PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-08:57:40
G01     113.7          21.6                7.4 +/-    0.94      15.6 +/-    0.94  0.050 / 0.240
G07     95.7           61.6                5.1 +/-    0.44       5.7 +/-    0.44  0.060 / 0.230
G08     42.8           24.9                2.2 +/-    1.41       4.3 +/-    1.41  0.040 / 0.060
G09     175.4          19.4                5.7 +/-    1.44      12.8 +/-    1.44  0.060 / 0.070
G11     97.5           40.6                6.2 +/-    0.47       8.9 +/-    0.47  0.080 / 0.110
G13     315.6          22.2               -0.0 +/-    1.34      -0.1 +/-    1.34  0.070 / 0.120
G17     202.7          32.8                6.3 +/-    1.18      10.5 +/-    1.18  0.030 / 0.030
G28     305.0          59.5                3.3 +/-    0.58       3.7 +/-    0.58  0.030 / 0.040
G30     357.6          72.7                3.4 +/-    1.21       3.5 +/-    1.21  0.060 / 0.080