PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-08:42:40
G01     111.4          23.0                5.5 +/-    0.87      11.3 +/-    0.87  0.040 / 0.060
G07     100.1          60.0                5.5 +/-    0.81       6.2 +/-    0.81  0.040 / 0.060
G08     42.3           22.9                2.0 +/-    1.20       4.1 +/-    1.20  0.090 / 0.080
G09     175.1          17.2                3.9 +/-    1.73       9.2 +/-    1.73  0.040 / 0.080
G11     94.3           41.1                5.5 +/-    0.54       7.9 +/-    0.54  0.030 / 0.040
G13     314.1          24.0                2.7 +/-    2.16       5.4 +/-    2.16  0.030 / 0.040
G17     203.6          35.2                5.8 +/-    1.73       9.2 +/-    1.73  0.070 / 0.130
G19     207.7          10.2               -2.3 +/-   11.75      -6.4 +/-   11.75  0.080 / 0.140
G28     309.8          60.1                5.0 +/-    0.65       5.7 +/-    0.65  0.070 / 0.170
G30     4.7            74.7                4.4 +/-    1.15       4.5 +/-    1.15  0.080 / 0.160