PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-13:28:00
G01     316.4          23.1                3.6 +/-    1.51       7.4 +/-    1.51  0.040 / 0.040
G10     89.2           49.7                3.3 +/-    1.04       4.2 +/-    1.04  0.040 / 0.040
G11     299.3          24.0                4.6 +/-    1.13       9.2 +/-    1.13  0.030 / 0.040
G14     310.6          70.2                3.8 +/-    0.68       4.0 +/-    0.68  0.030 / 0.040
G22     304.6          17.9                4.0 +/-    2.03       9.3 +/-    2.03  0.100 / 0.170
G25     96.3           11.4                7.8 +/-    2.00      21.0 +/-    2.00  0.190 / 0.120
G31     172.8          50.6                7.1 +/-    0.61       8.9 +/-    0.61  0.180 / 0.280
G32     20.8           61.8                4.2 +/-    0.63       4.7 +/-    0.63  0.140 / 0.200