PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-20:27:50
G01     88.9           32.2               14.7 +/-    0.92      24.6 +/-    0.92  0.120 / 0.560
G07     126.5          45.0               16.3 +/-    1.00      21.9 +/-    1.00  0.120 / 0.500
G11     68.8           40.2               13.4 +/-    0.96      19.4 +/-    0.96  0.070 / 0.120
G13     293.5          36.1               13.6 +/-    1.41      21.2 +/-    1.41  0.080 / 0.100
G15     314.6          10.5               -5.9 +/-   24.00     -16.3 +/-   24.00  0.030 / 0.060
G17     216.2          50.3               17.3 +/-    1.78      21.8 +/-    1.78  0.030 / 0.060
G18     63.1           23.9               11.7 +/-    0.69      23.4 +/-    0.69  0.060 / 0.090
G19     215.3          27.2               15.2 +/-    1.53      28.3 +/-    1.53  0.060 / 0.080
G28     352.2          61.6               12.2 +/-    0.94      13.7 +/-    0.94  0.040 / 0.070
G30     110.0          73.7               14.7 +/-    0.95      15.2 +/-    0.95  0.040 / 0.060