Overview | Earthquake | Drought | Fire | Flood & Cyclones | Landslide & Soil Erosion | Volcano
Some Recent Results from GPS Studies for the January 2001 Bhuj Earthquake
Four Trimble 4000SSI and two Trimble 5700 dual frequency geodetic GPS receivers were used with the chock ring and Zephyr type of antennas respectively for this field work. The GPS data were organized into 24 hours segments with the combination of data from some of the surrounding IGS sites, namely IISC, BAHR, MALI, LHAS. to constrain the site co-ordinates. Coordinates for each IGS site for each year were calculated with the help co-ordinates and velocities in corresponding directions available in the year 2000 in Indian Terrestrial Reference Frame (ITRF).  Fig. 1 Location and Network of GPS Stations for 2003 Epoch
Data Processing with Bernese, Analysis and Results The data for each epoch is processed with the scientific software Bernese 4.2, developed by the University of Bern. Network considered for the different campaign for the year 2003 with the reference to their Northing and Easting is shown graphically by figure 1. After processing with the Bernese, out put file gives the position of the stations in terms of X, Y, Z and also in form of Height, Latitude and Longitude. Deviation in northing, easting and height separately for each GPS station was calculated by converting from latitude and longitude. This is graphically represented in figure 2 (A) and (B), which shows that most of the stations are moving in the North-East direction.
*** Inconsistent result, being analysed. --- RAPS station was not established in 2001 epoch so there is no data for the year 2001. |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||