PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-21:27:50
G01     94.0           30.9               18.3 +/-    1.69      31.4 +/-    1.69  0.180 / 0.590
G07     122.2          48.9               19.6 +/-    0.43      25.0 +/-    0.43  0.260 / 0.280
G08     42.3           14.2               11.2 +/-    4.66      28.3 +/-    4.66  0.130 / 0.120
G11     74.8           42.0               16.5 +/-    0.94      23.2 +/-    0.94  0.070 / 0.080
G13     298.6          34.5               15.9 +/-    2.88      25.4 +/-    2.88  0.070 / 0.080
G17     213.2          45.9               20.6 +/-    0.59      27.4 +/-    0.59  0.030 / 0.040
G18     67.8           24.6               14.5 +/-    1.24      28.7 +/-    1.24  0.080 / 0.130
G19     213.3          23.5               22.9 +/-    2.11      46.4 +/-    2.11  0.090 / 0.120
G28     343.5          61.9               17.2 +/-    0.68      19.2 +/-    0.68  0.040 / 0.030
G30     96.7           76.1               19.2 +/-    0.54      19.7 +/-    0.54  0.030 / 0.030