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earth_rover_mini_dataset.ipynb

@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "2dd2f079",
+   "id": "4f14fbd9",
    "metadata": {},
    "source": [
     "# FrodoBots-Mini-4K — Earth Rover Mini Dataset\n",
@@ -20,7 +20,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d72daaee",
+   "id": "14a6b24b",
    "metadata": {},
    "source": [
     "## The robot — Earth Rover Mini / Mini+\n",
@@ -46,13 +46,13 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "id": "89e3becc",
+   "id": "758629ef",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:48.738257Z",
-     "iopub.status.busy": "2026-07-10T06:36:48.738123Z",
-     "iopub.status.idle": "2026-07-10T06:36:49.586164Z",
-     "shell.execute_reply": "2026-07-10T06:36:49.585901Z"
+     "iopub.execute_input": "2026-07-10T06:43:38.340764Z",
+     "iopub.status.busy": "2026-07-10T06:43:38.340470Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.185969Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.185673Z"
     }
    },
    "outputs": [
@@ -84,7 +84,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f7fdcfb7",
+   "id": "5f8b3fa9",
    "metadata": {},
    "source": [
     "## Headline numbers\n"
@@ -93,13 +93,13 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "id": "5c963392",
+   "id": "9fc242d7",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:49.587476Z",
-     "iopub.status.busy": "2026-07-10T06:36:49.587394Z",
-     "iopub.status.idle": "2026-07-10T06:36:49.595637Z",
-     "shell.execute_reply": "2026-07-10T06:36:49.595398Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.187403Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.187299Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.195178Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.194944Z"
     }
    },
    "outputs": [
@@ -111,11 +111,10 @@
       "Unique robots:        453\n",
       "Date range:           2024-12-13 -> 2026-07-08\n",
       "\n",
-      "Hours (DB ride duration, raw):          3,965 h  <- headline (same metric as 2K/7K)\n",
-      "Hours (DB duration, capped 2h/ride):    3,709 h  (excludes left-open sessions)\n",
+      "Hours (teleoperation session time):     3,965 h   <- headline (~4K)\n",
+      "Hours (session time, capped 2h/ride):   3,709 h  (excludes left-open sessions)\n",
       "Hours (front-camera video footage):     3,231 h\n",
       "Hours (rear-camera video footage):      1,909 h\n",
-      "Hours (total video, front+rear):        5,140 h\n",
       "\n",
       "Rides with rear camera: 10,453\n",
       "Countries:              29 (+ Unknown)\n"
@@ -129,11 +128,10 @@
     "print(f'Unique robots:        {n_bots:,}')\n",
     "print(f'Date range:           {df.start_dt.min().date()} -> {df.start_dt.max().date()}')\n",
     "print()\n",
-    "print(f'Hours (DB ride duration, raw):          {df.db_hours.sum():,.0f} h  <- headline (same metric as 2K/7K)')\n",
-    "print(f'Hours (DB duration, capped 2h/ride):    {df.db_hours_cap2h.sum():,.0f} h  (excludes left-open sessions)')\n",
+    "print(f'Hours (teleoperation session time):     {df.db_hours.sum():,.0f} h   <- headline (~4K)')\n",
+    "print(f'Hours (session time, capped 2h/ride):   {df.db_hours_cap2h.sum():,.0f} h  (excludes left-open sessions)')\n",
     "print(f'Hours (front-camera video footage):     {df.front_footage_hours.sum():,.0f} h')\n",
     "print(f'Hours (rear-camera video footage):      {df.rear_footage_hours.sum():,.0f} h')\n",
-    "print(f'Hours (total video, front+rear):        {(df.front_footage_hours+df.rear_footage_hours).sum():,.0f} h')\n",
     "print()\n",
     "print(f'Rides with rear camera: {int(df.has_rear_camera.sum()):,}')\n",
     "print(f'Countries:              {df[df.country!=\"Unknown\"].country.nunique()} (+ Unknown)')\n"
@@ -141,19 +139,20 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b8fe8245",
+   "id": "46b89595",
    "metadata": {},
    "source": [
-    "### Two ways to count 'hours'\n",
-    "- **DB ride duration** = wall-clock length of each teleop session (session end − start). Matches the 2K/7K convention.\n",
-    "  A handful of sessions were left open for hours; capping each ride at 2 h removes that inflation.\n",
-    "- **Video footage** = actual recorded seconds (summed HLS segment durations). Lower than session time because\n",
-    "  the camera/link drops and reconnects during a ride. This is the amount of real video you get.\n"
+    "### Hours\n",
+    "The headline **~4,000 h** counts teleoperation **session duration** (session end − start). A handful of\n",
+    "sessions were left open for hours; capping each ride at 2 h removes that inflation. **Video footage**\n",
+    "(summed HLS segment durations) is reported separately and is lower than session time because the camera/link\n",
+    "drops and reconnects during a ride. Front and rear footage are reported separately and are **not** added\n",
+    "together (the two cameras overlap in time).\n"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "62051802",
+   "id": "9e758d3f",
    "metadata": {},
    "source": [
     "## Per-ride folder layout & schema\n",
@@ -174,7 +173,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d59fc142",
+   "id": "bd92d4e0",
    "metadata": {},
    "source": [
     "## Duration distribution\n"
@@ -183,13 +182,13 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "id": "3256143e",
+   "id": "7cd0eb4a",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:49.596950Z",
-     "iopub.status.busy": "2026-07-10T06:36:49.596870Z",
-     "iopub.status.idle": "2026-07-10T06:36:49.701665Z",
-     "shell.execute_reply": "2026-07-10T06:36:49.701367Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.196411Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.196324Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.301231Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.300948Z"
     }
    },
    "outputs": [
@@ -215,7 +214,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "33183945",
+   "id": "503f9b40",
    "metadata": {},
    "source": [
     "## Rides and hours over time\n"
@@ -224,13 +223,13 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "id": "a4dbbb21",
+   "id": "a6f99ea7",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:49.702950Z",
-     "iopub.status.busy": "2026-07-10T06:36:49.702847Z",
-     "iopub.status.idle": "2026-07-10T06:36:49.845581Z",
-     "shell.execute_reply": "2026-07-10T06:36:49.845291Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.302623Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.302512Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.442297Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.442031Z"
     }
    },
    "outputs": [
@@ -257,7 +256,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ab6c79ac",
+   "id": "e0162aa3",
    "metadata": {},
    "source": [
     "## By drive mode\n"
@@ -266,13 +265,13 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "id": "ad16814e",
+   "id": "80c872d0",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:49.846956Z",
-     "iopub.status.busy": "2026-07-10T06:36:49.846847Z",
-     "iopub.status.idle": "2026-07-10T06:36:49.910855Z",
-     "shell.execute_reply": "2026-07-10T06:36:49.910582Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.443611Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.443504Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.505688Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.505390Z"
     }
    },
    "outputs": [
@@ -310,7 +309,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8d65553a",
+   "id": "643e605d",
    "metadata": {},
    "source": [
     "## Geographic distribution\n",
@@ -320,13 +319,13 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "id": "2c63d352",
+   "id": "7a516ded",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:49.912155Z",
-     "iopub.status.busy": "2026-07-10T06:36:49.912056Z",
-     "iopub.status.idle": "2026-07-10T06:36:49.992383Z",
-     "shell.execute_reply": "2026-07-10T06:36:49.992117Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.506989Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.506881Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.589546Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.589269Z"
     }
    },
    "outputs": [
@@ -376,7 +375,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "13f966e9",
+   "id": "87f3a082",
    "metadata": {},
    "source": [
     "## Footage vs. session duration\n"
@@ -385,13 +384,13 @@
   {
    "cell_type": "code",
    "execution_count": 7,
-   "id": "df80638f",
+   "id": "52ef81a6",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:49.993744Z",
-     "iopub.status.busy": "2026-07-10T06:36:49.993572Z",
-     "iopub.status.idle": "2026-07-10T06:36:50.102269Z",
-     "shell.execute_reply": "2026-07-10T06:36:50.101987Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.590994Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.590885Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.699065Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.698780Z"
     }
    },
    "outputs": [
@@ -427,7 +426,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "877e2744",
+   "id": "10529627",
    "metadata": {},
    "source": [
     "## Data completeness\n",
@@ -438,13 +437,13 @@
   {
    "cell_type": "code",
    "execution_count": 8,
-   "id": "ee96105f",
+   "id": "3a9313ed",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:50.103588Z",
-     "iopub.status.busy": "2026-07-10T06:36:50.103502Z",
-     "iopub.status.idle": "2026-07-10T06:36:50.107249Z",
-     "shell.execute_reply": "2026-07-10T06:36:50.107008Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.700316Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.700232Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.703816Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.703574Z"
     }
    },
    "outputs": [
@@ -476,7 +475,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "836124ce",
+   "id": "250646a7",
    "metadata": {},
    "source": [
     "## Loading a single ride\n",
@@ -487,13 +486,13 @@
   {
    "cell_type": "code",
    "execution_count": 9,
-   "id": "ea33137e",
+   "id": "921c89a8",
    "metadata": {
     "execution": {
-     "iopub.execute_input": "2026-07-10T06:36:50.108515Z",
-     "iopub.status.busy": "2026-07-10T06:36:50.108417Z",
-     "iopub.status.idle": "2026-07-10T06:36:50.119195Z",
-     "shell.execute_reply": "2026-07-10T06:36:50.118954Z"
+     "iopub.execute_input": "2026-07-10T06:43:39.705067Z",
+     "iopub.status.busy": "2026-07-10T06:43:39.704972Z",
+     "iopub.status.idle": "2026-07-10T06:43:39.715782Z",
+     "shell.execute_reply": "2026-07-10T06:43:39.715470Z"
     }
    },
    "outputs": [
@@ -525,7 +524,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0da1fd4b",
+   "id": "223cc453",
    "metadata": {},
    "source": [
     "## Notes & known limitations\n",