Study of Single Network Adjustment Using QOCA Software in Korea

For this study, this researcher conducted a precision network adjustment with QOCA, the precision network adjustment software developed by Jet Propulsion Laboratory, to perform an integrated network adjustment on the Unified Control Points managed by the National Geographic Information Institute. Towards this end, 275 Unified Control Points observed in 2008 were selected before a network adjustment is performed on those 275 Unified Control Points. The RMSE on the discrepancies of coordinates as compared to the results of GLOBK was ±6.07mm along the N axis, ±2.68mm along the E axis and ±6.49mm along the U axis.

Authors:

• Seongchan Kang
• Hongsik Yun
• Hyukgil Kim
• Minwoo Park

Keywords:

• Network adjustment
• QOCA
• unified control point.

References:

[1] Huang He (2009) Accuracy Analysis of Latest Satellite Gravity Field
Model using Unified Control Point Survey Results, Korea Society of
Civil Engineers.
[2] Dong. D. (1998) Estimating regional deformation from a combination of
space and terrestrial geodetic data, journal of Geodesy.
[3] Jet Propulsion Laboratory (2010), Introduction to GIPSY Software,
California Institute of Technology.