{"artifact_id":"L1-468","layer":"L1","title":"Satellite Radar Altimetry","domain":"Geodesy","sub_domain":"Sea surface height","physics_fingerprint":{"L_DAG":2.5,"title":"Satellite Radar Altimetry","domain":"Geodesy","carrier":"RF","primitives":["S.altimeter.retracker_brown","G.structured","O.least_squares.retrack"],"sub_domain":"Sea surface height","noise_model":"thermal_gaussian","problem_class":"parameter_estimation","solution_space":"1D_sea_surface_height","difficulty_delta":3,"integration_axis":"range_surface","sensing_mechanism":"radar_altimetry_nadir"},"observable_profile":{"metric":"SSH_RMSE_cm","regime":"Existence of the recovered 1D_sea_surface_height is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 30); rain_contamination dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Thermal gaussian sets the irreducible data-fidelity floor.","secondary":"SWH_bias_cm"},"size_tiers":{"center_spec":{"omega":{"SWH_m":2.0,"N_gates":128,"mispointing_deg":0.1,"noise_sigma_percent":5.0},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"radar_altimetry_nadir","epsilon_fn_center":"3.0 SSH_RMSE_cm"},"omega_bounds":{"SWH_m":[0.0,10.0],"N_gates":[64,512],"mispointing_deg":[0.0,1.0],"noise_sigma_percent":[1.0,20.0]},"epsilon_bounds":{"SSH_RMSE_cm":[0.5,20.0]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["N_gates","SWH_m","mispointing_deg","noise_sigma_percent"],"allowed_forward_operators":["radar_altimetry_nadir"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":500,"metric":"SSH_RMSE_cm"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x9ad6cd94a55549fd9138ab92df0b45a76970484232800376df163cb6c8a8395a","chain_tx_hash":"0xe7c4f2cab5f62505f2ec421104771d1695e61a991dd5ec0a53b7eee09d87e32d","chain_block":41555298}