RTCM 3.1 Transformation Messages In RTK GNSS Networks

As concerns the use of RTCM observation correction data in GNSS positioning services, the coordinates are resulting within the ITRF or in a regional ITRF-realization (e.g. ETRF89) as geocentric (x,y,z) or ellipsoidal (B,L,h) coordinates. The users of GNSS services must however normally present their results in the coordinates of regional or local horizontal and vertical datum systems. Therefore, coordinate transformations are necessary. Currently, the pre-calculated transformation parameters and/or geoid-models have to be transferred in advance to GNSS controllers in particular ways. Such are the transfer of transformation parameter databases with a direct access on the GNSS-controllers, or the mapping of a desired reference transformation and/or geoid into a discrete so-called grid and its transfer to the GNSS-controller by the user. The aim of the transformation messages of the recent 2007 RTCM 3.1, and so that of the RTCM working group (composed of representatives of GNSS industr...

2009

As concerns the use of RTCM observation correction data in GNSS positioning services, the coordinates are resulting within the ITRF or in a regional ITRF-realization (e.g. ETRF89 in Europe) as geocentric (x,y,z) or ellipsoidal (ϕ,λ ,h) coordinates. The users of GNSS services must however normally present their results in the coordinates of regional or local horizontal and vertical datum systems. Therefore, coordinate transformations are necessary.

Research Journal of Agricultural Science, 2013

In this article, the authors present some of the new facilities offered by GPS technology producers in RTK (Real Time Kinematic) measurements. This facilities give to the users more flexibility and implicit more efficiency in the field measurements. In the article, are presented especially the practical consequences of the mutual radio communication facilities: rover-base and base-rover. In this article, the authors present some of the new facilities offered by GPS technology producers in RTK (Real Time Kinematic) measurements. This facilities give to the users more flexibility and implicit more efficiency in the field measurements. In the article, are presented especially the practical consequences of the mutual radio communication facilities: rover-base and base-rover. Specific RTK GPS measurements with impressive efficiency. Thus, GPS users will not stay in the point which planimetric and altimetric desired position than is strictly necessary time. Can be 10, 20 seconds or can be...

Journal of Global Positioning Systems, 2004

2000

Journal of Global Positioning Systems, 2002

This is quite appealing, since in areas with considerable GPS surveying activity, a number of users might share the infrastructure and the associated costs. Some of the installa- tions are operated by companies and provide a service to the surveying community. Installations can be just single reference stations, a number of single reference stations, or networking reference stations. A single reference station set-up within up to 20-30 km is typically required if a user is operating in baseline mode. Otherwise the performance, accuracy, and with some systems the reliability of user's RTK is degraded. The integration of several reference stations into a com- bined network provides benefits for the user by improving the accuracy and increasing the overall user system perfor- mance. For the reference station operator, networking reduces the number of stations that are needed to provide a given level of accuracy to the rover users. These perma- nent reference station networks are r...

The concept of Real Time Kinematic (RTK) Network has become popular throughout the world since the beginning of 2000s. The RTK Network server collects satellite observations from the RTK Network, performs calculations and sends RTK corrections to the rover. Thus, these RTK Networks eliminates the need for post-processing GPS observations; instead the users in the field instantaneously obtain the receiver antenna's three dimensional coordinates with cm accuracy. This paper details the infrastructure of the Turkish RTK CORS Network called TUSAGA-Aktif established by Istanbul Kultur University in association with the General Directorate of Land Registration and Cadastre and the general command of mapping and sponsored by the Turkish Scientific and Technical Research Agency (TUBITAK). The network constitutes 146 Continuously Operating Reference Stations controlled by the two control stations, the Master Control Station at the Photogrammetry and Geodesy Administration of the general ...

2009

The land surveying community is about to enter a new era of control surveying. Traditional methods of Global Positioning System (GPS) static and single base Real Time Kinematic (RTK) control surveying found in most surveying and engineering projects, the recent integrated networks of reference stations interpolating corrections for the point of survey replacing the local base station. Rather than using densely spaced “permanent” or passive physical monumentation, now get the three dimensions controls from much sparser physical networks and establishing site coordinates utilizing the Continuously Operating Reference Station (CORS) system as truth. Providing professional surveying services in support of many of New York City’s major engineering department projects has provided a base of experience will be described and analyzed to demonstrate the great potential of the networked RTK as a powerful control surveying tool. The Queens’s drainage system, New York State Department of Design...

– It shows how the mars rover communicates back to the earth. It includes a virtual Mars station and a virtual Earth station. The Mars rover captures an image and sends it to the virtual Mars station. Now the image is converted into a suitable signal so that it is transmitted to an orbiting satellite. This satellite sends the signal to the virtual earth station. It is converted to the original image on the virtual earth station. This signal is sent to another orbiting satellite if in case the communication with the first satellite fails.