PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-03:27:50
G01     91.8           31.5                6.4 +/-    1.31      10.9 +/-    1.31  0.040 / 0.040
G07     124.2          46.6                6.9 +/-    0.41       9.2 +/-    0.41  0.030 / 0.040
G11     72.0           40.9                4.7 +/-    1.01       6.7 +/-    1.01  0.040 / 0.040
G13     297.2          34.8                3.0 +/-    5.70       4.7 +/-    5.70  0.050 / 0.050
G17     213.7          52.2                5.5 +/-    0.68       6.7 +/-    0.68  0.040 / 0.040
G19     214.0          26.7                4.0 +/-    1.80       7.5 +/-    1.80  0.030 / 0.030
G28     348.0          61.7                3.0 +/-    0.49       3.4 +/-    0.49  0.080 / 0.090
G30     104.4          74.0                5.3 +/-    0.84       5.5 +/-    0.84  0.070 / 0.090