PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-17:12:30
G02     203.2          30.4               12.6 +/-    1.24      21.8 +/-    1.24  0.170 / 0.110
G06     158.3          67.8               12.3 +/-    0.33      13.2 +/-    0.33  0.100 / 0.100
G12     307.3          16.5                9.8 +/-    3.64      23.4 +/-    3.64  0.260 / 0.270
G17     33.9           50.9               10.2 +/-    0.95      12.7 +/-    0.95  0.110 / 0.210
G19     347.4          67.5                9.8 +/-    0.54      10.6 +/-    0.54  0.040 / 0.030
G24     299.4          37.8               10.2 +/-    1.51      15.5 +/-    1.51  0.040 / 0.030
G28     100.0          32.9               11.2 +/-    1.17      18.5 +/-    1.17  0.030 / 0.040