The history of this tool also starts at Geoscience Australia.
The aim in creating this tool was to capture all the requirements for a large national geologyical survey when it comes to both land and marine gravity. With well over 1 million stations, collected over 50 years and with many different instruments and operators, the task of managing, publishing, doing reductions to defendable representations of the local gravity field anomalies, is quite a task.
So, a 16 step workflow developed to create a framework to check and re-process observed land based gravity.
One or many meters and one or more operators are expected, with each combination of meter and operator pushed into a measuring "combination". This is in recognition of different people geting different quality levels of readings friom the same meter. A method to do meter drift corrections, estimate operator and meter errors at all stages evolved, with a carry over to the final 16th stage of the "Princial Facts" having a error calculated for every station.
Intrepid has the policy of accepting gravity jobs and finding solutions for gravity related problems. These generally find their way into each next release of the commercial software.
With the moving platform gravity acquisition systems, much progress has been made in the last 20 years.
Once again, Intrepid software copes with all the standard workflows required for commercially acquired surveys.
One of the current R&D projects includes working on under-water gravity gradiometry.
As the topography plays a very considerable role in all aspects of gravity anomaly interpretations, Intrepid also does training for those wishing to improve their knowledge and understanding of these interactions.
It is only by fully taking this topography effect into account that any buried gravity anomalies can be clearly delineated.
Do you know if it would be possible in a future version of the Intrepid Geophysics software, to add the CH1903_LV03 reference system at the list of Projected Coordinate System that can be used in the software?
Intrepid already supports the datum CH1903 / LV03 - the locations of your gravity observations and your DTM will be treated correctly by the gravity tool. The GRAVITY DATUM that you can choose (e.g. POTSDAM, WGS84, etc) mainly deals with the gravity formula that is used to calculate the theoretical gravity, atmospheric correction and the free air correction.
For instance, the POTSDAM gravity datum uses truncated Chebychev polynomials to calculate the theoretical gravity of the ellipsoid, whereas the WGS84 datum uses Somigliana's closed formula for the normal gravity and the WGS84 ellipsoid definition. Please refer to the gravity manual for further details.