How to use mavsdk-python to takeoff without GPS about mavsdk-python HOT 4 OPEN

print("Setting initial setpoints...")
await drone.offboard.set_velocity_ned(
    VelocityNedYaw(0.0, 0.0, 0.0, 0.0))  

print("Starting offboard control...")
try:
    await drone.offboard.start()
except OffboardError as error:
    print(f"Starting offboard mode failed with error code: {error._result.result}")
    print("-- Disarming")
    await drone.action.disarm()
    return

print("Taking off manually...")
await drone.offboard.set_velocity_ned(
    VelocityNedYaw(0.0, 0.0, -1.0, 0.0))  # Ascend with -1.0 m/s velocity

await asyncio.sleep(5)

print("Hovering...")
await drone.offboard.set_velocity_ned(
    VelocityNedYaw(0.0, 0.0, 0.0, 0.0))  # Hover in place

await asyncio.sleep(10)

print("Landing manually...")
await drone.offboard.set_velocity_ned(
    VelocityNedYaw(0.0, 0.0, 1.0, 0.0))  # Descend with 1.0 m/s velocity

await asyncio.sleep(5)

print("Stopping offboard control...")
try:
    await drone.offboard.stop()
except OffboardError as error:
    print(f"Stopping offboard mode failed with error code: {error._result.result}")

print("Disarming...")
await drone.action.disarm()