CALIBRA WP500: Testing and Validation

The objectives of WP500 are related to test all algorithms designed in WP300 and implemented in WP400 within the URTKN, validating the mitigation algorithms by identifying possible necessary fine tuning and testing against ground truth. Case studies connected with commercial applications (like precise agriculture and offshore) were conducted in order to verify the achieved degree of improvement.

Several tests were performed under different conditions regarding data acquisition, positioning method and environment. Tests on precision agriculture were conducted in cooperation with associate partners from Agro Pastoril Campanelli. In order to deal with real field conditions, three receivers were installed in the tractor as one can see in Figure 10. Such infrastructure allowed performing several tests under occurrence of ionospheric scintillations. Figure 12 shows the experiments being carried in the field.


Figure 10: onboard infrastructure for tests on precise agriculture.


Figure 11: Experiment being carried in the field of precise agriculture.

In order to perform the survey experiment, a survey test area was deployed at the UNESP facilities in the city of Presidente Prudente. The aim of this RTK test area is to provide support to the CALIBRA project and also to make available an infrastructure for testing RTK equipment in different conditions and scenarios, including effects of ionospheric scintillation. The UNESP test area is composed of seven tracks, with peculiars conditions like partial obstructions and no obstructions. Coordinates of more than 70 points at the test area has determined with high accuracy. Figure 12 presents an overview of the test area.


Figure 12: UNESP Test Area.

Several other experiments were also carried out and the data are available for the partners in an appropriated FTP SERVER. One of them, very important is related with offshore testing. Figure 11 shows the vessel used in the experiments, which were carried out with the support of DOF Brazil. The data are also available to the partners in order to perform different approaches of data processing.


Figure 13: Vessel of DOF supporting the offshore experiment.