run 10, reports 08-10 + all reports (review), sync mode names BEACON_TIMESYNC / RECEIVER_TIMESTAMP

.gitattributes

@@ -112,3 +112,7 @@ data/S01/R08/level/imu-back-3333.csv filter=lfs diff=lfs merge=lfs -text
 data/S01/R08/level/imu-left_foot-2222.csv filter=lfs diff=lfs merge=lfs -text
 data/S01/R08/level/imu-right_foot-5555.csv filter=lfs diff=lfs merge=lfs -text
 data/S01/R08/level/imu-wrist-0000.csv filter=lfs diff=lfs merge=lfs -text
+data/S01/R10/level/imu-back-4444.csv filter=lfs diff=lfs merge=lfs -text
+data/S01/R10/level/imu-left_foot-3333.csv filter=lfs diff=lfs merge=lfs -text
+data/S01/R10/level/imu-right_foot-2222.csv filter=lfs diff=lfs merge=lfs -text
+data/S01/R10/level/imu-wrist-0000.csv filter=lfs diff=lfs merge=lfs -text

README.md

@@ -59,26 +59,33 @@ sensors against.
 *One 61-minute run at a glance: movement from each LEVEL sensor, heart rate, speed, cadence and
 relative elevation, all on one clock. Gaps are real dropouts.*
 
+## Reports
+
+Written-up results: the cumulative [SUMMARY](reports/SUMMARY.html) (objective, literature,
+methodology, longitudinal results) and one report per run, listed in the
+[report index](reports/README.html). Each is a self-contained HTML page with its figures embedded.
+
 ## The sessions
 
 <!-- glance:start (generated by scripts/make_catalog.py) -->
-**9 sessions, 1 participant, 4.9 h of recording, 25 km outdoors, 2026-09-07 to 2026-10-03.**
+**10 sessions, 1 participant, 5.4 h of recording, 32 km outdoors, 2026-09-07 to 2026-10-05.**
 <!-- glance:end -->
 
 <!-- sessions:start (generated by scripts/make_catalog.py from sessions.csv -- do not edit by hand) -->
-| Date | Session | Conditions | Duration (min) | Distance (km) | LEVEL sensors | Reference data | Packet loss (%) | Eff. rate (Hz) | Max gap (s) |
-|---|---|---|---:|---:|---|---|---:|---:|---:|
-| 2026-09-07 | [R01](figures/S01/R01/overview.png) | outdoor pavement | 61 | 7.21 | 4: Arm, Back, Left Foot, Right Foot | watch | 0.6 | 99.3 | 0.31 |
-| 2026-09-12 | [R02](figures/S01/R02/overview.png) | outdoor pavement, parkrun | 44 | 5.29 | 4: Back, Left Foot, Left Wrist, Right Foot | chest strap, watch | 10.4 | 89.5 | 0.66 |
-| 2026-09-14 | [R03](figures/S01/R03/overview.png) | outdoor pavement | 32 | 3.47 | 4: Back, Left Foot, Left Wrist, Right Foot | chest strap, watch | 4.0 | 95.9 | 0.51 |
-| 2026-09-14 | [R04](figures/S01/R04/overview.png) | outdoor pavement | 28 | 2.91 | 4: Back, Left Foot, Left Wrist, Right Foot | watch | 4.1 | 95.8 | 1.51 |
-| 2026-09-17 | [R05](figures/S01/R05/overview.png) | indoor track | 8 |  | 4: Back, Left Foot, Left Wrist, Right Foot | chest strap | 0.3 | 99.6 | 0.31 |
-| 2026-09-19 | [R06](figures/S01/R06/overview.png) | outdoor pavement, race | 15 | 1.94 | 4: Back, Left Foot, Left Wrist, Right Foot | chest strap | 6.6 | 93.3 | 0.71 |
-| 2026-09-28 | [R07](figures/S01/R07/overview.png) | outdoor pavement | 37 | 4.24 | 4: Back, Left Foot, Left Wrist, Right Foot |  | 3.6 | 96.3 | 0.41 |
-| 2026-09-30 | [R08](figures/S01/R08/overview.png) | outdoor pavement | 45 |  | 4: Back, Left Foot, Right Foot, Wrist |  | 0.7 | 99.2 | 0.31 |
-| 2026-10-03 | [R09](figures/S01/R09/overview.png) | outdoor pavement, parkrun | 20 |  | 4: Back, Left Foot, Right Foot, Wrist |  | 0.0 | 99.9 | 0.01 |
-
-*9 sessions. Click a session for its overview figure; every column (setup, versions, heart rate, capture quality) is in `sessions.csv`.*
+| Date | Session | Conditions | Data (min) | Run (min) | Distance (km) | LEVEL sensors | Reference data | Packet loss (%) | Eff. rate (Hz) | Max gap (s) |
+|---|---|---|---:|---:|---:|---:|---|---:|---:|---:|
+| 2026-09-07 | [R01](figures/S01/R01/overview.png) | outdoor | 61 | 61 | 7.21 | 4 | watch | 0.6 | 99.3 | 0.31 |
+| 2026-09-12 | [R02](figures/S01/R02/overview.png) | outdoor | 44 | 44 | 5.00 | 4 | chest strap, watch | 10.4 | 89.5 | 0.66 |
+| 2026-09-14 | [R03](figures/S01/R03/overview.png) | outdoor | 32 | 32 | 3.47 | 4 | chest strap, watch | 4.0 | 95.9 | 0.51 |
+| 2026-09-14 | [R04](figures/S01/R04/overview.png) | outdoor | 28 | 29 | 2.91 | 4 | watch | 4.1 | 95.8 | 1.51 |
+| 2026-09-17 | [R05](figures/S01/R05/overview.png) | indoor | 8 | 8 |  | 4 | chest strap | 0.3 | 99.6 | 0.31 |
+| 2026-09-19 | [R06](figures/S01/R06/overview.png) | outdoor | 15 |  |  | 4 | chest strap | 6.6 | 93.3 | 0.71 |
+| 2026-09-28 | [R07](figures/S01/R07/overview.png) | outdoor | 37 | 37 | 4.24 | 4 |  | 3.6 | 96.3 | 0.41 |
+| 2026-09-30 | [R08](figures/S01/R08/overview.png) | outdoor | 45 | 45 |  | 4 |  | 0.7 | 99.2 | 0.31 |
+| 2026-10-03 | [R09](figures/S01/R09/overview.png) | outdoor | 20 | 41 | 5.00 | 4 | watch | 0.0 | 99.9 | 0.01 |
+| 2026-10-05 | [R10](figures/S01/R10/overview.png) | outdoor | 33 | 33 | 4.46 | 4 | watch | 1.9 | 98.0 | 0.36 |
+
+*10 sessions. Click a session for its overview figure; every column (setup, versions, heart rate, capture quality) is in `sessions.csv`.*
 <!-- sessions:end -->
 
 Every run's figures sit in `figures/<subject>/<session>/`: `overview.png` (start there), `data-*.png` for

data/S01/R09/fit3/fit3_live.csv

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data/S01/R09/fit3/fit3_summary.csv

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+start_time,duration_s,distance_m,hr_mean,hr_max,hr_min,cadence_mean,cadence_max,speed_mean_mps,speed_max_mps,calorie_kcal,vo2_max,altitude_gain_m,altitude_loss_m
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data/S01/R09/level/meta-summary.json

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     "session": {
         "activityCode": "BTIMU_RAW",
         "sensorType": "BT_IMU",
-        "startedAtIso": "1970-01-01T00:00:00+00:00",
-        "startedAtMs": 0,
-        "endedAtMs": 1211544,
+        "startedAtIso": "1970-01-01T00:00:07.471000+00:00",
+        "startedAtMs": 7471,
+        "endedAtMs": 1219015,
         "durationMs": 1211544,
         "endReason": "clean"
     },

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data/S01/R10/fit3/fit3_summary.csv

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+start_time,duration_s,distance_m,hr_mean,hr_max,hr_min,cadence_mean,cadence_max,speed_mean_mps,speed_max_mps,calorie_kcal,vo2_max,altitude_gain_m,altitude_loss_m
+20697000,1979.0,4461.0,157.0,171.0,119.0,149.0,158.0,2.254,2.729,317.0,,,

data/S01/R10/level/imu-back-4444.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:18c3d35f7a16a0ec56a2183c0a076e7c80769136db0517cb1e666a53f3dec656
+size 16586247

data/S01/R10/level/imu-left_foot-3333.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29b8f8dc72cba2e39478a92e5cdced76e39fccf3e14cf19b5171bad9654d68bb
+size 16641497

data/S01/R10/level/imu-right_foot-2222.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fa48e0827c626b4d1eef7960e61bc32ba17c499c90e4a58bf981118257827951
+size 16630514

data/S01/R10/level/imu-wrist-0000.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d832533f88562f0beee3847bdbf5a941ce2346a025e7552d0f1c3f5b0c2752ab
+size 16658989

data/S01/R10/level/meta-summary.json

@@ -0,0 +1,91 @@
+{
+    "schema_version": 2,
+    "app": {
+        "versionName": "0.1.13-exp"
+    },
+    "session": {
+        "activityCode": "BTIMU_RAW",
+        "sensorType": "BT_IMU",
+        "startedAtIso": "1970-01-01T00:00:00+00:00",
+        "startedAtMs": 0,
+        "endedAtMs": 1986280,
+        "durationMs": 1986280,
+        "endReason": "clean"
+    },
+    "sensors": [
+        {
+            "shortMac": "4444",
+            "sensorLabel": "back",
+            "transport": "DONGLE",
+            "firmwareVersion": "0.102.0"
+        },
+        {
+            "shortMac": "3333",
+            "sensorLabel": "left_foot",
+            "transport": "DONGLE",
+            "firmwareVersion": "0.102.0"
+        },
+        {
+            "shortMac": "2222",
+            "sensorLabel": "right_foot",
+            "transport": "DONGLE",
+            "firmwareVersion": "0.102.0"
+        },
+        {
+            "shortMac": "0000",
+            "sensorLabel": "wrist",
+            "transport": "DONGLE",
+            "firmwareVersion": "0.102.0"
+        }
+    ],
+    "transports": [
+        {
+            "type": "DONGLE",
+            "shortMac": null,
+            "firmwareVersion": "0.102.0"
+        }
+    ],
+    "settings": {
+        "sampling_rate_hz": "100.0",
+        "sensor_count": "4",
+        "time_sync": "true"
+    },
+    "files": [
+        {
+            "name": "imu-right_foot-2222.csv",
+            "modality": "ACCEL_GYRO",
+            "shortMac": "2222",
+            "rotationCount": 1,
+            "units": "us, m/s^2, rad/s"
+        },
+        {
+            "name": "imu-wrist-0000.csv",
+            "modality": "ACCEL_GYRO",
+            "shortMac": "0000",
+            "rotationCount": 1,
+            "units": "us, m/s^2, rad/s"
+        },
+        {
+            "name": "imu-back-4444.csv",
+            "modality": "ACCEL_GYRO",
+            "shortMac": "4444",
+            "rotationCount": 1,
+            "units": "us, m/s^2, rad/s"
+        },
+        {
+            "name": "imu-left_foot-3333.csv",
+            "modality": "ACCEL_GYRO",
+            "shortMac": "3333",
+            "rotationCount": 1,
+            "units": "us, m/s^2, rad/s"
+        },
+        {
+            "name": "meta-summary.json",
+            "modality": "META",
+            "shortMac": null,
+            "rotationCount": 1,
+            "units": null
+        }
+    ],
+    "notes": null
+}

data/context/session_context.csv

@@ -1,10 +1,11 @@
-subject,session,date,setting,surface,event,location,other_bluetooth_reported,sensor_firmware_reported,dongle_firmware_reported,phone_model_reported,phone_carry,calibration,terminated_early,unreliable_sensors,clock,gps,time_method,time_sync_mode,time_sync_verdict,samples_per_packet,phone_model,bluetooth_devices,phone_battery_start_pct,phone_battery_end_pct,phone_temp_start_c,phone_temp_end_c,sensor_voltage_start_v,sensor_voltage_end_v,sensor_temp_start_c,sensor_temp_end_c,notes
-S01,R01,2026-09-07,outdoor,pavement,,,headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,pack,pre,False,arm,synthetic,profile,first_sample_anchor,,,,,,,,,,4.17,4.17,,,"The wrist sensor (0000, labelled arm) came off mid-run when its tape failed and rode in a pocket or hand for most of the run: its stream is not wrist motion and its accelerometer clipping is handling. The right foot (3333) clipped 47 times (peak 23 g), the left foot (2222) never, possibly a mounting difference. Barometer at 24 Hz (later builds cap it at 1 Hz)"
-S01,R02,2026-09-12,outdoor,pavement,parkrun,"Victoria Park parkrun, Kitchener",headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,pack,pre,False,,synthetic,profile,first_sample_anchor,,,,,,90,79,30.9,35.6,4.11,4.03,25.0,25.0,Foot clips re-mounted after R01 (bottom lace plus two more). Three sensors dropped in the last ~2 min and reconnected at session end (not battery). Phone GPS read 5.29 km on the 5.00 km course (+5.8 %); the watch read 5.00 km
-S01,R03,2026-09-14,outdoor,pavement,,,headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,pack,pre,False,,synthetic,profile,first_sample_anchor,,,,,,,,,,,,,,"The two foot sensors are about 0.3 s apart although time sync was on: timing between sensors is unreliable in this session, each sensor's own signal is fine"
-S01,R04,2026-09-14,outdoor,pavement,,,headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,pack,pre,False,,synthetic,profile,first_sample_anchor,,,,,,,,,,,,,,
-S01,R05,2026-09-17,indoor,track,,,none,0.100.0,0.98.0,samsung Galaxy S24,pack,pre,False,,synthetic,profile,first_sample_anchor,HARDWARE_TS_TB,MISALIGNED,,,,73,72,32.3,27.4,4.15,4.13,30.5,29.0,
-S01,R06,2026-09-19,outdoor,pavement,race,,headphones,0.100.0,0.98.0,samsung Galaxy S24,pack,pre,True,,synthetic,profile,first_sample_anchor,HARDWARE_TS_TB,MISALIGNED,,,,84,80,26.3,32.2,4.07,4.05,28.6,27.5,The recording ended about 15 min into the event
-S01,R07,2026-09-28,outdoor,pavement,,,,0.100.0,0.98.0,,pack,pre,False,,synthetic,profile,first_sample_anchor,HARDWARE_TS_TB,ALIGNED,,samsung SM-S926W,none,100,95,23.6,25.3,4.1,4.03,25.4,24.1,The second phone (streaming to Bluetooth headphones) was in the same waist pack for the first ~23 min: IMU packet loss was 3-8 % while it was there and ~0 % after it was taken out. Three of the four IMU files end ~40 s before the session
-S01,R08,2026-09-30,outdoor,pavement,,,,,,,hand,post,False,back,synthetic,profile,first_sample_anchor,HARDWARE_TS_TB,ALIGNED,5,samsung SM-S926W,none,100,98,24.5,19.5,4.14,4.08,28.4,25.7,"Phone carried in the hand. GPS off, so no pace profile; the barometer and step counter were still logged. The back sensor was loose and re-seated several times: trunk measures such as vertical oscillation are unreliable, the feet are unaffected. The pre-run calibration walk did not register on the feet, so the post-run calibration is used"
-S01,R09,2026-10-03,outdoor,pavement,parkrun,"Victoria Park parkrun, Kitchener",,,,,pack,pre,True,,synthetic,profile,first_sample_anchor,HARDWARE_TS_TB,ALIGNED,5,samsung SM-S926W,none,90,88,23.8,23.5,4.08,4.05,28.6,26.2,"Dongle on a short USB cable; the second phone was in the same pack, powered off. The recording covers the first ~18 min of a ~41 min event: the sensor data then stopped with no error while sensors and dongle still reported connected"
+subject,session,date,setting,surface,event,location,other_bluetooth_reported,sensor_firmware_reported,dongle_firmware_reported,phone_model_reported,distance_km_reported,run_duration_min_reported,phone_carry,calibration,terminated_early,unreliable_sensors,clock,gps,time_method,time_sync_mode,time_sync_verdict,samples_per_packet,phone_model,bluetooth_devices,phone_battery_start_pct,phone_battery_end_pct,phone_temp_start_c,phone_temp_end_c,sensor_voltage_start_v,sensor_voltage_end_v,sensor_temp_start_c,sensor_temp_end_c,notes
+S01,R01,2026-09-07,outdoor,pavement,,,headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,,,pack,pre,False,arm,synthetic,profile,first_sample_anchor,,,,,,,,,,4.17,4.17,,,"The wrist sensor (0000, labelled arm) came off mid-run when its tape failed and rode in a pocket or hand for most of the run: its stream is not wrist motion and its accelerometer clipping is handling. The right foot (3333) clipped 47 times (peak 23 g), the left foot (2222) never, possibly a mounting difference. Barometer at 24 Hz (later builds cap it at 1 Hz)"
+S01,R02,2026-09-12,outdoor,pavement,parkrun,"Victoria Park parkrun, Kitchener",headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,5.00,,pack,pre,False,,synthetic,profile,first_sample_anchor,,,,,,90,79,30.9,35.6,4.11,4.03,25.0,25.0,Foot clips re-mounted after R01 (bottom lace plus two more). Three sensors dropped in the last ~2 min and reconnected at session end (not battery). Phone GPS read 5.29 km on the 5.00 km course (+5.8 %); the watch read 5.00 km
+S01,R03,2026-09-14,outdoor,pavement,,,headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,,,pack,pre,False,,synthetic,profile,first_sample_anchor,,,,,,,,,,,,,,"The two foot sensors are about 0.3 s apart although time sync was on: timing between sensors is unreliable in this session, each sensor's own signal is fine"
+S01,R04,2026-09-14,outdoor,pavement,,,headphones;watch,0.100.0,0.98.0,samsung Galaxy S24,,,pack,pre,False,,synthetic,profile,first_sample_anchor,,,,,,,,,,,,,,
+S01,R05,2026-09-17,indoor,track,,,none,0.100.0,0.98.0,samsung Galaxy S24,,,pack,pre,False,,synthetic,profile,first_sample_anchor,BEACON_TIMESYNC,MISALIGNED,,,,73,72,32.3,27.4,4.15,4.13,30.5,29.0,
+S01,R06,2026-09-19,outdoor,pavement,race,,headphones,0.100.0,0.98.0,samsung Galaxy S24,,,pack,pre,True,,synthetic,profile,first_sample_anchor,BEACON_TIMESYNC,MISALIGNED,,,,84,80,26.3,32.2,4.07,4.05,28.6,27.5,The recording ended about 15 min into the event
+S01,R07,2026-09-28,outdoor,pavement,,,,0.100.0,0.98.0,,,,pack,pre,False,,synthetic,profile,first_sample_anchor,BEACON_TIMESYNC,ALIGNED,,samsung SM-S926W,none,100,95,23.6,25.3,4.1,4.03,25.4,24.1,The second phone (streaming to Bluetooth headphones) was in the same waist pack for the first ~23 min: IMU packet loss was 3-8 % while it was there and ~0 % after it was taken out. Three of the four IMU files end ~40 s before the session
+S01,R08,2026-09-30,outdoor,pavement,,,,,,,,,hand,post,False,back,synthetic,profile,first_sample_anchor,BEACON_TIMESYNC,ALIGNED,5,samsung SM-S926W,none,100,98,24.5,19.5,4.14,4.08,28.4,25.7,"Phone carried in the hand. GPS off, so no pace profile; the barometer and step counter were still logged. The back sensor was loose and re-seated several times: trunk measures such as vertical oscillation are unreliable, the feet are unaffected. The pre-run calibration walk did not register on the feet, so the post-run calibration is used"
+S01,R09,2026-10-03,outdoor,pavement,parkrun,"Victoria Park parkrun, Kitchener",,,,,5.00,41,pack,pre,True,,synthetic,profile,first_sample_anchor,BEACON_TIMESYNC,ALIGNED,5,samsung SM-S926W,none,90,88,23.8,23.5,4.08,4.05,28.6,26.2,"Dongle on a short USB cable; the second phone was in the same pack, powered off. The recording covers the first ~18 min of a ~41 min event: the sensor data then stopped with no error while sensors and dongle still reported connected; The watch was in airplane mode with no GPS, so its distance is an estimate and reads well above the 5.00 km course"
+S01,R10,2026-10-05,outdoor,pavement,,,,,,samsung Galaxy S24,,,pack,pre,False,,synthetic,profile,first_sample_anchor,BEACON_TIMESYNC,ALIGNED,5,samsung SM-S926W,none,81,80,25.0,22.1,4.06,4.02,25.9,28.6,"Phone carried in the waist pack, with a second phone in the pack powered off. GPS off, so no pace profile. IMU data loss was 1.7-2.1 % per sensor (effective rate 97.8-98.2 Hz of 100 Hz): 428-539 gaps per sensor, every one a whole number of 50 ms packets; 58-67 % of gaps were a single packet (50 ms), 98-99 % were 4 packets (200 ms) or fewer, and the longest was 0.3-0.4 s. The gaps cluster in about seven short episodes (rate dipping to ~70 Hz, each lasting up to ~1.5 min) that hit all four sensors at once, with full rate in between. Three of the four IMU files end 5-9 s before the session end."

data/data_dictionary.md

@@ -162,7 +162,7 @@ them, so the folders are anonymous on their own and this file sets the release's
 | `clock` | `synthetic` or `real` (see 2.6) |
 | `gps` | `profile`: the phone GPS track is released only as the coordinate-free `pace_profile.csv` (2.3) |
 | `time_method` | how `time` was placed on the host clock (1.2.1): `first_sample_anchor` |
-| `time_sync_mode`, `time_sync_verdict` | the sensor time-sync mode (e.g. `HARDWARE_TS_TB`) and its result: `ALIGNED` when every sensor's clock agreed with the reference sensor's within 50 ms at the end of the session, else `MISALIGNED`. `MISALIGNED` means timing *between* sensors (e.g. left vs right foot) is unreliable in that session; each sensor's own signal is unaffected. `null` when that app build did not record it |
+| `time_sync_mode`, `time_sync_verdict` | the sensor time-sync mode -- `BEACON_TIMESYNC` (sync on: the sensors share one clock) or `RECEIVER_TIMESTAMP` (sync off: each sample is stamped when it reaches the receiver) -- and its result: `ALIGNED` when every sensor's clock agreed with the reference sensor's within 50 ms at the end of the session, else `MISALIGNED`. `MISALIGNED` means timing *between* sensors (e.g. left vs right foot) is unreliable in that session; each sensor's own signal is unaffected. `null` when that app build did not record it |
 | `samples_per_packet` | samples per radio packet, for recordings whose `meta-summary.json` (schema 2) does not carry it |
 | `phone_model` | the recording phone (manufacturer and model; for sessions before 2026-09-28, as reported by the participant) |
 | `bluetooth_devices` | other Bluetooth devices connected to the phone during the session, as recorded by the app: `;`-list of `headphones` / `watch` / `other`, or `none`; `null` for app builds before 2026-09-21 |
@@ -212,12 +212,12 @@ One row per session; columns in groups, read left to right.
 | | `sampling_rate_hz`, `samples_per_packet` | stream settings |
 | | `transport`, `dongle_firmware`, `sensor_firmware`, `app_version` | how the data travelled, and versions |
 | | `phone_model`, `bluetooth_devices` | host phone, and the other Bluetooth devices sharing its radio as a `;`-list of `none` / `headphones` / `watch` / `other` (from the app's record; for sessions before 2026-09-21, from the participant's report); blank = unknown |
-| | `time_sync` | time-sync mode (blank = not recorded by that app build) |
+| | `time_sync` | time-sync mode, `BEACON_TIMESYNC` or `RECEIVER_TIMESTAMP` (blank = not recorded by that app build) |
 | | `phone_carry`, `calibration` | from `context/session_context.csv` |
 | Data available | `gps`, `barometer`, `steps` | `true` when the session has that phone file (`gps` = the coordinate-free `pace_profile.csv`) |
 | | `h10_hr`, `h10_ecg`, `h10_acc` | `true` when the session has that Polar H10 file |
 | | `watch` | `true` when the session has the Fit3 files (`fit3/`) |
-| Run | `duration_min`, `distance_km`, `pace_min_km` | from the session and phone GPS (outdoors only) |
+| Run | `duration_min`, `run_duration_min`, `run_duration_source`, `distance_km`, `distance_source`, `pace_min_km` | `duration_min` = how long the LEVEL recording ran. `run_duration_min` and `distance_km` describe the run itself, from the first source that has them: `reported` (set by hand, e.g. a parkrun is 5.00 km), `phone_gps` (outdoors only), `fit3` (the watch; its clock is not synced to the app, so a few minutes' difference is expected), then for duration the `recording` itself unless the notes say it stopped before the run ended. `pace_min_km` = run duration / distance |
 | | `hr_mean_bpm`, `hr_max_bpm`, `hr_source` | from the chest strap if it covered >= 80 % of the run, else the watch |
 | | `cadence_mean_spm`, `cadence_source` | from the watch (`fit3`) if worn, else the phone step counter (`phone_steps`) |
 | Capture analysis | `loss_pct` | samples lost in transit: gaps in `frame_sensor` between each sensor's first and last sample (gaps over 2 s sized from `time`), averaged over the session's sensors. A sensor that stops for good shows as a short run, not as loss |