PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-12:43:10
G01     66.9           32.3                3.6 +/-    1.52       6.1 +/-    1.52  0.040 / 0.030
G07     139.2          27.8                4.6 +/-    0.66       8.5 +/-    0.66  0.040 / 0.030
G11     50.7           27.1                2.8 +/-    1.51       5.2 +/-    1.51  0.040 / 0.100
G13     269.8          37.2                3.2 +/-    2.76       4.9 +/-    2.76  0.080 / 0.100
G15     303.1          13.9               -0.2 +/-    1.36      -0.5 +/-    1.36  0.060 / 0.110
G17     242.1          74.0                4.2 +/-    0.67       4.3 +/-    0.67  0.070 / 0.160
G18     46.0           16.0                3.2 +/-    1.63       7.7 +/-    1.63  0.050 / 0.060
G19     226.3          41.2                3.5 +/-    1.35       5.0 +/-    1.35  0.070 / 0.080
G28     24.8           58.6                2.2 +/-    2.36       2.5 +/-    2.36  0.220 / 0.320
G30     139.0          60.6                4.4 +/-    1.09       5.0 +/-    1.09  0.120 / 0.230