Pre-calculated library of FGF/TGF produced from a grid of altitudes (8-16 km) and radial distances (0-15 km)

# TGF FGF Atmospheric propagation Library (ALOFT context) | file | purpose | | -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------- | | `plot_simulated_spectra.m` | Bin raw photons from selected **altitude × radius** cells into 64 log‑spaced bins (500 – 32 000 keV) and save PNGs to `examples/`. | | `describe_TGF_library.m` | Print a compact inventory of the MAT‑file (field names, classes, sizes). | --- Calculated using the GEANT4-based code: https://doi.org/10.5281/zenodo.15024494 ## MAT‑file: `TGF_Library_20km_StartPhot_gaussian_30.mat` | field | size | note | | ------------------------- | -------------- | ----------------------------------------- | | `altitudes` | 1 × 10 double | source heights \[km] | | `r_bins` | 1 × 17 double | radial bins \[km] | | `e_bins` | 1 × 102 double | energy edges \[keV] | | `ener_lists` | 10 × 17 cell | raw photon energies (≈ 1 M each) | | `spec` | 10 × 17 cell | spectrum already binned on `e_bins` | | `NB_SAMPLED_INITIALLY` | 10 × 17 double | MC photons launched per cell | | `COUNTS_PER_CM2_FOR_1017` | 10 × 17 double | detector counts per 10¹⁷ source electrons | | `WANTED_STATS` | scalar double | target photon count threshold | --- ## Quick start ```matlab % spectra plot_simulated_spectra % PNGs appear in ./examples % inspect library describe_TGF_library ``` Tweak `ALTITUDES_TO_SHOW`, `R_BINS_TO_SHOW`, or `NBINS_PLOT` inside `plot_simulated_spectra.m` to explore other part of the parameter space.