diff --git a/Server/src/models/api.app.ts b/Server/src/models/api.app.ts
index bb141a2..151c2f4 100644
--- a/Server/src/models/api.app.ts
+++ b/Server/src/models/api.app.ts
@@ -25,7 +25,8 @@ export const UpdateRequestApp = z.object({
 	vehicleId: z.number().int().nonnegative(), // vehicle id of user
 	pos: Position.optional(), // the current position of user
 	speed: z.number().optional(), // Speed in km/h
-	heading: z.number().optional() // Heading of the vehicle between 0 and 359
+	heading: z.number().optional(), // Heading of the vehicle between 0 and 359
+	timestamp: z.number().optional()  // Timestamp of GPS measurement in milliseconds since epoch
 })
 
 //================ new
diff --git a/Server/src/routes/vehicle.route.ts b/Server/src/routes/vehicle.route.ts
index ddc519b..df116d6 100644
--- a/Server/src/routes/vehicle.route.ts
+++ b/Server/src/routes/vehicle.route.ts
@@ -79,9 +79,11 @@ export class VehicleRoute {
 		if (
 			vehiclePayload.pos !== undefined &&
 			vehiclePayload.heading !== undefined &&
-			vehiclePayload.speed !== undefined
+			vehiclePayload.speed !== undefined &&
+			vehiclePayload.timestamp !== undefined
 		) {
-			await VehicleService.appendLog(userVehicle.uid, vehiclePayload.pos, vehiclePayload.heading, vehiclePayload.speed)
+			await VehicleService.appendLog(userVehicle.uid, vehiclePayload.pos, vehiclePayload.heading, vehiclePayload.speed,
+				new Date(vehiclePayload.timestamp))
 		}
 
 		const userVehicleData = await VehicleService.getVehicleData(userVehicle)
diff --git a/Server/src/services/vehicle.service.ts b/Server/src/services/vehicle.service.ts
index 58d9aa9..3adcfab 100644
--- a/Server/src/services/vehicle.service.ts
+++ b/Server/src/services/vehicle.service.ts
@@ -33,11 +33,32 @@ export type VehicleData = {
 /** Service for vehicle management. */
 export default class VehicleService {
 	/**
+	 * Search for vehicles on a track
+	 * @param track `Track` to search on for vehicles
+	 * @param type `VehicleType` to filter the returned vehicles by
+	 * @returns `Vehicle[]` of all vehicles on the given `track`
+	 */
+	public static async getAllVehiclesForTrack(track: Track, type?: VehicleType): Promise<Vehicle[]> {
+		// if no type is given, this is a simple forward
+		if (type == null) {
+			return database.vehicles.getAll(track.uid)
+		}
+
+		// get all vehicles for track and filter by type
+		const vehicles: Vehicle[] = await database.vehicles.getAll(track.uid)
+		const filteredVehicles = vehicles.filter(function (vehicle, _index, _vehicles) {
+			return vehicle.typeId == type.uid
+		})
+		return filteredVehicles
+	}
+
+  	/**
 	 * Append log for a given vehicle
 	 * @param vehicleId vehicle id to append the log for
 	 * @param position position of the vehicle
 	 * @param heading heading of the vehicle
 	 * @param speed speed of the vehicle
+   * @param timestamp timestamp of the gps position
 	 * @returns appended log if successful
 	 * @throws PrismaError, if appending log in the database was not possible
 	 */
@@ -45,10 +66,11 @@ export default class VehicleService {
 		vehicleId: number,
 		position: z.infer<typeof Position>,
 		heading: number,
-		speed: number
+		speed: number,
+		timestamp: Date
 	): Promise<Log> {
 		return await database.logs.save({
-			timestamp: new Date(),
+			timestamp,
 			vehicleId,
 			position: [position.lng, position.lat],
 			heading,
@@ -56,26 +78,6 @@ export default class VehicleService {
 		})
 	}
 
-	/**
-	 * Search for vehicles on a track
-	 * @param track `Track` to search on for vehicles
-	 * @param type `VehicleType` to filter the returned vehicles by
-	 * @returns `Vehicle[]` of all vehicles on the given `track`
-	 */
-	public static async getAllVehiclesForTrack(track: Track, type?: VehicleType): Promise<Vehicle[]> {
-		// if no type is given, this is a simple forward
-		if (type == null) {
-			return database.vehicles.getAll(track.uid)
-		}
-
-		// get all vehicles for track and filter by type
-		const vehicles: Vehicle[] = await database.vehicles.getAll(track.uid)
-		const filteredVehicles = vehicles.filter(function (vehicle, _index, _vehicles) {
-			return vehicle.typeId == type.uid
-		})
-		return filteredVehicles
-	}
-
 	/**
 	 * Compute all data (e.g. position, speed and heading) for a given vehicle
 	 * @param vehicle `Vehicle` to compute data for