{ "schema_version": 1, "harness": "scripts/score-served-occupancy.py", "started_at": "2026-08-05T17:49:15.030160+00:00", "measured_at": "2026-08-05T18:24:24.431638+00:00", "repo_commit": null, "repo_dirty": false, "box_state": { "load_average": { "1m": 48.47, "5m": 47.65, "15m": 47.68 }, "cpu_count": 20, "platform": "aarch64" }, "dataset": { "survey": "nairobi-region-2026-08-04-uhf-survey", "reference_floor_dbfs": -62.54, "ground_truth_method": "Derived from measured physics, not annotation: occupied = more than 8 dB over the same-session floor AND occupied-bandwidth fraction over 0.5; vacant = within 3 dB of that floor; anything between is ambiguous and is scored against neither. Both criteria are the ones capture-ota-iq.py already used, unchanged.", "records_per_channel": 20 }, "detector_thresholds": { "z_present_shipped": 3.5, "z_present_in_force": 3.5, "z_present_overridden": false, "z_null": 2.5, "energy_vacant_margin_db": 3.0, "energy_module_default_control_floor_dbfs": -59.9, "note": "z_present_in_force is what the cyclostationary plane actually thresholded on this run. When z_present_overridden is true this report is a SENSITIVITY run and does NOT describe the shipped detector." }, "model_identity": { "checkpoint": "/repo/external/tvws-sensing/models/checkpoints/best.pt", "checkpoint_sha256": "8eca022f09b897a579ef74225881343949a1a4a53b880edabf82225aacbb34ee", "note": "A checkpoint SHA pins a FILE. It does not prove any endpoint serves it." }, "split_rule": { "calibration_channels": "UHF 21-34 (lower half of the swept band)", "report_channels": "UHF 35-48", "why": "Any threshold changed on the strength of this survey must be justified on the calibration half; the headline is quoted from the report half." }, "arms": { "before": "InferenceEngine.infer(x) \u2014 CNN confidence only, the shipped path", "after": "InferenceEngine.infer(x, control_floor_dbfs=floor) \u2014 src.detect.decide" }, "results": { "all": { "before": { "occupied_channels": 10, "occupied_detected": 2, "vacant_channels": 15, "vacant_false_positive_channels": 1, "occupied_records_detected": 41, "occupied_records_total": 200, "vacant_records_false_positive": 48, "vacant_records_total": 300 }, "after": { "occupied_channels": 10, "occupied_detected": 10, "vacant_channels": 15, "vacant_false_positive_channels": 0, "occupied_records_detected": 193, "occupied_records_total": 200, "vacant_records_false_positive": 12, "vacant_records_total": 300 } }, "calibrate": { "before": { "occupied_channels": 7, "occupied_detected": 1, "vacant_channels": 4, "vacant_false_positive_channels": 1, "occupied_records_detected": 21, "occupied_records_total": 140, "vacant_records_false_positive": 30, "vacant_records_total": 80 }, "after": { "occupied_channels": 7, "occupied_detected": 7, "vacant_channels": 4, "vacant_false_positive_channels": 0, "occupied_records_detected": 137, "occupied_records_total": 140, "vacant_records_false_positive": 8, "vacant_records_total": 80 } }, "report": { "before": { "occupied_channels": 3, "occupied_detected": 1, "vacant_channels": 11, "vacant_false_positive_channels": 0, "occupied_records_detected": 20, "occupied_records_total": 60, "vacant_records_false_positive": 18, "vacant_records_total": 220 }, "after": { "occupied_channels": 3, "occupied_detected": 3, "vacant_channels": 11, "vacant_false_positive_channels": 0, "occupied_records_detected": 56, "occupied_records_total": 60, "vacant_records_false_positive": 4, "vacant_records_total": 220 } } }, "channels": [ { "uhf_channel": 21, "centre_mhz": 474, "excess_over_session_floor_db": 0.88, "derived_truth": "vacant", "split": "calibrate", "n_records": 20, "before_occupied_records": 2, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 1.677, "verdict": "NULL", "best_mode": "DVB-T2/T 2K" } }, { "uhf_channel": 22, "centre_mhz": 482, "excess_over_session_floor_db": 3.69, "derived_truth": "ambiguous", "split": "calibrate", "n_records": 20, "before_occupied_records": 2, "after_occupied_records": 0, "after_verdicts": { "UNKNOWN": 6, "VACANT": 14 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 0.905, "verdict": "NULL", "best_mode": "ISDB-T mode 1" } }, { "uhf_channel": 23, "centre_mhz": 490, "excess_over_session_floor_db": 0.73, "derived_truth": "vacant", "split": "calibrate", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 0, "after_verdicts": { "UNKNOWN": 3, "VACANT": 17 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 2.101, "verdict": "NULL", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 24, "centre_mhz": 498, "excess_over_session_floor_db": 6.8, "derived_truth": "ambiguous", "split": "calibrate", "n_records": 20, "before_occupied_records": 10, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Wireless Mic", "cyclo_first_record": { "comb_z_max": 7.062, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 4K" } }, { "uhf_channel": 25, "centre_mhz": 506, "excess_over_session_floor_db": 17.73, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 20, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "DVB-T", "cyclo_first_record": { "comb_z_max": 20.434, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 4K" } }, { "uhf_channel": 26, "centre_mhz": 514, "excess_over_session_floor_db": 8.78, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 19, "after_verdicts": { "OCCUPIED": 19, "UNKNOWN": 1 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 5.366, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 4K" } }, { "uhf_channel": 27, "centre_mhz": 522, "excess_over_session_floor_db": -0.59, "derived_truth": "vacant", "split": "calibrate", "n_records": 20, "before_occupied_records": 8, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.571, "verdict": "NULL", "best_mode": "ISDB-T mode 1" } }, { "uhf_channel": 28, "centre_mhz": 530, "excess_over_session_floor_db": 0.39, "derived_truth": "vacant", "split": "calibrate", "n_records": 20, "before_occupied_records": 20, "after_occupied_records": 8, "after_verdicts": { "OCCUPIED": 8, "UNKNOWN": 4, "VACANT": 8 }, "cnn_modulation_top": "ATSC", "cyclo_first_record": { "comb_z_max": 4.9, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 29, "centre_mhz": 538, "excess_over_session_floor_db": 6.22, "derived_truth": "ambiguous", "split": "calibrate", "n_records": 20, "before_occupied_records": 1, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 8.871, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 30, "centre_mhz": 546, "excess_over_session_floor_db": 10.26, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 6.937, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 31, "centre_mhz": 554, "excess_over_session_floor_db": 29.38, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 1, "after_occupied_records": 18, "after_verdicts": { "OCCUPIED": 18, "UNKNOWN": 2 }, "cnn_modulation_top": "Wireless Mic", "cyclo_first_record": { "comb_z_max": 5.841, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 32, "centre_mhz": 562, "excess_over_session_floor_db": 42.2, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 15.66, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 33, "centre_mhz": 570, "excess_over_session_floor_db": 41.39, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 14.722, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 4K" } }, { "uhf_channel": 34, "centre_mhz": 578, "excess_over_session_floor_db": 27.74, "derived_truth": "occupied", "split": "calibrate", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 8.952, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 35, "centre_mhz": 586, "excess_over_session_floor_db": 29.81, "derived_truth": "occupied", "split": "report", "n_records": 20, "before_occupied_records": 20, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "DVB-T", "cyclo_first_record": { "comb_z_max": 17.3, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 36, "centre_mhz": 594, "excess_over_session_floor_db": 19.2, "derived_truth": "occupied", "split": "report", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 16, "after_verdicts": { "OCCUPIED": 16, "UNKNOWN": 4 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 8.99, "verdict": "OFDM_PRESENT", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 37, "centre_mhz": 602, "excess_over_session_floor_db": 2.33, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 8, "after_occupied_records": 4, "after_verdicts": { "OCCUPIED": 4, "UNKNOWN": 4, "VACANT": 12 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 3.289, "verdict": "AMBIGUOUS", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 38, "centre_mhz": 610, "excess_over_session_floor_db": 0.23, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.301, "verdict": "NULL", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 39, "centre_mhz": 618, "excess_over_session_floor_db": 15.88, "derived_truth": "occupied", "split": "report", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 20, "after_verdicts": { "OCCUPIED": 20 }, "cnn_modulation_top": "Noise", "cyclo_first_record": { "comb_z_max": 1.045, "verdict": "NULL", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 40, "centre_mhz": 626, "excess_over_session_floor_db": 0.42, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 1, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.423, "verdict": "NULL", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 41, "centre_mhz": 634, "excess_over_session_floor_db": -0.21, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 1, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.539, "verdict": "NULL", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 42, "centre_mhz": 642, "excess_over_session_floor_db": -0.05, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 4, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 0.637, "verdict": "NULL", "best_mode": "ISDB-T mode 1" } }, { "uhf_channel": 43, "centre_mhz": 650, "excess_over_session_floor_db": -0.2, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.294, "verdict": "NULL", "best_mode": "ISDB-T mode 3" } }, { "uhf_channel": 44, "centre_mhz": 658, "excess_over_session_floor_db": -0.03, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 2, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.196, "verdict": "NULL", "best_mode": "ISDB-T mode 1" } }, { "uhf_channel": 45, "centre_mhz": 666, "excess_over_session_floor_db": -0.05, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 1, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.157, "verdict": "NULL", "best_mode": "DVB-T2/T 8K" } }, { "uhf_channel": 46, "centre_mhz": 674, "excess_over_session_floor_db": -0.14, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 0.982, "verdict": "NULL", "best_mode": "ISDB-T mode 2" } }, { "uhf_channel": 47, "centre_mhz": 682, "excess_over_session_floor_db": 0.03, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 0, "after_occupied_records": 0, "after_verdicts": { "VACANT": 20 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.458, "verdict": "NULL", "best_mode": "ISDB-T mode 1" } }, { "uhf_channel": 48, "centre_mhz": 690, "excess_over_session_floor_db": 0.27, "derived_truth": "vacant", "split": "report", "n_records": 20, "before_occupied_records": 1, "after_occupied_records": 0, "after_verdicts": { "UNKNOWN": 1, "VACANT": 19 }, "cnn_modulation_top": "Unknown", "cyclo_first_record": { "comb_z_max": 1.174, "verdict": "NULL", "best_mode": "ISDB-T mode 3" } } ], "caveats": [ "Ambiguous channels are scored against neither arm, by design.", "One site, one session, one antenna (SenseCAP 860-930 MHz used at 470-700 MHz). The mismatch does not affect the OCCUPIED direction \u2014 falsified 2026-08-04 at +42 dB \u2014 but it does compress the dynamic range available for vacant-channel work.", "The CNN's modulation label is reported but never scored here: the captures are DVB-T2 and the model has no DVB-T2 class." ] }