Current Status of Amplitude Calibration in the EVN. --------------------------------------------------- The following table shows the median absolute amplitude error for EVN stations in for the last session of 2007 (October) and the first two sessions of 2008 (March and June). These results are derived from the pipeline amplitude self-calibration results of all EVN experiments recorded which have been pipelined to date. The number in brackets after each entry is the number of experiments that were used to determine the median error for that entry. Station 6cm 18cm 6GHz Cm 5(2)* 0.48(7) 0.13(3) Ef 0.06(8) 0.05(11) 0.04(6) Hh 0.17(6) 0.07(6) 0.04(2) Jb 0.13(8) 0.10(11) 0.06(6) Mc 0.07(10) 0.09(12) 0.04(6) Nt 0.09(10) 0.08(8) 0.07(6) On 0.11(8) 0.06(12) 0.06(6) Sh 0.07(2) 0.08(4) Tr 0.23(9) 0.09(11) 0.15(2) Ur 0.08(5) 0.08(7) Wb 0.05(10) 0.07(12) 0.10(6) Mh Ar 0.08(2) --------------------------------------------------------------------- The blank entries indicates insufficient data. The numbers above are the median absolute error in the antenna gain amplitude (as calculated from pipeline amplitude self calibration). A value above 0.1 indicates a significant error which should be investigated. In addition to the absolute errors summarised here, the EVN pipeline provides details on every experiment processed at JIVE including the sign and time variability of the errors. *CM: Only 2 experiments at c-band. In the first one, the pointing was affected by strong wind. In the second one, the station reported pointing problems. Points of note: Results are similar to those reported previously, but some worsening is noticed at 6 cm. L-band calibration seems to be good across the network. However, RFI seems to be the major source of errors at this band. Calibration at this frequency is quite variable with occasional experiments having quite large errors. However, most L-band experiments give good results at most stations. In general, 6 GHz calibration has shown neither considerable improvement nor worsening, though there is room for improvement. Cm still does not provide Tsys monitoring. It is still unclear which stations provide opacity corrected gain curves. Giuseppe Cimo' for the Science Operation and Support Group (JIVE)