PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-14:43:10
G01     68.4           32.6                8.5 +/-    1.12      14.1 +/-    1.12  0.040 / 0.030
G07     138.6          29.1                9.5 +/-    1.43      17.0 +/-    1.43  0.040 / 0.030
G11     51.9           28.6                8.3 +/-    1.31      14.9 +/-    1.31  0.110 / 0.090
G13     271.6          37.4                8.7 +/-    3.43      13.2 +/-    3.43  0.090 / 0.100
G15     303.3          14.2                5.9 +/-    1.74      14.9 +/-    1.74  0.050 / 0.080
G17     237.8          71.4               11.9 +/-    0.69      12.5 +/-    0.69  0.060 / 0.080
G18     47.2           16.9                8.1 +/-    2.95      19.2 +/-    2.95  0.060 / 0.100
G19     225.5          40.7               10.9 +/-    1.56      15.6 +/-    1.56  0.060 / 0.120
G28     22.9           58.9               10.5 +/-    2.31      12.1 +/-    2.31  0.270 / 0.180
G30     137.7          61.0               11.0 +/-    0.42      12.3 +/-    0.42  0.160 / 0.250