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                6.5 +/-    0.72      11.3 +/-    0.72  0.050 / 0.060
G07     120.6          47.9                7.1 +/-    0.85       9.1 +/-    0.85  0.050 / 0.050
G11     73.1           40.9                7.2 +/-    0.82      10.3 +/-    0.82  0.060 / 0.120
G13     300.2          34.5                6.5 +/-    1.99      10.4 +/-    1.99  0.050 / 0.120
G17     209.7          50.9                8.4 +/-    1.37      10.5 +/-    1.37  0.060 / 0.170
G18     66.1           23.2                4.1 +/-    0.99       8.5 +/-    0.99  0.060 / 0.180
G19     212.3          20.1                5.0 +/-    2.22      11.1 +/-    2.22  0.060 / 0.110
G28     333.5          61.6                4.9 +/-    0.63       5.5 +/-    0.63  0.050 / 0.130
G30     73.3           80.2                7.1 +/-    0.26       7.2 +/-    0.26  0.040 / 0.040