src/lib/api/index.ts

@@ -1,4 +1,5 @@
 export { api, ApiError, API_BASE_URL, setUnauthorizedHandler } from './client';
+export { telemetryApi, buildWsUrl, type RawTelemetryPacket } from './telemetry';
 export { pointsApi } from './points';
 export { profilesApi } from './profiles';
 export { scenariosApi } from './scenarios';

src/lib/api/telemetry.ts

@@ -0,0 +1,35 @@
+import { api, API_BASE_URL } from './client';
+
+export interface RawTelemetryPacket {
+	id: string;
+	timestamp: number; // unix seconds
+	lat: number;
+	lon: number;
+	alt: number;
+	payload: Record<string, unknown>;
+	raw_data: Record<string, unknown>;
+}
+
+/** Derives a WebSocket URL from the configured API base URL. */
+export function buildWsUrl(satelliteId: string): string {
+	let base = API_BASE_URL;
+	if (!base.startsWith('http')) {
+		base = `${window.location.protocol}//${window.location.host}${base}`;
+	}
+	const url = new URL(base);
+	url.protocol = url.protocol === 'https:' ? 'wss:' : 'ws:';
+	return `${url.origin}${url.pathname}/ws/satellite/${satelliteId}/telemetry/`;
+}
+
+export const telemetryApi = {
+	fetchHistory: async (
+		satelliteId: string,
+		params?: { from?: number; till?: number },
+	): Promise<RawTelemetryPacket[]> => {
+		const res = await api.get<RawTelemetryPacket[] | { results: RawTelemetryPacket[] }>(
+			`/${satelliteId}/telemetry/`,
+			{ query: params },
+		);
+		return Array.isArray(res) ? res : res.results;
+	},
+};

src/lib/features/tracking/TelemetryPanel.svelte

@@ -1,36 +1,100 @@
 <script lang="ts">
-	import { FormGroup, Label, Input, InputGroup } from '@sveltestrap/sveltestrap';
+	import { onDestroy } from 'svelte';
+	import { FormGroup, Label, Input, InputGroup, Button, Badge } from '@sveltestrap/sveltestrap';
 	import { CollapsibleCard } from '$ui';
 	import { t } from '$i18n';
+	import { telemetryStore } from './telemetryStore.svelte';
 
-	// Placeholder — wire to the tracking telemetry store once the tracking
+	let satelliteInput = $state('');
-	// pipeline has a real data source.
+
-	let telemetry: { latitude?: number; longitude?: number; altitude?: number } = $state({
+	const STATUS_COLOR: Record<string, string> = {
-		latitude: 56.3576,
+		idle: 'secondary',
-		longitude: 39.8666,
+		connecting: 'warning',
-		altitude: 1000,
+		connected: 'success',
+		error: 'danger',
+	};
+
+	function handleConnect() {
+		const id = satelliteInput.trim();
+		if (id) telemetryStore.connect(id);
+	}
+
+	function handleDisconnect() {
+		telemetryStore.disconnect();
+		satelliteInput = '';
+	}
+
+	onDestroy(() => {
+		telemetryStore.disconnect();
 	});
 </script>
 
 <CollapsibleCard title={$t('nav.track')}>
+	<FormGroup spacing="mb-2">
+		<Label class="small">{$t('tracking.satelliteId')}</Label>
+		<div class="d-flex gap-1">
+			<Input
+				type="text"
+				size="sm"
+				bind:value={satelliteInput}
+				placeholder={$t('tracking.satelliteIdPlaceholder')}
+				disabled={telemetryStore.status !== 'idle'}
+			/>
+			{#if telemetryStore.status === 'idle'}
+				<Button
+					size="sm"
+					color="primary"
+					onclick={handleConnect}
+					disabled={!satelliteInput.trim()}
+				>
+					{$t('tracking.connect')}
+				</Button>
+			{:else}
+				<Button size="sm" color="secondary" onclick={handleDisconnect}>
+					{$t('tracking.disconnect')}
+				</Button>
+			{/if}
+		</div>
+	</FormGroup>
+
+	<FormGroup spacing="mb-2">
+		<div class="d-flex align-items-center gap-2">
+			<Label class="small mb-0">{$t('tracking.status')}</Label>
+			<Badge color={STATUS_COLOR[telemetryStore.status]}>
+				{$t(`tracking.status_${telemetryStore.status}`)}
+			</Badge>
+		</div>
+		{#if telemetryStore.error}
+			<small class="text-danger">{telemetryStore.error}</small>
+		{/if}
+	</FormGroup>
+
+	{#if telemetryStore.latest}
 		<FormGroup spacing="mb-2">
 			<Label class="small">{$t('points.lat')}</Label>
 			<InputGroup size="sm">
-			<Input type="text" value={telemetry.latitude ?? 'N/A'} readonly />
+				<Input type="text" value={telemetryStore.latest.latitude.toFixed(6)} readonly />
 			</InputGroup>
 		</FormGroup>
 
 		<FormGroup spacing="mb-2">
 			<Label class="small">{$t('points.lon')}</Label>
 			<InputGroup size="sm">
-			<Input type="text" value={telemetry.longitude ?? 'N/A'} readonly />
+				<Input type="text" value={telemetryStore.latest.longitude.toFixed(6)} readonly />
 			</InputGroup>
 		</FormGroup>
 
 		<FormGroup spacing="mb-2">
 			<Label class="small">{$t('points.alt')}</Label>
 			<InputGroup size="sm">
-			<Input type="text" value={telemetry.altitude ?? 'N/A'} readonly />
+				<Input type="text" value={telemetryStore.latest.altitude.toFixed(1)} readonly />
 			</InputGroup>
 		</FormGroup>
+
+		<small class="text-muted">
+			{$t('tracking.packetCount', { count: telemetryStore.points.length })}
+		</small>
+	{:else if telemetryStore.status !== 'idle'}
+		<small class="text-muted">{$t('tracking.waitingData')}</small>
+	{/if}
 </CollapsibleCard>

src/lib/features/tracking/index.ts

@@ -1 +1,2 @@
 export { default as TelemetryPanel } from './TelemetryPanel.svelte';
+export { telemetryStore, type TrackingStatus } from './telemetryStore.svelte';

src/lib/features/tracking/telemetryStore.svelte.ts

@@ -0,0 +1,99 @@
+import { telemetryApi, buildWsUrl, type RawTelemetryPacket } from '$api/telemetry';
+import { parseTelemetry, type TelemetryPoint, type Telemetry } from '$domain';
+
+export type TrackingStatus = 'idle' | 'connecting' | 'connected' | 'error';
+
+function toPoint(p: RawTelemetryPacket): TelemetryPoint {
+	return {
+		latitude: p.lat,
+		longitude: p.lon,
+		altitude: p.alt,
+		datetime: new Date(p.timestamp * 1000).toISOString(),
+		payload: JSON.stringify(p.payload),
+	};
+}
+
+class TelemetryStore {
+	satelliteId = $state('');
+	status = $state<TrackingStatus>('idle');
+	error = $state<string | null>(null);
+	points = $state<TelemetryPoint[]>([]);
+
+	#ws: WebSocket | null = null;
+
+	get latest(): TelemetryPoint | null {
+		return this.points[this.points.length - 1] ?? null;
+	}
+
+	get telemetry(): Telemetry | null {
+		if (this.points.length === 0) return null;
+		try {
+			return parseTelemetry(this.points);
+		} catch {
+			return null;
+		}
+	}
+
+	async connect(id: string): Promise<void> {
+		const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+		if (!UUID_RE.test(id)) {
+			this.status = 'error';
+			this.error = `Invalid satellite ID — expected a UUID (e.g. 550e8400-e29b-41d4-a716-446655440000)`;
+			return;
+		}
+
+		this.disconnect();
+		this.satelliteId = id;
+		this.status = 'connecting';
+		this.error = null;
+		this.points = [];
+
+		// Load historical packets first — non-fatal if it fails
+		try {
+			const history = await telemetryApi.fetchHistory(id);
+			// API returns newest-first; reverse to chronological order
+			this.points = [...history].reverse().map(toPoint);
+		} catch (e) {
+			console.warn('[telemetry] history fetch failed:', e);
+		}
+
+		const ws = new WebSocket(buildWsUrl(id));
+		this.#ws = ws;
+
+		ws.onopen = () => {
+			this.status = 'connected';
+		};
+
+		ws.onmessage = ({ data }) => {
+			try {
+				const packet = JSON.parse(data) as { error?: string } & RawTelemetryPacket;
+				if (!packet.error) {
+					this.points = [...this.points, toPoint(packet)];
+				}
+			} catch {
+				// ignore malformed frames
+			}
+		};
+
+		ws.onerror = () => {
+			this.status = 'error';
+			this.error = 'WebSocket connection failed';
+		};
+
+		ws.onclose = () => {
+			if (this.status !== 'idle') this.status = 'idle';
+			this.#ws = null;
+		};
+	}
+
+	disconnect(): void {
+		this.#ws?.close();
+		this.#ws = null;
+		this.status = 'idle';
+		this.satelliteId = '';
+		this.points = [];
+		this.error = null;
+	}
+}
+
+export const telemetryStore = new TelemetryStore();

src/lib/i18n/locales/en.json

@@ -163,6 +163,19 @@
 		"header": "Coordinate select mode",
 		"body": "Click the map to pick coordinates"
 	},
+	"tracking": {
+		"satelliteId": "Satellite ID",
+		"satelliteIdPlaceholder": "Enter satellite UUID...",
+		"connect": "Connect",
+		"disconnect": "Disconnect",
+		"status": "Status",
+		"status_idle": "Idle",
+		"status_connecting": "Connecting",
+		"status_connected": "Connected",
+		"status_error": "Error",
+		"packetCount": "{count} packets received",
+		"waitingData": "Waiting for data..."
+	},
 	"forecast": {
 		"success": "Forecast request",
 		"successBody": "Forecast request successful!",

src/lib/i18n/locales/ru.json

@@ -163,6 +163,19 @@
 		"header": "Режим выбора координат",
 		"body": "Кликните на карту, чтобы выбрать координаты"
 	},
+	"tracking": {
+		"satelliteId": "ID спутника",
+		"satelliteIdPlaceholder": "Введите UUID спутника...",
+		"connect": "Подключиться",
+		"disconnect": "Отключиться",
+		"status": "Статус",
+		"status_idle": "Ожидание",
+		"status_connecting": "Подключение",
+		"status_connected": "Подключено",
+		"status_error": "Ошибка",
+		"packetCount": "Получено пакетов: {count}",
+		"waitingData": "Ожидание данных..."
+	},
 	"forecast": {
 		"success": "Запрос прогноза",
 		"successBody": "Запрос прогноза успешно выполнен!",

src/routes/track/+page.svelte

@@ -1,20 +1,78 @@
 <script lang="ts">
-	import { onMount } from 'svelte';
+	import { onMount, onDestroy } from 'svelte';
-	import { Map as MapView } from '$map';
+	import { Map as MapView, plotAnimatedMarker, type IMap } from '$map';
 	import { Navbar } from '$features/auth';
 	import { PanelContainer } from '$ui';
-	import { TelemetryPanel } from '$features/tracking';
+	import { TelemetryPanel, telemetryStore } from '$features/tracking';
 	import { requireAuthenticated } from '$auth';
+	import { parseTelemetry } from '$domain';
+
+	let map = $state<IMap | null>(null);
+	// Tracks whether we've already fitted the map to the initial history load.
+	// Not reactive — written as a side effect inside $effect to avoid re-triggering.
+	let fittedBounds = false;
 
 	onMount(() => {
 		requireAuthenticated('/login');
 	});
+
+	onDestroy(() => {
+		map?.disposeScene('telemetry');
+	});
+
+	function onMapReady(m: IMap) {
+		map = m;
+	}
+
+	$effect(() => {
+		if (!map) return;
+
+		const points = telemetryStore.points;
+		const scene = map.scene('telemetry');
+
+		if (points.length === 0) {
+			scene.clear();
+			fittedBounds = false;
+			return;
+		}
+
+		let telemetry;
+		try {
+			telemetry = parseTelemetry(points);
+		} catch {
+			return;
+		}
+
+		const latest = points[points.length - 1];
+
+		scene.clear();
+
+		scene.addLine('path', {
+			coords: telemetry.flight_path,
+			color: '#FF1744',
+			width: 3,
+		});
+
+		scene.addMarker('launch', {
+			lngLat: [telemetry.launch.latlng.lng, telemetry.launch.latlng.lat],
+			iconUrl: '/target-blue.png',
+			iconSize: [12, 12],
+			popupHtml: `<b>Launch</b><br>${telemetry.launch.latlng.lat.toFixed(6)}, ${telemetry.launch.latlng.lng.toFixed(6)}`,
+		});
+
+		plotAnimatedMarker(scene, latest.longitude, latest.latitude);
+
+		if (!fittedBounds && telemetry.flight_path.length > 0) {
+			map.fitBounds(telemetry.flight_path, 50);
+			fittedBounds = true;
+		}
+	});
 </script>
 
 <main>
 	<Navbar />
 	<div style="height: var(--navbar-height);"></div>
-	<MapView>
+	<MapView {onMapReady}>
 		<PanelContainer position="left">
 			<TelemetryPanel />
 		</PanelContainer>