QueenPeppa/messiahmaybe-external-holdout

MessiahMaybe cross-provider holdout sets

External test sets for the MessiahMaybe EarthCARE-trained physics-informed network for mixed-phase cloud supercooled liquid fraction (SLF = q_l / (q_l + q_i)). None of these rows come from EarthCARE, so they test generalization across instrument, retrieval algorithm, period, and region rather than leakage-prone random-row splits.

All rows pass the same filters as the EarthCARE training table: finite z, T, P, q_l, q_i; q_l, q_i >= 0; q_total > 1e-12; 233.15 K < T < 273.15 K; 750 m <= z <= 20 km.

Columns

Column	Units	Meaning
time	UTC	observation time
z	m	bin / layer height
T, P	K, Pa	temperature, pressure
q_l, q_i, q_total	kg/kg	liquid, ice, total condensate mixing ratio
slf	-	q_l / q_total
q_v	kg/kg	specific humidity
lat, lon	deg	location
w	m/s	0 (not observed; matches the MessiahMaybe NaN policy)
sza	deg	solar zenith angle
lat_band, season, month	-	stratification tags
granule, provider-specific tags	-	see each provider below

Each config folder also contains holdout.npz (the exact collocation / labeled arrays for pinn_architecture.load_filtered_splits(dir, split="holdout")) and catalog.json.

Providers

ceres_ssf

CERES SSF Aqua-FM3-MODIS Edition4A (statistical check; MODIS cloud properties). One row per footprint cloud layer. SLF = f_liq·LWP / (f_liq·LWP + (1-f_liq)·IWP) with f_liq = 2 - mean phase; q_total is derived from water path and hypsometric layer thickness; q_v from ERA5 at the layer effective pressure (see qv_source). Use for binned SLF(T) statistics, not per-row accuracy.

• Rows: 3,585,418
• Time coverage: 2018-01-23T00:00:01.332843264 to 2022-02-22T00:59:59.708336640
• Granules: 50
• Rows per latitude band: 30N-60N: 670,893, 30S-30N: 678,133, 60N-90N: 695,863, 60S-30S: 826,989, 90S-60S: 713,540
• Caveats:
  • Daytime MODIS retrievals; one row per cloud layer, not per vertical bin.
  • SLF is a layer/column mass ratio and q_total is thickness-derived: use for binned statistics only.
  • q_v from ERA5 at the layer effective pressure (or liquid saturation if qv_source=saturation).
• Cite:
  • Minnis, P., et al. (2021), CERES MODIS cloud product retrievals for Edition 4, IEEE TGRS, doi:10.1109/TGRS.2020.3008866
  • NASA/LARC/SD/ASDC, CERES SSF Aqua-FM3-MODIS Edition4A, doi:10.5067/AQUA/CERES/SSF-FM3_L2.004A

EarthCARE ACM-CAP, 80°S–80°N

Rebuilt from ESA MAAP ACM_CAP_2B, 2024-08-01 to 2026-08-01, bounding box 80°S–80°N. One frame per month and UTC hour (576 frames). Baseline BA frames take temperature, pressure, and specific humidity from AUX_MET_1D rebinned onto ACM-CAP.

Filters: finite z, T, P, q_l, q_i; q_l and q_i non-negative; q_total > 1e-12; 233.15 K < T < 273.15 K; 750 m <= z <= 20 km; -80 <= latitude <= 80. Missing Doppler velocity is kept.

• Rows: 23,691,644
• Latitude: -79.9999 to 79.9999
• Row split, seed 42, 70/15/15: train 16,584,150, val 3,553,746, test 3,553,748
• Files under earthcare_80s80n/: cesm2_baseline_earthcare.npz, cesm2_baseline_earthcare.nc, catalog.json, and splits/{train,val,test}.npz
• Split arrays are collocation and labeled with columns z, T, K, q_total, aerosol, w, P, lat, lon, q_v, re_i, sza

This is a derived table. The original ESA product files are not in this repository.