PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-07:58:10
G01     58.0           29.7                4.9 +/-    1.81       8.7 +/-    1.81  0.040 / 0.040
G06     182.2          14.0                5.1 +/-    1.15      13.0 +/-    1.15  0.040 / 0.040
G07     143.1          19.6                5.9 +/-    1.97      13.0 +/-    1.97  0.110 / 0.180
G11     47.5           21.7                3.5 +/-    1.37       7.3 +/-    1.37  0.150 / 0.190
G13     261.9          34.2                6.5 +/-    1.31      10.4 +/-    1.31  0.030 / 0.020
G15     291.7          16.7                3.5 +/-    1.69       8.5 +/-    1.69  0.020 / 0.020
G17     273.8          78.7                7.1 +/-    0.48       7.2 +/-    0.48  0.120 / 0.230
G19     235.6          54.2                6.7 +/-    2.08       8.1 +/-    2.08  0.130 / 0.250
G28     40.2           55.6                4.2 +/-    2.17       5.0 +/-    2.17  0.050 / 0.070
G30     144.5          49.5                8.9 +/-    0.41      11.3 +/-    0.41  0.050 / 0.080