PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-22:57:30
G07     355.7          64.7               11.8 +/-    0.85      12.9 +/-    0.85  0.060 / 0.120
G08     78.5           52.9               11.0 +/-    1.40      13.4 +/-    1.40  0.050 / 0.100
G09     183.3          59.9               13.7 +/-    1.18      15.6 +/-    1.18  0.030 / 0.060
G11     139.1          21.0               15.0 +/-    4.44      32.2 +/-    4.44  0.040 / 0.040
G23     158.5          26.5               11.4 +/-    1.68      21.6 +/-    1.68  0.070 / 0.190
G27     44.2           22.6                9.2 +/-    2.94      19.0 +/-    2.94  0.140 / 0.110
G28     250.1          40.4               11.6 +/-    1.79      16.7 +/-    1.79  0.050 / 0.120
G30     316.6          48.1                9.9 +/-    1.12      12.8 +/-    1.12  0.090 / 0.110