This is a project which is currently making use of HPC facilities at Newcastle University. It is active.
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The Global Positioning System (GPS) allows us to measure the changing shape of the Earth's surface with high accuracy. These changes reflect multiple processes operating both within the Earth and at the surface. Using continuously recording GPS instruments in the Antarctic Peninsula, we study the response of the solid Earth to seasonal and annual variations in snow and ice accumulation over the past decade.
We process Antarctic Global Positioning System (GPS) data in conjunction with a global network that incorporates all available data from the International GNSS Service (IGS), as well as the US POLENET-ANET and UKANET networks. To manage computation, stations are divided into subnetworks and processed using the GAMIT ("GNSS at MIT") software. Processing is executed in parallel on a per-day, per-subnetwork basis, with data dispatched to available computing nodes. After all subnetwork-day datasets are processed, the results are combined using a Kalman filter to produce final position solutions.
GAMIT/GLOBK is a collection of programs designed to process GPS phase data to estimate three-dimensional relative positions of ground stations, satellite orbits, atmospheric zenith delays, and Earth orientation parameters. The software runs on any UNIX-based system. Installation requires a basic Unix or Linux operating system plus four essential components:
- a Fortran compiler;
- a C compiler;
- X11 libraries (e.g., libX11.a, libX11.so, libX11.dylib, libX11.la, or libX11.dll.a); and
- X11 header files (e.g., Xlib.h).
Post-processing and output management are handled using Python scripts in combination with the Generic Mapping Tools (GMT) software.