Description Data Details
In order to test the proposed tracking schemes real Intermediate Frequency (IF) data affected by equatorial scintillation have been used. The data has been collecting by exploiting a GNSS front-end based Universal Software Radio Peripheral (USRP) installed in Hanoi (21° 2' 0" N / 105° 51' 0" E), Vietnam. The equipment was set-up at the NAVIS Centre, Hanoi University of Science and Technology in collaboration with the European Joint Research Center based in Ispra, Italy and the NavSaS group of Politecnico di Torino/Istituto Superiore Mario Boella based in Turin, Italy. The installation includes an antenna AT1675-120W SEPCHOKE_MC with Spike Radome, and an Ettus Research USRP Model N200 front-end. Moreover, an external 10MHz Rubidium oscillator has been used to drive the front end in order to minimize the clock noise. Data were collected from February to September 2013 at 5 MSamples/sec in the L1/E1 band in a 20 minutes basis each day after sunset local time in order to catch the ionospheric disturbance peak. A general scheme is reported, respectively in Figure 1. Table 1 summarizes the data details.
Figure 1: Data collection overview
|Signal||GPSL1 / GalileoE1|
|Bit per sample||16|
|Sampling rate||5 MHz|