Measurement of the solar system acceleration using the Earth scale factor

Understand

We propose an alternative method to detect the secular aberration drift induced by the solar system acceleration due to the attraction to the Galaxy centre.

• This method is free of the individual radio source proper motion caused by intrinsic structure variation.
• We developed a procedure to estimate the scale factor directly from very long baseline interferometry (VLBI) data analysis in a source-wise mode within a global solution.
• The scale factor is estimated for each reference radio source individually as a function of astrometric coordinates (right ascension and declination).