The sar3d processor is rewritten as a checked port of Multi_antenna_3D_clean_v1.ipynb:
NVRTC kernels, timing from the trace stamps, notebook parameter names and one cubic
SAR_VOXEL_M. It adds front, side, top and 3D views, drops gpr_cpp and the parity tools,
and the GUI speed now applies only while the socket speed is ignored.
The display threshold from 'add treshhold' (e113ef6) was meant for the
sar3d projections; the GPR heatmap goes back to full-range levels and
the constant moves into sar3d_plot_mixin.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>