PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-15:28:00
G01     79.7           32.9                8.7 +/-    0.58      14.4 +/-    0.58  0.060 / 0.110
G07     132.4          34.4                8.8 +/-    1.13      14.2 +/-    1.13  0.080 / 0.110
G11     58.4           32.7                7.3 +/-    1.20      12.2 +/-    1.20  0.030 / 0.030
G13     286.5          36.7                9.0 +/-    2.15      13.8 +/-    2.15  0.030 / 0.060
G15     312.1          11.4                7.3 +/-    0.86      19.7 +/-    0.86  0.040 / 0.050
G17     222.5          64.6               12.2 +/-    0.80      13.3 +/-    0.80  0.040 / 0.050
G19     219.0          36.9               11.5 +/-    0.78      17.7 +/-    0.78  0.060 / 0.100
G28     5.5            60.6                9.1 +/-    0.54      10.3 +/-    0.54  0.050 / 0.110
G30     122.0          71.6                9.4 +/-    0.35       9.9 +/-    0.35  0.050 / 0.080