Tide RTK

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applying corrections reading parameters raw data review (Phase I) swath-based editing (Phase II) area-based editing (Phase III)

Heave based comparison Area based comparison

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Hm and Hr plot for the first survey line of R2Sonic project

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Hm and Hr plot for the second survey line of R2Sonic project

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Hm and Hr plot for the third survey line of R2Sonic project

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Hm and Hr correlation for the first survey line of R2Sonic project

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Hm and Hr correlation for the second survey line of R2Sonic project

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Hm and Hr correlation for the third survey line of R2Sonic project

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Standard Deviation between Hm and Hr for the three lines

Line Standard Deviation (m) 1 0.02 2 0.03 3 0.02

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applying corrections reading parameters raw data review (Phase I) swath-based editing (Phase II) area-based editing (Phase III)

Area based comparison

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Soundings profile for two surfaces Sm and Sr

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0.006 and the standard deviation is 0.218

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there are high correlation between both Hm and Hr . In other words RTK heave could be used as a replacement of MRU heave

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Appling the same test on single beam echo sounder Appling the same test in rough seas to see how the RTK heave will follow the MRU heave

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  • Dr. Mohamed Mohasseb

Hassan Halwanee Mohamed Elmelegy Tamer Nada Ahmed Naguib Egyptian Navy. Dr.Ashraf Elasal Pat Sanders

  • Prof. Dr. Saad Mesbah

Hydrographic Survey Research Group

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