PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-04:28:00
G01     96.4           30.0                8.3 +/-    1.03      14.6 +/-    1.03  0.040 / 0.040
G07     120.6          47.9                8.0 +/-    0.33      10.4 +/-    0.33  0.040 / 0.050
G11     73.1           40.9                6.2 +/-    1.33       8.9 +/-    1.33  0.040 / 0.050
G13     300.2          34.5                5.2 +/-    1.31       8.4 +/-    1.31  0.050 / 0.050
G17     209.7          50.9                7.3 +/-    0.77       9.1 +/-    0.77  0.030 / 0.020
G19     212.3          20.1                4.9 +/-    2.42      10.8 +/-    2.42  0.030 / 0.040
G28     333.5          61.6                5.0 +/-    0.40       5.6 +/-    0.40  0.070 / 0.090
G30     73.3           80.2                5.5 +/-    0.63       5.5 +/-    0.63  0.060 / 0.120