Analysis of accuracy the InaCORS BIG online post-processing service
- PDF / 1,618,846 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 6 Downloads / 260 Views
ORIGINAL PAPER
Analysis of accuracy the InaCORS BIG online post-processing service Muchammad Masykur 1 Received: 23 March 2020 / Accepted: 24 September 2020 # Società Italiana di Fotogrammetria e Topografia (SIFET) 2020
Abstract Applications for control point topographic mapping are currently almost done by the GNSS observation method. One method provided by the Indonesia Geospatial Information Agency (BIG) is an online post-processing called InaCORS. This process is achieved by uploading GNSS observation data (RINEX) to the web http://nrtk.big.go.id/. With this method, using only 1 GNSS receiver, control points for mapping can be obtained, and the calculation processing does not require in-depth knowledge of baseline processing. The purpose of this research was to determine the accuracy of the online post-processing InaCORS method if it is used as a mapping control point with a baseline between 500 and 3500 m. The biggest difference in the results are at northing (N) = 0.028 m easting (E) = 0.060 m, and elevation (z) = 0.084 m. Keywords Continuously Operating Reference Stations (CORS) . Global Navigation Satellite System (GNSS) . GPS online processing
Introduction Traditionally, it was necessary to obtain positioning with GNSS using at least two receivers, and the collected data are processed for highly accurate positioning using the GNSS data processing software whether scientific or commercial. However, the usage of such software is also quite difficult because they generally require deep knowledge of the GNSS and experience in the processing and they mostly need a licensing fee (Ocalan 2016) and until recently, as a common way, carrier-phase-based differential GNSS method should be applied in order to make a positioning within centimeter-level of accuracy. However, this requires at least two GNSS receivers (at least one reference and one rover) and post-processing of the collected data with a proper GNSS data processing software. This procedure generally requires costly field operations besides further office work (Alkan et al. 2020). In order to obtain high accurate coordinates, it was necessary to use the relative positioning technique during the field observations and also to process data using commercial or license
* Muchammad Masykur [email protected] 1
Department of Geomatics Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia
processing software. This results in a relatively high cost and the difficulty of processing (El Shouny and Miky 2019). Several organizations have opened up the field for users to perform online GPS data processing. These online services are free of charge and with limitless usage. They can be divided into two main categories which are as follows: (a) relative positioning and (b) precise point positioning (PPP) services according to the processing solution type (El Shouny and Miky 2019). Ocalan (2016) and Jamieson and Gillins (2018) stated OPUS and AUSPOS use the relative positioning method, while CSRS-PPP, GAPS, and TrimbleRTX use the PPP method. The
Data Loading...
