Wednesday, July 17, 2019

Bacaan Geoid Indonesia


Usaha untuk menerbitkan geoid baru bagi Indonesia sedang rancak berjalan. Untuk mengetahui perkembangan kajian tentang geoid di Indonesia ada beberapa sumber bacaan yang boleh membantu.

"Geoid of Jakarta" Dadan Ramdani et al (2015) BIG - 6 pages.

"Updating model geoid Indonesia" Pahlevi, Dyah Pangastuti, et al. BIG - 10 pages.

"Study of satellite gravity over the Sumatran earthquake region"  Bhattacharrya et. al - 7 pages.

"Geoid after the eruption of Merapi in 2010" UGM and Semarang - 6 pages.

"Combination of gravity disturbances and gravity anomalies for geoid determination: a case study in Semarang City, Central Java" Heliani et al (2018) IEEE paper.

"Precise Indonesian gravity fields determination from combination of surface gravity, altimeter and DTM data" Heliani and Fukuda Kyoto - 6 pages

"Estimation of marine gravity anomaly model from satellite altimetry data (case study: Kalimantan and Sulawesi Waters-Indonesia" Pangastuti, Pahlevi & Hwang (2018)

"Permodelan geoid kota Surabaya ..." Tesis ITS, 2017



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Wednesday, July 10, 2019

Height Network and Geodynamic Effects

Height network is one of important geodetic infrastructures needed in any country. The normal practice of establishing height network is by levelling network which requires bench marks been placed at suitable locations.  A good practice of keeping the bench marks height up-to-date requires the network been measured repeatedly at appropriate time interval. Another consideration is to look at the effect of geodynamics to such height network.

In order to understand how the geodynamic factors impacted levelling network lets review the following articles;

“Impacts of geodynamic phenomena on systems for height and gravity” Martin Ekman, Bull Geod 63, 1989. 16 pages.

“Geodynamical studies using gravimetry and levelling” PhD Dissertation, Jaakko Makinen 2000, U of Helsinki, 18 pages.

“To determination of the heights on geodynamic and technogenic polygons” Lviv Uni Ukraine, Geodesy and Cartography, Vol 44, No 2, 2018.

Another interesting readings;

“On the use of repeat levelling for the determination of vertical land motion: artifacts, aliasing,  and extrapolation errors” Featherstone, Filmer – JGR Solid Earth 2018 (link)

“Vertical crustal movements based on precise levelling data in Estonia” Tarmo Kall, PhD thesis, Tartu Uni 2016, 236 pages – (link)

“Towards worldwide height system unification using ocean information” Woodworth, Hughes, Bingham & Gruber, J of GS, 2(4) 2012 – 17 pages.

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Monday, July 8, 2019

IUGG General Assembly


Montreal July 2019


July 8 to 18, 2019
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Friday, July 5, 2019

Annual Report – GGE UNB


In the past many surveying department at prominent universities published their technical report as promotion means. One example is the report by SE Dept of UNB Canada (which later renamed as GGE Dept). Shown below are some of the report received from GGE Dept, UNB.

Note: Dept Chair 1989/90 – JD McLaughlin; 1993-1994 Adam Chrzanowski; 1995 – Alfred Kleusberg; 1996-1997 David Coleman.

UNB GGE Dept Report

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Tuesday, July 2, 2019

Stuttgart Uni Geodesy Dept Annual Report


Also available is the report of the Geodesy Department, Stuttgart University.

Report Year 1996 and 1999

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