PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-18:27:50
G01     102.4          27.9               14.8 +/-    1.40      27.1 +/-    1.40  0.090 / 0.120
G07     113.3          55.1               16.4 +/-    0.75      19.5 +/-    0.75  0.150 / 0.120
G08     41.9           18.5               11.5 +/-    1.12      26.2 +/-    1.12  0.040 / 0.030
G11     83.7           43.0               15.6 +/-    0.86      21.6 +/-    0.86  0.040 / 0.030
G13     305.9          31.2               14.0 +/-    1.28      24.0 +/-    1.28  0.040 / 0.040
G17     208.7          39.6               16.3 +/-    1.20      23.9 +/-    1.20  0.090 / 0.080
G18     75.7           24.8               14.9 +/-    1.99      29.2 +/-    1.99  0.090 / 0.130
G19     210.7          15.8               -0.3 +/-   12.82      -0.6 +/-   12.82  0.150 / 0.150
G28     327.6          61.6               13.4 +/-    0.65      15.1 +/-    0.65  0.090 / 0.060
G30     52.4           79.5               15.9 +/-    0.71      16.1 +/-    0.71  0.100 / 0.070