Abstract Details
| Name: Dr Parvaiz Ahmad Khan Affiliation: Department of Electronics and communication Engineering Islamic University of Science and Technology Conference ID: ASI2016_415 Title : The variability of the GPS positional error during quiet and disturbed geomagnetic conditions Authors and Co-Authors : Ritesh Yadav A.K. Gwal Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : The ionosphere, which is considered to be heterogeneous, is the main source of signal transfer medium, which brings about the possibility of radio communication over large distances by making use of one or more ionospheric reflection. Therefore estimating the ionospheric conditions in the real time would be of great use to communication and navigation system operators, since ionospheric disturbance can adversely affect radio propagation through attenuation, fading, absorption, noise, or signal velocity change. Due to such changes the navigation system miscalculates the distance of the signal path, creating navigational error. In the present study we have studied the behaviour of the positional error during geomagnetically quiet and disturbed conditions. In our investigation we have used the data collected at a high latitude Indian station, Maitri (70.4° N, 11.4° E), Antarctica during the low solar activity period i.e. 2006. We then selected five most disturbed days as well as five quiet days of the month. For each disturbed and quiet day we calculated the absolute positional error in meters. The dilution of precession parameters namely PDOP were also derived for each day. We found that the value of absolute positional error and PDOP is significantly increased during the disturbed days. |