PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-21:12:50
G01     39.4           13.5                9.1 +/-    0.75      23.4 +/-    0.75  0.120 / 0.370
G02     199.3          12.2               17.5 +/-    1.86      46.5 +/-    1.86  0.080 / 0.370
G06     173.3          44.1               16.0 +/-    0.98      21.9 +/-    0.98  0.080 / 0.180
G13     234.7          19.4               16.1 +/-    2.29      36.0 +/-    2.29  0.080 / 0.180
G15     267.9          10.9               11.6 +/-    1.64      31.7 +/-    1.64  0.050 / 0.080
G17     0.7            69.5               13.1 +/-    0.95      13.9 +/-    0.95  0.040 / 0.090
G19     286.1          69.6               12.3 +/-    0.54      13.0 +/-    0.54  0.160 / 0.300
G24     315.1          22.6                8.4 +/-    1.19      17.5 +/-    1.19  0.140 / 0.350
G28     76.9           44.7               12.9 +/-    0.63      17.5 +/-    0.63  0.100 / 0.180
G30     155.3          22.9               14.9 +/-    2.02      30.6 +/-    2.02  0.100 / 0.160