Modelling of precise hybrid geoid in Perlis region / Muhammad ‘Izzat Ramli

The investigate were about the height come from the geoid surface where called as geoidal height (N), which is in Malaysia have several geoid model where have computed, for example Mygeoid, PMGG2020, and more, where have used by the surveyor in every state in Malaysia especially in study area Perlis region. However, height in Malaysia have refer to the Mean Sea Level (MSL) where refer to the Port Kelang, called as Orthometric Height (H). So that, the modelling of precise hybrid geoid in Perlis region using geometric geoid from Global Navigation Satellite System (GNSS) observation will be perform ensure the height getting from GNSS can be concise with MSL in Malaysia. So that, to get the good modelling of precise hybrid model in Perlis region, the three gravimetric have tested and get the RMSE for the accuracy for every type of gravimetric geoid. After that, the good geoid will be selected and integrate with land levelling datum using the best parameter and method. So that, from the RMSE calculation, the good gravimetric geoid have founded, back up by the quadratic calculation and get the best and good gravimetric model for Perlis region was PMGG2020 with0.1023m. After that, that gravimetric proceed with integrate. In conclusion, this study have produce the hybrid geoid model where will helped the surveyor in Perlis region to get the good geoid value to calculate the value of H for practitioners.