PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-13:43:10
G01     65.5           32.0                6.0 +/-    1.59      10.1 +/-    1.59  0.040 / 0.040
G07     139.9          26.7                6.7 +/-    1.34      12.6 +/-    1.34  0.040 / 0.030
G11     50.2           26.5                4.4 +/-    1.75       8.3 +/-    1.75  0.070 / 0.110
G13     268.3          36.9                6.5 +/-    2.27      10.0 +/-    2.27  0.060 / 0.100
G15     301.6          14.4                4.3 +/-    1.80      10.8 +/-    1.80  0.030 / 0.040
G17     244.9          74.3                8.3 +/-    0.39       8.6 +/-    0.39  0.040 / 0.040
G18     45.2           15.4                4.8 +/-    1.66      11.8 +/-    1.66  0.050 / 0.060
G19     227.4          42.7                7.5 +/-    2.04      10.5 +/-    2.04  0.090 / 0.080
G28     27.1           58.2                4.3 +/-    1.58       4.9 +/-    1.58  0.070 / 0.110
G30     140.1          58.9                7.4 +/-    0.47       8.5 +/-    0.47  0.130 / 0.120