Two satellites, \(A\) and \(B\), move in circular orbits around a planet of mass \(M\) and radius \(R\). Satellite \(A\) orbits at an altitude of \(R\) above the planet's surface, and satellite \(B\) orbits at an altitude of \(3R\) above the planet's surface. What is the ratio of the orbital speed of satellite \(A\) to the orbital speed of satellite \(B\), \(\dfrac{v_A}{v_B}\)?