PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-13:27:50
G01     65.3           32.0                6.7 +/-    0.56      11.3 +/-    0.56  0.040 / 0.040
G07     140.0          26.5                7.9 +/-    1.34      15.0 +/-    1.34  0.040 / 0.040
G11     50.0           26.3                6.5 +/-    2.04      12.3 +/-    2.04  0.050 / 0.070
G13     268.0          36.8                6.6 +/-    1.36      10.1 +/-    1.36  0.050 / 0.080
G15     301.5          14.3                2.0 +/-    2.21       5.0 +/-    2.21  0.060 / 0.080
G17     245.6          74.6                7.6 +/-    0.59       7.9 +/-    0.59  0.070 / 0.070
G18     45.1           15.2                5.2 +/-    2.14      12.9 +/-    2.14  0.060 / 0.120
G19     227.6          42.7                6.8 +/-    1.31       9.5 +/-    1.31  0.070 / 0.120
G28     27.4           58.2                5.8 +/-    0.74       6.7 +/-    0.74  0.120 / 0.410
G30     140.3          58.9                7.6 +/-    0.71       8.7 +/-    0.71  0.160 / 0.290