PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-20:42:50
G01     40.5           15.4               11.7 +/-    2.47      28.9 +/-    2.47  0.150 / 0.330
G06     173.8          41.5               18.1 +/-    0.91      25.7 +/-    0.91  0.220 / 0.250
G13     236.6          21.1               17.4 +/-    3.79      37.2 +/-    3.79  0.080 / 0.140
G15     270.2          11.7               16.4 +/-    4.25      44.0 +/-    4.25  0.080 / 0.150
G17     356.2          71.1               16.1 +/-    0.34      16.9 +/-    0.34  0.040 / 0.050
G19     278.4          68.5               16.3 +/-    0.72      17.3 +/-    0.72  0.050 / 0.070
G24     316.0          20.7               11.2 +/-    2.93      24.2 +/-    2.93  0.080 / 0.070
G28     73.7           46.0               14.7 +/-    1.54      19.6 +/-    1.54  0.060 / 0.060
G30     154.8          25.5               19.6 +/-    2.66      37.9 +/-    2.66  0.030 / 0.020