PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-10:58:00
G01     86.9           32.3                4.9 +/-    1.35       8.1 +/-    1.35  0.030 / 0.030
G07     127.9          41.2                6.3 +/-    1.40       9.0 +/-    1.40  0.030 / 0.030
G11     64.8           36.9                3.3 +/-    0.90       5.0 +/-    0.90  0.060 / 0.080
G13     293.7          35.5                5.2 +/-    1.61       8.2 +/-    1.61  0.070 / 0.080
G15     314.4          10.6               -4.4 +/-   18.49     -12.2 +/-   18.49  0.180 / 0.470
G17     216.4          58.7                9.0 +/-    1.31      10.4 +/-    1.31  0.160 / 0.410
G19     215.7          31.2                6.8 +/-    2.08      11.6 +/-    2.08  0.080 / 0.100
G28     355.2          61.4                6.4 +/-    0.93       7.1 +/-    0.93  0.090 / 0.110
G30     109.0          75.1                7.3 +/-    0.30       7.5 +/-    0.30  0.040 / 0.060