PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-15:12:50
G01     66.0           32.2                8.6 +/-    1.68      14.5 +/-    1.68  0.040 / 0.040
G07     139.7          27.3               11.8 +/-    0.61      22.0 +/-    0.61  0.040 / 0.040
G11     50.7           27.2                6.3 +/-    1.73      11.7 +/-    1.73  0.060 / 0.110
G13     269.0          36.9               10.1 +/-    2.16      15.5 +/-    2.16  0.050 / 0.120
G15     301.3          14.7                5.7 +/-    1.14      14.3 +/-    1.14  0.060 / 0.080
G17     242.4          72.8               11.9 +/-    0.36      12.4 +/-    0.36  0.070 / 0.080
G18     45.7           15.8                7.8 +/-    2.71      19.0 +/-    2.71  0.070 / 0.110
G19     227.2          42.7               11.7 +/-    1.93      16.2 +/-    1.93  0.090 / 0.110
G28     26.5           58.3                8.4 +/-    1.59       9.7 +/-    1.59  0.140 / 0.310
G30     139.7          58.8               12.1 +/-    0.38      13.9 +/-    0.38  0.140 / 0.300