PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-15:28:10
G01     70.6           32.9                9.5 +/-    0.72      15.7 +/-    0.72  0.030 / 0.040
G07     137.5          30.9               13.1 +/-    1.74      22.5 +/-    1.74  0.030 / 0.040
G11     53.3           30.2                8.4 +/-    0.75      14.7 +/-    0.75  0.040 / 0.060
G13     274.1          37.6               11.6 +/-    1.00      17.5 +/-    1.00  0.040 / 0.050
G15     304.6          14.0                7.8 +/-    1.76      19.9 +/-    1.76  0.070 / 0.100
G17     233.6          69.1               11.7 +/-    1.53      12.4 +/-    1.53  0.070 / 0.100
G18     48.7           18.0                7.4 +/-    0.69      17.1 +/-    0.69  0.050 / 0.090
G19     224.1          39.3               12.7 +/-    1.38      18.8 +/-    1.38  0.040 / 0.110
G28     19.6           59.3               10.6 +/-    0.56      12.1 +/-    0.56  0.060 / 0.140
G30     135.7          62.6               12.6 +/-    0.41      14.0 +/-    0.41  0.060 / 0.130