PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-06:27:50
G01     111.5          23.0                7.0 +/-    1.23      14.4 +/-    1.23  0.050 / 0.050
G07     99.5           60.7                4.5 +/-    0.55       5.1 +/-    0.55  0.040 / 0.050
G08     42.5           23.5               11.7 +/-    0.81      23.6 +/-    0.81  0.030 / 0.030
G09     175.7          18.0                4.7 +/-    1.63      10.8 +/-    1.63  0.030 / 0.040
G11     95.5           41.5                5.6 +/-    0.63       7.9 +/-    0.63  0.070 / 0.130
G13     313.9          24.2                2.8 +/-    4.00       5.7 +/-    4.00  0.060 / 0.120
G17     203.7          34.6                6.3 +/-    2.41      10.0 +/-    2.41  0.060 / 0.070
G19     207.8          10.0               -3.4 +/-   12.20      -9.6 +/-   12.20  0.080 / 0.070
G28     310.0          60.2                3.5 +/-    0.56       3.9 +/-    0.56  0.100 / 0.190
G30     8.8            75.2                4.7 +/-    1.01       4.9 +/-    1.01  0.090 / 0.180