Approximately how much do Block II GPS satellites weigh in final orbit?

Approximately how much do Block II GPS satellites weigh in final orbit?

• A. 1000 kg
• B. 350 kg
• C. 500 kg
• D. 845 kg

Answer: (D)

Block II GPS satellites have a relatively compact bus, and their on‑orbit mass after deployment is around 845 kilograms. This reflects the mass that remains aboard once the satellite reaches its final orbit and uses some propellant for maneuvers, leaving roughly eight to nine hundred kilograms on orbit. The other options are either noticeably lighter or heavier than the documented on‑orbit mass for this satellite class, so 845 kg best matches the actual payload and propulsion mass retained in final orbit.

Block II GPS satellites have a relatively compact bus, and their on‑orbit mass after deployment is around 845 kilograms. This reflects the mass that remains aboard once the satellite reaches its final orbit and uses some propellant for maneuvers, leaving roughly eight to nine hundred kilograms on orbit. The other options are either noticeably lighter or heavier than the documented on‑orbit mass for this satellite class, so 845 kg best matches the actual payload and propulsion mass retained in final orbit.