No audio available for this content. As high-precision GNSS horizontal and vertical data becomes less expensive to collect, greater attention must be paid when reconciling vertical datasets. In 2013, ...

In Part 1 of this series, I discussed the basic concepts of GNSS-derived heights; the article discussed the three types of heights involved in determining GNSS-derived orthometric heights: ellipsoid, ...

For years, researchers have tried to pinpoint how an area deep in the Indian Ocean with lower gravitational pull came to be. A team in India may have figured it out. The area in question is called the ...

It is found in the depths of Indian Ocean and named as the gravity hole or Indian Ocean geoid low, an anomaly on earth where gravity is said to be weaker, and levels of sea dip by more than 328 feet ...

Credit: International Centre for Global Earth Models (ICGEM) / E. S., Barthelmes, F., Reißland, S., Elger, Like all scientific mysteries, the Indian Ocean geoid low (IOGL) — also known as the Indian ...

Bottom line: There's a well-known "hole" in Earth's gravity field just off India's coastline, known as the Indian Ocean Geoid Low (IOGL). A new study is providing a potential explanation for this ...

Figure 1: Relationship between the geoid and seismic tomography. The best-fitting model (Fig. 2a) was found by a systematic parameter search (Supplementary Figs 1–5). The eastern hemisphere geoid low ...

Gravity field modeling and geoid determination are critical tasks in geodesy and Earth sciences, providing insights into the Earth’s mass distribution and its gravitational potential. Researchers ...