Fixing Drag Computation

[gomezzz]

Description

• Fixed bcinv computation (conversion from Earth radii was incorrect leading to too small values)
• More info when printing particles

Related Pull Requests

• 132

Resolved Issues

• [x] fixes #134

How Has This Been Tested?

Attached is a population of 126 objects that decayed with SGP4 between 2022-01 and 2022-06. In the previous code only one of these decayed. In the new version, 23 of them decay within 6 month and 55 of them within 1 year. Note that SGP4 decays are not a great ground truth , so this should be taken with a grain of salt.

Test data decay_test_all.csv

As a sanity check also ran full population for 10 000 iterations (a little > 1 day of simulation time), 8 decayed within that time but we should probably have a longer run as sanity check for this too.

EDIT: Ok, just ran for 3month with 16024 particles, 26 burned up in the first 3 months, seems reasonable. (also in line with SGP and Dario's numbers)

[FG-TUM]

@gomezzz I would suggest disabling the verification test for the time being since it will have to be overhauled in the MPI PR anyways.

[gomezzz]

@FG-TUM should we merge?