Abstract
Most of the studies land subsidence and impact have been done on the north coastal area of Java, especially Semarang and Demak. This landsubsidence has a very serious impact both in the infra structure, the economy and the environment. Techniques of observing landsubsidence using geodetic methods have been widely practiced. Geodetic technology is undergoing rapid development, especially in GNSS navigation satellite technology as well as satellite radar interferometry. Both have advantages and disadvantages of each. In this study will examine the application of DinSAR interferometric techniques and GNSS technology to predict the rate of land subsidence coastal of Demak regency. This paper also emphasize the role of GNSS and DinSAR application in deformation especially for landsubsidence monitoring.
Highlights
Coastal area in Sayung Demak is a very dynamic and have sufficient resource potential big, coastal areas are areas that are very vulnerable to hazards such as flood and inundation land subsidence
SAR refers to the concept of RADAR using an active sensor that sends radio signals with pulses that bounce off the ground and move back to the sensor
Since this phase is a measure of distance, this, in theory, represents a change in the height of a point reflected by a signal [3].The problem of SAR image processing became more complex
Summary
Coastal area in Sayung Demak is a very dynamic and have sufficient resource potential big, coastal areas are areas that are very vulnerable to hazards such as flood and inundation land subsidence. The most effective way of monitoring ground subsidence can be conducted using dInSAR, GNSS and levelling is to first screen large areas for any movement using dInSAR.[2] The principle of interferometry is to calculate phase differences between SAR images obtained at different times. Since this phase is a measure of distance, this, in theory, represents a change in the height of a point reflected by a signal [3].The problem of SAR image processing became more complex. The source of phase error in SAR interferomteri is as follows, Impact of atmospheric change,The impact of orbital inconsistencies, multipath and Topography
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
