PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-14:57:50
G01     65.3           32.0                6.8 +/-    1.65      11.5 +/-    1.65  0.040 / 0.040
G07     140.0          26.7                8.8 +/-    0.92      16.5 +/-    0.92  0.040 / 0.040
G11     50.3           26.7                4.4 +/-    2.06       8.3 +/-    2.06  0.050 / 0.110
G13     268.1          36.8                6.9 +/-    2.06      10.6 +/-    2.06  0.050 / 0.120
G15     300.8          14.7                3.5 +/-    2.47       8.8 +/-    2.47  0.070 / 0.090
G17     244.3          73.5                9.0 +/-    0.44       9.3 +/-    0.44  0.060 / 0.070
G18     45.2           15.4                6.0 +/-    2.55      14.8 +/-    2.55  0.070 / 0.110
G19     227.7          43.2                8.9 +/-    1.91      12.3 +/-    1.91  0.070 / 0.110
G28     27.6           58.1                7.4 +/-    1.66       8.5 +/-    1.66  0.120 / 0.350
G30     140.2          58.3                9.0 +/-    0.40      10.4 +/-    0.40  0.120 / 0.240