GPS satellites operate in a circular orbit at an altitude of approximately 20,000 km. At the end of the satellite's operational lifetime, it is supposed to perform an orbit raise maneuver to place it into a graveyard orbit. This is done to get the spacecraft out of the way and help mitigate the orbit debris issues discussed in class. The graveyard orbit is a circular orbit 300 km above GEO. For a satellite with the following properties: Isp - 275 s IMF -0.1 Payload mass = 300 kg Operational orbit = 20,000 km altitude circular orbit at Earth a. (10 pts) Calculate the total velocity required to achieve the graveyard orbit (AV grave). Assume a Hohmann transfer is used for this maneuver (2 burns). b. (10 pts) Calculate the propellant mass (mprop) required for the graveyard orbit maneuver. GPS satellites operate in a circular orbit at an altitude of approximately 20,000 km. At the end of the satellite's operational lifetime, it is supposed to perform an orbit raise maneuver to place it into a graveyard orbit. This is done to get the spacecraft out of the way and help mitigate the orbit debris issues discussed in class. The graveyard orbit is a circular orbit 300 km above GEO. For a satellite with the following properties: Isp - 275 s IMF -0.1 Payload mass = 300 kg Operational orbit = 20,000 km altitude circular orbit at Earth a. (10 pts) Calculate the total velocity required to achieve the graveyard orbit (AV grave). Assume a Hohmann transfer is used for this maneuver (2 burns). b. (10 pts) Calculate the propellant mass (mprop) required for the graveyard orbit maneuver