PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-19:43:10
G01     65.5           32.1               14.1 +/-    0.72      23.7 +/-    0.72  0.080 / 0.370
G07     140.0          27.2               16.3 +/-    1.68      30.4 +/-    1.68  0.110 / 0.430
G11     51.2           28.2               11.7 +/-    1.15      21.2 +/-    1.15  0.030 / 0.040
G13     268.8          36.7               17.1 +/-    1.11      26.3 +/-    1.11  0.040 / 0.050
G15     298.9          15.8               12.2 +/-    1.95      29.7 +/-    1.95  0.030 / 0.060
G17     240.7          69.7               16.6 +/-    0.92      17.6 +/-    0.92  0.030 / 0.060
G18     45.9           16.1               11.0 +/-    1.26      26.6 +/-    1.26  0.070 / 0.100
G19     227.9          44.7               19.3 +/-    2.37      26.1 +/-    2.37  0.080 / 0.130
G28     28.0           58.0               13.5 +/-    0.67      15.6 +/-    0.67  0.060 / 0.150
G30     139.8          56.4               16.1 +/-    1.22      18.9 +/-    1.22  0.070 / 0.190