PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-14:58:00
G01     65.3           32.0                7.2 +/-    0.45      12.0 +/-    0.45  0.040 / 0.040
G07     140.0          26.7                9.7 +/-    1.64      18.3 +/-    1.64  0.040 / 0.040
G11     50.3           26.7                6.1 +/-    1.71      11.5 +/-    1.71  0.070 / 0.110
G13     268.1          36.8                9.0 +/-    1.36      13.8 +/-    1.36  0.070 / 0.090
G15     300.8          14.7                4.6 +/-    2.31      11.6 +/-    2.31  0.040 / 0.060
G17     244.3          73.5                8.8 +/-    0.92       9.2 +/-    0.92  0.030 / 0.050
G18     45.2           15.4                4.8 +/-    2.49      11.7 +/-    2.49  0.090 / 0.180
G19     227.7          43.2               11.3 +/-    0.73      15.7 +/-    0.73  0.070 / 0.200
G28     27.6           58.1                7.2 +/-    0.40       8.4 +/-    0.40  0.070 / 0.130
G30     140.2          58.3                8.0 +/-    0.90       9.3 +/-    0.90  0.040 / 0.110