Context: Compass-M1 is an experimental satellite launched for signal testing and validation and for the frequency filing on 14 April 2007. The role of Compass-M1 for Compass is similar to the role of the GIOVE satellites for the Galileo system. The orbit of Compass-M1 is nearly circular, has an altitude of 21,150 km and an inclination of 55.5 degrees.

Question: When was the Compass-M1 satellite launched?
Answer: 14 April 2007

Question: What is the purpose of the Compass-M1 satellite?
Answer: for signal testing and validation and for the frequency filing

Question: The purpose of the Compass-M1 satellite is similar to the purpose of what other satellite?
Answer: the GIOVE satellites for the Galileo system

Question: What is the altitude of the Compass-M1 satellite?
Answer: 21,150 km

Question: What is the inclination of the Compass-M1 satellite?
Answer: 55.5 degrees

Question: Compass-L1 is an experimental satellite launched during which month of 2007?
Answer: Unanswerable

Question: Compass-L1 is an experimental satellite launched during which year?
Answer: Unanswerable

Question: Compass-L1 is an experimental satellite launched on what day?
Answer: Unanswerable

Question: What satellites role is the Compass-L3 similar to?
Answer: Unanswerable

Question: Compass M-1 has a square orbit and an altitude of how many KM?
Answer: Unanswerable