PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-20:57:50
G01     38.5           11.7               10.5 +/-    4.07      28.2 +/-    4.07  0.030 / 0.040
G02     199.5          14.4               18.4 +/-    3.57      46.5 +/-    3.57  0.040 / 0.040
G06     172.4          46.8               15.7 +/-    1.22      20.7 +/-    1.22  0.150 / 0.360
G13     232.7          17.8               17.2 +/-    2.59      40.0 +/-    2.59  0.120 / 0.310
G17     6.1            67.5               13.3 +/-    0.83      14.2 +/-    0.83  0.090 / 0.150
G19     293.7          70.2               14.1 +/-    0.39      14.9 +/-    0.39  0.140 / 0.170
G24     313.9          24.6               11.7 +/-    2.25      23.2 +/-    2.25  0.100 / 0.180
G28     79.9           43.4               13.1 +/-    1.59      18.0 +/-    1.59  0.090 / 0.230
G30     155.9          20.7               17.2 +/-    1.65      37.3 +/-    1.65  0.160 / 0.330