PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-13:27:50
G01     259.6          38.5                7.6 +/-    2.68      11.4 +/-    2.68  0.060 / 0.090
G03     316.7          40.2                5.3 +/-    1.56       7.7 +/-    1.56  0.040 / 0.060
G10     134.3          10.1                9.1 +/-    2.63      25.2 +/-    2.63  0.080 / 0.110
G11     244.8          16.2                6.7 +/-    0.99      16.1 +/-    0.99  0.200 / 0.090
G14     49.7           47.7                5.2 +/-    0.93       6.8 +/-    0.93  0.100 / 0.040
G18     227.4          33.2                7.8 +/-    1.60      12.8 +/-    1.60  0.060 / 0.050
G22     309.9          64.8                6.7 +/-    0.57       7.3 +/-    0.57  0.150 / 0.320
G25     45.6           14.1                2.9 +/-    4.14       7.4 +/-    4.14  0.160 / 0.330
G31     43.9           63.4                6.1 +/-    0.47       6.7 +/-    0.47  0.030 / 0.040
G32     72.3           25.8                6.1 +/-    2.04      11.7 +/-    2.04  0.030 / 0.040