International VLBI Service for Geodesy and Astrometry

Target entity: International VLBI Service for Geodesy and Astrometry
Context triple: [International Earth Rotation and Reference Systems Service, cooperatesWith, International VLBI Service for Geodesy and Astrometry]

• A. Very Long Baseline Interferometry
  Very Long Baseline Interferometry is a radio astronomy technique that combines signals from widely separated antennas to achieve extremely high angular resolution and precisely measure geodetic and astronomical parameters.
• B. Very Long Baseline Array
  The Very Long Baseline Array is a continent-spanning network of ten radio telescopes used for high-resolution astronomical observations through very long baseline interferometry.
• C. 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.
• D. 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.
• E. Joint ALMA Observatory
  The Joint ALMA Observatory is the international organization responsible for managing and operating the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope facility in Chile.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: International VLBI Service for Geodesy and Astrometry
Target entity description: The International VLBI Service for Geodesy and Astrometry is an international organization that coordinates Very Long Baseline Interferometry observations to provide precise measurements of Earth’s rotation, reference frames, and celestial positions.

• A. Very Long Baseline Interferometry
  Very Long Baseline Interferometry is a radio astronomy technique that combines signals from widely separated antennas to achieve extremely high angular resolution and precisely measure geodetic and astronomical parameters.
• B. Very Long Baseline Array
  The Very Long Baseline Array is a continent-spanning network of ten radio telescopes used for high-resolution astronomical observations through very long baseline interferometry.
• C. 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.
• D. 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.
• E. Joint ALMA Observatory
  The Joint ALMA Observatory is the international organization responsible for managing and operating the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope facility in Chile.
• F. None of above. chosen