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Noteworthy Projects

Development of ISKANDAR Network (ISKANDARnet) GPS Continuously Operating   Reference Station (e-Science Fund: RM 230,000; Completed; Project Leader)

Ministry of Science, Technology and Innovation (MOSTI) Research (2007-2010) : Development of ISKANDARnet [Project Leader]. A Continuously Operating Reference Station(CORS) to support research on Network-based Real-Time Kinematic (NRTK) & academic activities. My ISKANDARnet offers few services; (1) GPS RINEX raw data download service; (2) Single-base Real-Time Kinematic (RTK) service; (3) Network-RTK Virtual Reference Station (VRS) service; (4) Differential GPS (DGPS) service; (5) Post-process VRS service and (6) Ionospheric Outburst Monitoring and Alert System (IOMOS) service. This project is funded by Ministry of Science, Technology and Innovation (MOSTI) and the network is on-going to be expanded widely over Malaysia region which known as National Research CORS Network (NRC-net).

 

Pemantauan Kajian Kesiapsiagaan Dan Penyelengaraan Sistem ‘Differential Global Navigation Satellite System (DGNSS)(Contract Research: RM 1.12 Juta; Completed; Project Leader)

Geran Kontrak (2015-2017) : Pemantauan Kajian Kesiapsiagaan Dan Penyelengaraan Sistem ‘Differential Global Navigation Satellite System (DGNSS)  (2015 – 2017) [Ketua Projek]. Aktiviti penentududukan berketepatan tinggi seperti maritim, pengangkutan dan pengurusan memerlukan perkhidmatan navigasi yang tepat, berterusan dan boleh dipercayai. Pada masa kini, teknik pembezaan Sistem Kedudukan Global (DGPS; differential Global Positioning System) menggunakan stesen pemancar DGPS yang beroperasi secara berterusan sedang digunakan di seluruh dunia untuk menyokong aktiviti-aktiviti ini. Stesen pemancar DGPS beroperasi dengan menyebarkan isyarat data pembetulan jarak semu atau pseudorange correction (PRC) kepada (alat) pengguna DGPS seperti kapal-kapal dagang dan kepada pelaut di Malaysia.  Di Semenanjung Malaysia, terdapat empat (4) stesen pemancar DGPS yang dikenali sebagai Sistem Pelayaran Satelit (SISPELSAT) oleh Jabatan Laut Malaysia (JLM). Lokasi stesen-stesen pemancar ini ialah di Kuantan, Pahang; Banda Hilir, Melaka; Bagan Dato’, Perak dan Kuala Besar, Kelantan. Setiap stesen pemancar SISPELSAT mempunyai frekuensi tertentu (lihat Rajah 1) untuk menyebarkan isyarat data PRC kepada pengguna sistem ini, terutama untuk tujuan navigasi maritim di sekitar perairan Pantai Barat dan Pantai Timur di Semenanjung Malaysia. Walau bagaimanapun, keberkesanan pembetulan PRC ini akan berkurangan apabila pengguna sistem semakin berjauhan dengan stesen pemancar SISPLESAT. Ini kerana faktor atmosfera bumi yang berlainan di antara kedua-dua lokasi yang tidak berkolerasi. Akibatnya, ketepatan dan kejituan pengguna sistem adalah bergantung kepada jarak dari stesen pemancar SISPELSAT. Hasil kajian ini memberikan laporan ketepatan dan kejituan penentududukan DGPS berbantukan SISPLESAT. Kajian telah ditumpukan di Pantai Barat (Selat Melaka) dan Pantai Timur (Laut Cina Selatan) Semenanjung Malaysia.

 

Development of Prototype Near Real-Time GPS Meteorology System (Contract Research: RM 448,360.20; Ongoing; Project Leader)

MOSTI Research (2015-2017) : Development of Prototype Near Real-Time GPS Meteorology System (2015 – 2017) [Project Leader]. This project aims at establishment of near real-time monitoring of atmospheric water vapour using the ground-based GPS meteorology over Peninsular Malaysia. The benefit of near real-time monitoring of atmospheric water vapour will enhance precision meteorology and   support weather and climate prediction for Malaysia region. This project is a contract-research funded by Ministry of Science, Technology and Innovation (MOSTI). Further information on the project can be viewed through http://161.139.104.104/my-gpsmet-old/.

An Equatorial Ionosphere Index and Alert System for Space Weather Application (Contract Research: RM 280,500; Completed; Project Leader)

Contract Research by MOSTI (2015-2017) : Development of Prototype Near Real-Time GPS Meteorology System [Project Leader]. An equatorial ionosphere index and alert (EIXA) system has been developed in order to support of space weather studies and services in Malaysia. For this purpose, the total electron content (TEC) which is a parameter of interest in ionosphere, is assimilated as a remarkable parameter for deriving ionospheric perturbation index. This project will also be a part of Malaysia International Space Weather Initiative (ISWI) and supports the operational of National Space Weather Centre in providing alert and services to interest parties mainly government agencies, industries and academia. The contribution of this research will be beneficial for various applications such as telecommunication, satellite navigation & positioning and broadcasting systems. Further information on the project can be viewed through http://myiono.angkasa.gov.my/.

Development of GNSS and DGPS Integrity Monitoring System in Malaysia (Contract Research: RM 192,000; Completed; Project Member)

Contract Research by MOSTI (2013-2015) : Development of GNSS and DGPS Integrity Monitoring System in Malaysia [Research Member]. The performance requirements expected from the Global Navigation Satellite Systems (GNSS) are very high. With the technology upgrading of GPS and the comprehensively launches of other GNSS such as GLONASS and GALILEO, the positioning precision was greatly improved, but navigation system integrity doesn’t achieve the demand of user. Indeed, the integrity of the navigation system is more important than the precision. Hence, there is a need to authenticate the received signals to ensure the safety used in the country. Such authentication comes in the form of integrity monitoring system that will be able to detect anomalous transmissions of the satellite signal from time to time. This project intended to determine the reliable and quality navigation information on GNSS and marine DGPS SISPELSAT in Malaysia through the development of signal integrity monitoring system. The system will identify and extend the type of problems and disseminate to the local user. Further information on the project can be viewed through http://gnss-integrity.angkasa.gov.my/.

The Development of Brunei Fitted Geoid Calculator for Negara Brunei Darussalam)(International Grant Research: RM 15,000; Completed; Project Leader)

International Grant Research (2011-2012) : The Development of Brunei Fitted Geoid Calculator for Negara Brunei [Project Leader].The Survey Department of Brunei Darussalam has taken the initiative to enhance the achievable height accuracy and subsequently increase the synergy of land surveying activities through Height Modernisation System (HMS) of Brunei Darussalam. From this HMS project, a fitted geoid model for the area around Brunei Darussalam has been constructed from gravity data measured on land, sea (altimetry) and aircraft, recent GRACE satellite data, along with precise levelling and GPS observation data. Furthermore, the geoid is computed on a grid of 0.01° x 0.01° resolution (corresponding to roughly 1 km), which is corresponding to the most dense gravity spacing of the underlying gravity data. The area of computation is 3-6.5°N and 113.5-116°E, which implies a number of FFT transformations of 300 x 300 point grids (100% zero padding). As an extension from the previous successful project, a portal-based Geoid Calculator for Brunei Darussalam is suggested. This portal-based Geoid Calculator will enable precise calculation of a fitted geoid value at a point in any places within Brunei Darussalam whose latitude and longitude are specified. The portal-based Geoid Calculator was developed with the collaboration between Brunei Survey Department (BSD), KT Ryan Communications and Services and Universiti Teknologi Malaysia (UTM). The development of portal-based Geoid Calculator was completed in 2012.