PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-20:12:50
G01     48.9           24.7               12.9 +/-    0.86      25.3 +/-    0.86  0.180 / 0.300
G06     176.8          27.3               18.2 +/-    1.56      33.8 +/-    1.56  0.110 / 0.310
G07     146.8          11.5               20.4 +/-    5.64      55.2 +/-    5.64  0.110 / 0.290
G11     44.6           14.6               11.7 +/-    2.18      29.4 +/-    2.18  0.080 / 0.300
G13     249.1          29.6               15.2 +/-    1.44      27.0 +/-    1.44  0.040 / 0.070
G15     282.8          15.3               12.8 +/-    2.10      31.6 +/-    2.10  0.040 / 0.070
G17     306.3          77.6               15.5 +/-    0.94      15.8 +/-    0.94  0.110 / 0.410
G19     248.2          59.6               16.7 +/-    0.76      19.0 +/-    0.76  0.130 / 0.310
G28     55.0           52.2               14.4 +/-    0.34      17.8 +/-    0.34  0.060 / 0.080
G30     150.2          39.1               17.8 +/-    0.56      26.2 +/-    0.56  0.050 / 0.090