PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-19:27:50
G01     63.2           31.6               10.2 +/-    1.54      17.3 +/-    1.54  0.080 / 0.240
G07     141.0          25.3               14.0 +/-    0.90      27.1 +/-    0.90  0.110 / 0.230
G11     50.0           26.6                8.3 +/-    1.75      15.7 +/-    1.75  0.080 / 0.120
G13     266.2          36.1               13.9 +/-    1.07      21.7 +/-    1.07  0.080 / 0.130
G15     297.1          15.9               11.2 +/-    0.87      27.1 +/-    0.87  0.030 / 0.030
G17     245.8          71.6               13.3 +/-    1.14      14.0 +/-    1.14  0.030 / 0.030
G18     44.4           14.8                8.4 +/-    1.62      21.0 +/-    1.62  0.090 / 0.240
G19     229.7          46.5               13.6 +/-    2.40      17.9 +/-    2.40  0.080 / 0.230
G28     31.4           57.5               13.3 +/-    0.94      15.5 +/-    0.94  0.050 / 0.080
G30     141.5          54.5               12.8 +/-    0.78      15.4 +/-    0.78  0.080 / 0.080