PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-15:43:00
G01     65.3           32.0               12.5 +/-    1.49      21.0 +/-    1.49  0.040 / 0.030
G07     140.0          26.7               12.7 +/-    1.22      23.9 +/-    1.22  0.050 / 0.030
G11     50.4           26.9                9.7 +/-    1.80      18.1 +/-    1.80  0.060 / 0.120
G13     268.2          36.8               11.9 +/-    1.98      18.2 +/-    1.98  0.050 / 0.110
G15     300.5          14.9                8.9 +/-    1.43      22.2 +/-    1.43  0.080 / 0.100
G17     243.7          72.9               14.4 +/-    0.35      15.0 +/-    0.35  0.110 / 0.110
G18     45.3           15.5               11.0 +/-    2.08      27.0 +/-    2.08  0.140 / 0.270
G19     227.7          43.5               13.6 +/-    1.95      18.7 +/-    1.95  0.120 / 0.340
G28     27.7           58.1               13.9 +/-    1.40      16.1 +/-    1.40  0.080 / 0.070
G30     140.2          58.0               14.0 +/-    0.59      16.2 +/-    0.59  0.060 / 0.090