Analysis of information sources in references of the Wikipedia article "Airy-0" in English language version.
The origin of the longitude system for Mars is now defined by assigning a longitude of 47.95137° west to the Viking 1 lander.... The longitude uncertainty within which landed resources can be determined by radiometric tracking is now ... significantly smaller than the uncertainty of determining the center of the ~500 m diameter Airy-0, the time has come to transition the orientation of the longitude system from being based on Airy-0 to the much smaller Viking 1 lander, for which there are extensive radiometric tracking data.
The origin of the longitude system for Mars is now defined by assigning a longitude of 47.95137° west to the Viking 1 lander.... The longitude uncertainty within which landed resources can be determined by radiometric tracking is now ... significantly smaller than the uncertainty of determining the center of the ~500 m diameter Airy-0, the time has come to transition the orientation of the longitude system from being based on Airy-0 to the much smaller Viking 1 lander, for which there are extensive radiometric tracking data.
The origin of the longitude system for Mars is now defined by assigning a longitude of 47.95137° west to the Viking 1 lander.... The longitude uncertainty within which landed resources can be determined by radiometric tracking is now ... significantly smaller than the uncertainty of determining the center of the ~500 m diameter Airy-0, the time has come to transition the orientation of the longitude system from being based on Airy-0 to the much smaller Viking 1 lander, for which there are extensive radiometric tracking data.
