Hello again,
I have reviewed the sign convention information for the forward gravity operator in SimPEG. I have a few doubts I was hoping someone could solve.

If the sign convention for the forward operator differs, how are we supposed to use the inversion codes for actual data, where the positive density anomalies create gravity highs?

In Dr Astic’s 2021 paper, as well as the PGI tutorial (Joint PGI of Gravity + Magnetic on an Octree mesh using full petrophysical information — SimPEG 0.19.0 documentation), the gravity anomaly is a gravity low, and the inverted density model consists of a negative density contrast, which follows the general convention, but goes against the positiveZ up convention given as an explanation in this topic (Simulation: Gravity Anomaly Data on Tensor Mesh  #2 by thibaut.astic). How should one achieve the results in Dr Astic’s paper and the example in the above link (as a positive density contrast makes sense for the Kimberlite pipe anomaly, given the convention used in SimPEG)?
Please let me know; I appreciate any help that I can get.
Thanks and regards
Akshay