PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-20:57:40
G01     38.5           11.7               11.2 +/-    3.47      30.2 +/-    3.47  0.030 / 0.040
G02     199.5          14.4               18.4 +/-    2.59      46.4 +/-    2.59  0.040 / 0.040
G06     172.4          46.8               16.3 +/-    0.54      21.5 +/-    0.54  0.110 / 0.210
G13     232.7          17.8               15.9 +/-    2.25      37.0 +/-    2.25  0.120 / 0.210
G17     6.1            67.5               12.1 +/-    0.33      13.0 +/-    0.33  0.040 / 0.060
G19     293.7          70.2               12.9 +/-    0.48      13.7 +/-    0.48  0.040 / 0.050
G24     313.9          24.6               10.5 +/-    2.22      20.6 +/-    2.22  0.050 / 0.060
G28     79.9           43.4               12.3 +/-    0.92      16.9 +/-    0.92  0.040 / 0.060
G30     155.9          20.7               14.9 +/-    1.01      32.2 +/-    1.01  0.080 / 0.120