PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-02:42:50
G01     126.9          11.5              -18.4 +/-   21.14     -49.9 +/-   21.14  0.030 / 0.040
G07     59.2           68.4                4.7 +/-    0.26       5.0 +/-    0.26  0.030 / 0.040
G08     49.1           37.1                2.2 +/-    0.78       3.4 +/-    0.78  0.120 / 0.350
G09     176.6          34.5                8.2 +/-    1.76      13.1 +/-    1.76  0.110 / 0.350
G11     116.2          35.8                6.5 +/-    0.98      10.2 +/-    0.98  0.060 / 0.080
G13     320.9          12.1               -6.7 +/-   11.50     -17.8 +/-   11.50  0.050 / 0.060
G17     198.7          17.2                5.6 +/-    1.34      13.1 +/-    1.34  0.100 / 0.310
G18     100.2          16.6                6.0 +/-    1.70      14.4 +/-    1.70  0.110 / 0.350
G28     273.5          51.2                4.7 +/-    0.74       5.8 +/-    0.74  0.050 / 0.040
G30     331.0          59.5                2.7 +/-    1.30       3.1 +/-    1.30  0.050 / 0.040