International Laser Ranging Service

Target entity: International Laser Ranging Service
Context triple: [International Earth Rotation and Reference Systems Service, cooperatesWith, International Laser Ranging Service]

• A. International Earth Rotation and Reference Systems Service
  The International Earth Rotation and Reference Systems Service (IERS) is an international organization that monitors Earth's rotation and maintains global reference systems used for precise timekeeping, navigation, and geodesy.
• B. GRACE mission
  The GRACE mission is a joint NASA–German Aerospace Center satellite project that precisely measures Earth's gravity field over time to study changes in ice sheets, sea level, groundwater, and other aspects of the global water cycle.
• C. Deep Space Network
  The Deep Space Network is NASA’s global system of large radio antennas used to track, communicate with, and receive data from distant spacecraft throughout the solar system and beyond.
• D. Canberra Deep Space Communications Complex
  The Canberra Deep Space Communications Complex is a NASA-affiliated ground station in Australia that tracks and communicates with interplanetary spacecraft as part of the Deep Space Network.
• E. National Astronomy and Ionosphere Center
  The National Astronomy and Ionosphere Center was a U.S. research organization best known for operating the Arecibo Observatory and conducting pioneering work in radio astronomy and atmospheric science.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: International Laser Ranging Service
Target entity description: The International Laser Ranging Service is an international organization that coordinates and supports satellite and lunar laser ranging activities to improve global reference frames, Earth science, and geodetic research.

• A. International Earth Rotation and Reference Systems Service
  The International Earth Rotation and Reference Systems Service (IERS) is an international organization that monitors Earth's rotation and maintains global reference systems used for precise timekeeping, navigation, and geodesy.
• B. GRACE mission
  The GRACE mission is a joint NASA–German Aerospace Center satellite project that precisely measures Earth's gravity field over time to study changes in ice sheets, sea level, groundwater, and other aspects of the global water cycle.
• C. Deep Space Network
  The Deep Space Network is NASA’s global system of large radio antennas used to track, communicate with, and receive data from distant spacecraft throughout the solar system and beyond.
• D. Canberra Deep Space Communications Complex
  The Canberra Deep Space Communications Complex is a NASA-affiliated ground station in Australia that tracks and communicates with interplanetary spacecraft as part of the Deep Space Network.
• E. National Astronomy and Ionosphere Center
  The National Astronomy and Ionosphere Center was a U.S. research organization best known for operating the Arecibo Observatory and conducting pioneering work in radio astronomy and atmospheric science.
• F. None of above. chosen