PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-06:28:10
G07     316.1          51.0                4.2 +/-    0.76       5.3 +/-    0.76  0.110 / 0.480
G08     117.9          45.4                8.9 +/-    1.14      11.9 +/-    1.14  0.130 / 0.560
G09     256.4          83.7                5.3 +/-    0.93       5.3 +/-    0.93  0.070 / 0.200
G16     42.5           23.1                2.8 +/-    0.97       5.7 +/-    0.97  0.080 / 0.190
G23     149.3          58.7                7.7 +/-    0.56       8.9 +/-    0.56  0.030 / 0.050
G27     69.6           36.0                4.6 +/-    0.89       7.2 +/-    0.89  0.030 / 0.060
G28     227.8          18.6                4.8 +/-    2.69      10.9 +/-    2.69  0.040 / 0.060
G30     290.4          25.5                6.3 +/-    1.18      12.2 +/-    1.18  0.040 / 0.050