PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-05:43:00
G01     87.2           32.4                4.5 +/-    1.69       7.4 +/-    1.69  0.060 / 0.040
G07     127.7          42.8                7.5 +/-    0.98      10.5 +/-    0.98  0.040 / 0.040
G11     66.6           38.6                4.2 +/-    1.24       6.3 +/-    1.24  0.200 / 0.240
G13     293.1          35.8                4.6 +/-    1.76       7.1 +/-    1.76  0.190 / 0.250
G15     313.3          11.5                2.3 +/-    2.61       6.2 +/-    2.61  0.050 / 0.020
G17     216.6          57.1                7.8 +/-    0.88       9.1 +/-    0.88  0.050 / 0.040
G19     215.8          30.6                5.9 +/-    2.69      10.3 +/-    2.69  0.080 / 0.090
G28     355.6          61.4                3.4 +/-    0.93       3.8 +/-    0.93  0.090 / 0.090
G30     112.8          72.5                6.8 +/-    1.15       7.1 +/-    1.15  0.040 / 0.050