Table:
text: Helmert transformation
Standard parameters
Standard parameters
Region Start_datum Target_datum c_x_Metre_ c_y_Metre c_z_Metre s_ppm_ r_x_Arcsecond_ r_y_Arcsecond_ r_z_Arcsecond_
Slovenia ETRS89 D48 D96 409.545 72.164 486.872 17.919665 −3.085957 −5.469110 11.020289
England , Scotland , Wales WGS84 OSGB36 −446.448 125.157 −542.06 20.4894 −0.1502 −0.247 −0.8421
Ireland WGS84 Ireland 1965 −482.53 130.596 −564.557 −8.15 1.042 0.214 0.631
Germany WGS84 DHDN −591.28 −81.35 −396.39 −9.82 1.4770 −0.0736 −1.4580
Germany WGS84 Bessel 1841 −582 −105 −414 −8.3 −1.04 −0.35 3.08
Germany WGS84 Krassovski 1940 −24 123 94 −1.1 −0.02 0.26 0.13
Austria (BEV) WGS84 MGI −577.326 −90.129 −463.920 −2.423 5.137 1.474 5.297

Question: How many values of rz (arcsecond) correspond to an ary (arcsecond) value of –0.247 in the Helmert transform?

Question: How many values of rz(arcsecond) are associated with a target date of Ireland 1965 for the Helmert transform?