PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-22:27:50
G01     67.5           32.5               11.7 +/-    1.39      19.5 +/-    1.39  0.030 / 0.030
G07     139.1          28.9               15.1 +/-    1.18      27.0 +/-    1.18  0.040 / 0.030
G11     53.0           30.4               11.1 +/-    1.01      19.3 +/-    1.01  0.070 / 0.100
G13     271.4          36.9               14.3 +/-    2.49      22.0 +/-    2.49  0.100 / 0.110
G15     299.7          16.0               10.2 +/-    1.79      24.7 +/-    1.79  0.140 / 0.150
G17     236.7          67.2               14.5 +/-    0.42      15.6 +/-    0.42  0.190 / 0.220
G18     47.3           17.1               10.1 +/-    2.37      23.9 +/-    2.37  0.040 / 0.080
G19     226.5          44.1               15.6 +/-    2.13      21.3 +/-    2.13  0.050 / 0.060
G28     25.4           58.4               14.4 +/-    2.07      16.6 +/-    2.07  0.040 / 0.040
G30     138.1          56.6               15.2 +/-    0.63      17.8 +/-    0.63  0.040 / 0.050