PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-14:58:10
G01     71.4           33.0               10.0 +/-    0.84      16.5 +/-    0.84  0.030 / 0.040
G07     137.1          31.5               10.6 +/-    1.45      17.9 +/-    1.45  0.030 / 0.040
G11     53.6           30.5                9.8 +/-    0.58      16.9 +/-    0.58  0.050 / 0.090
G13     274.8          37.7               10.9 +/-    0.76      16.5 +/-    0.76  0.040 / 0.110
G15     305.3          13.8                6.2 +/-    1.29      16.0 +/-    1.29  0.050 / 0.130
G17     232.6          68.9               11.6 +/-    1.06      12.3 +/-    1.06  0.060 / 0.140
G18     49.2           18.2                8.5 +/-    1.15      19.6 +/-    1.15  0.040 / 0.060
G19     223.7          38.5               11.6 +/-    0.93      17.3 +/-    0.93  0.040 / 0.060
G28     18.4           59.5               10.3 +/-    0.28      11.8 +/-    0.28  0.050 / 0.090
G30     135.0          63.4               11.5 +/-    0.92      12.7 +/-    0.92  0.050 / 0.090