PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-12:12:40
G01     84.2           32.8                2.4 +/-    1.31       4.1 +/-    1.31  0.020 / 0.030
G07     129.8          40.9                3.1 +/-    1.30       4.4 +/-    1.30  0.030 / 0.040
G11     61.9           36.4                2.3 +/-    0.38       3.5 +/-    0.38  0.050 / 0.060
G13     288.3          37.5                2.0 +/-    0.97       3.0 +/-    0.97  0.060 / 0.060
G17     218.3          60.6                2.9 +/-    0.49       3.3 +/-    0.49  0.080 / 0.090
G18     58.2           22.2                1.2 +/-    1.86       2.6 +/-    1.86  0.100 / 0.120
G19     217.2          28.0                3.6 +/-    1.65       6.6 +/-    1.65  0.060 / 0.180
G28     358.2          61.3                2.7 +/-    0.91       3.0 +/-    0.91  0.060 / 0.180
G30     116.2          74.2                4.2 +/-    1.28       4.4 +/-    1.28  0.080 / 0.110