%           mjd      real      imag     sigma  (all in microas)
1983.1  45373.3   -213.30   -272.26     43.26
1984.1  45738.6   -227.40   -263.32     35.96
1985.1  46103.8   -210.00   -149.11     33.14
1986.1  46469.1   -163.42   -115.26     28.46
1987.1  46834.3   -165.78    -85.55     22.29
1988.1  47199.6   -174.92    -59.60     18.81
1989.1  47564.8   -165.66    -21.79     16.72
1990.1  47930.1   -155.05     18.48     15.36
1991.1  48295.3   -134.80     38.79     12.77
1992.1  48660.6   -123.93     28.84     10.33
1993.1  49025.8   -107.73     18.03      8.97
1994.1  49391.1   -102.41     21.96      8.47
1995.1  49756.3    -92.47     22.93      8.02
1996.1  50121.6    -83.64     15.49      7.49
1997.1  50486.8    -66.42      2.96      7.25
1998.1  50852.1    -42.51    -22.32      7.63
1999.1  51217.3    -13.50    -59.90      7.55
2000.1  51582.6     34.93    -58.74      6.89
2001.1  51947.8     57.60    -50.57      6.24
2002.1  52313.1     78.59    -38.28      6.04
2003.1  52678.3    111.19    -27.41      5.36
2004.1  53043.6    133.44     -7.12      5.13
2005.1  53408.8    145.52     20.84      4.85
2006.1  53774.1    155.11     55.38      4.86
2007.1  54139.3    149.40     79.28      4.89
2008.1  54504.6    152.28    102.81      5.09
2009.1  54869.8    153.81    126.09      5.35
2010.1  55235.1    145.51    156.40      5.66
2011.1  55600.3    134.73    172.05      5.89
2012.1  55965.6    115.70    190.93      6.26
2013.1  56330.8     93.16    156.49      6.45
2014.1  56696.1    105.21    150.29      6.41
2015.1  57061.3    109.45    155.54      6.18
2016.1  57426.6    107.20    145.53      6.44
2017.1  57791.8    105.92    138.55      7.00
2018.1  58157.1     91.08    134.90      7.80