PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-02:43:20
G01     110.8          23.2                7.1 +/-    1.30      14.4 +/-    1.30  0.030 / 0.040
G07     102.6          58.5                6.0 +/-    0.47       6.9 +/-    0.47  0.030 / 0.040
G08     41.9           21.2                2.7 +/-    0.94       5.7 +/-    0.94  0.040 / 0.050
G09     174.6          16.1                5.4 +/-    1.38      13.2 +/-    1.38  0.050 / 0.050
G11     91.9           42.3                6.1 +/-    0.40       8.5 +/-    0.40  0.070 / 0.240
G13     312.2          26.6                2.5 +/-    1.21       4.7 +/-    1.21  0.070 / 0.240
G17     203.1          36.4                6.6 +/-    1.17      10.2 +/-    1.17  0.060 / 0.180
G18     80.5           22.7                2.5 +/-    0.75       5.1 +/-    0.75  0.060 / 0.210
G28     305.4          59.1                4.5 +/-    1.06       5.2 +/-    1.06  0.030 / 0.030
G30     3.3            75.2                4.2 +/-    0.54       4.4 +/-    0.54  0.030 / 0.030