PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-18:42:40
G02     202.9          31.2               12.5 +/-    2.55      21.4 +/-    2.55  0.210 / 0.310
G06     159.2          67.6               12.4 +/-    0.31      13.3 +/-    0.31  0.120 / 0.250
G12     307.0          15.7                9.1 +/-    2.37      22.3 +/-    2.37  0.080 / 0.080
G17     32.8           51.8               11.5 +/-    1.18      14.2 +/-    1.18  0.110 / 0.090
G19     348.8          67.4               11.3 +/-    0.40      12.1 +/-    0.40  0.040 / 0.040
G24     299.7          37.5               11.0 +/-    1.30      16.6 +/-    1.30  0.060 / 0.050
G28     100.1          32.8               11.6 +/-    1.28      19.1 +/-    1.28  0.050 / 0.030