PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-14:12:50
G01     106.9          25.6               10.0 +/-    1.26      19.3 +/-    1.26  0.020 / 0.020
G07     107.1          58.2               11.1 +/-    0.57      12.8 +/-    0.57  0.030 / 0.020
G08     41.8           19.6                8.1 +/-    1.56      18.0 +/-    1.56  0.040 / 0.030
G09     173.8          12.2               11.0 +/-    3.63      29.3 +/-    3.63  0.040 / 0.040
G11     88.0           42.6               10.3 +/-    1.15      14.3 +/-    1.15  0.100 / 0.140
G13     309.4          28.9                8.0 +/-    1.06      14.4 +/-    1.06  0.080 / 0.130
G17     205.9          38.0                9.7 +/-    1.45      14.6 +/-    1.45  0.070 / 0.150
G18     79.9           24.2               10.6 +/-    1.83      21.1 +/-    1.83  0.090 / 0.150
G28     318.0          61.0                8.3 +/-    0.89       9.3 +/-    0.89  0.090 / 0.110
G30     19.9           78.0               10.3 +/-    0.69      10.5 +/-    0.69  0.080 / 0.120