PROGRAM: S-4

Title:

Abstract:

The use of GPS for positioning, surveying and mapping applications in Indonesia is systematically started at the end of 1980s. In this case, static surveying and real time (absolute and differential) positioning are the two most positioning modes being used. The GPS CORS in Indonesia were firstly established by the Indonesian National Coordinating Agency for Surveys and Mapping (Bakosurtanal) with three stations, i.e. in Cibinong (West Java), Medan (North Sumatra) and Parepare (South Sulawesi). In October 2009 the GPS CORS of Bakosurtanal consists of 51 continuously operating GPS reference stations. Several clusters of local GPS CORS have also been established by other governmental agencies and universities. GPS CORS prospect in Indonesia is very promising especially for maintaining the national spatial reference system to support various applications of positioning, surveying, and mapping, such as in land administration, mining and transportation sectors. Observing several natural hazard phenomena in Indonesia, e.g. earthquake, tsunami volcanic eruption, land subsidence, and landslide will also be greatly improved. GPS based mapping of tropospheric water vapor and ionospheric TEC over Indonesia region will also benefit from the enormous data provided by GPS CORS (Abidin et al., 2010). The current status of GPS CORS in Indonesia consists of 140 GPS stations operated by Geospatial Information Agency of Indonesia. By using RTCM format, the real time GNSS data can be accessed from every ware with available internet connection (Heo et. Al., 2009). The real time GNSS data can be used for differential GNSS positioning, real time ionospheric space weather monitoring as well as water vapor monitoring. By using goGPS Matlab toolbox (Herrera et. Al., 2016) we have developed the real time ionospheric estimation from GNSS carrier wave and pseudo range data which is streamed every second. The real time ionospheric data is very useful and have a potential for space weather activities caused by X ray solar flare and large tsunami waves.

Acknowledgements:

The authors acknowledge Arif Aditya of Geospatial Information of Indonesia for discussion about RTCM data.

References:

Herrera A.M., Suhandri H.F., Realini E., Reguzzoni M., de Lacy M.C. (2015) goGPS: open-source MATLAB software, GPS Solutions 20(3), 595-603, (DOI 10.1007/s10291-015-0469-x; ISSN 1080-5370).

Heo, Y., T. Yan, S. Lim, C. Rizos. (1996) International Standard GNSS Real-Time Data Formats and Protocols. International Global Navigation Satellite Systems Society IGNSS Symposium 2009, Holiday Inn Surfers Paradise, Qld, Australia.

Hasanuddin Z. Abidin, C. Subarya, B. Muslim, F.H. Adiyanto, I. Meilano, H. Andreas, and I. Gumilar. (2010) The Applications of GPS CORS in Indonesia: Status, Prospect and Limitation, FIG Congress, Facing the Challenges – Building the Capacity Sydney, Australia.