Two different methodologies for geoid determination from ground and airborne gravity data

Details Two different methodologies for geoid determination from ground and airborne gravity data Two different methodologies for geoid determination from ground and airborne gravity data

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003geoji.155..914b&link_type=abstract

Geophysical Journal International, Volume 155, Issue 3, pp. 914-922.

Physics

3

Scientific paper

In this study, two methodologies are investigated for geoid determination from ground and airborne gravity data. These two methodologies depend on the downward continuation method used. The first is the inverse Poisson integral; the second is the normal free-air gradient. Each of the two methods requires different treatment of the terrain effects and in turn different approaches to determine the geoid. The two geoid solutions, from ground data, are compared with existing GPS/levelling benchmarks and it is found that the second method gives a better fit due to the bias introduced from the inverse Poisson integral. The same process was applied to the airborne data, but with additional processing, that is the filtering of the terrain effects to preserve the consistency of the data due to the filtering of the airborne data. A study on the effect of filtering was also carried out in this paper and it concluded that filtering the terrain effects has no impact on the geoid. In addition, the airborne data, filtered to three different cut-off frequencies, were used to compute the geoid to investigate the possibility of using the denser data, of lower accuracy, to determine a high-resolution geoid. Even though the data filtered to small cut-off frequency have poorer agreement with the ground data, the geoids computed from the different filtered data is the nearly the same.

Affiliated with

Also associated with

No associations

Rating

Two different methodologies for geoid determination from ground and airborne gravity data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Two different methodologies for geoid determination from ground and airborne gravity data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two different methodologies for geoid determination from ground and airborne gravity data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-879289