PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-03:28:00
G08     290.3          23.1                9.9 +/-    0.80      20.3 +/-    0.80  0.100 / 0.130
G10     13.7           63.1               10.2 +/-    0.74      11.3 +/-    0.74  0.090 / 0.130
G14     232.1          46.6               15.7 +/-    0.87      20.8 +/-    0.87  0.070 / 0.090
G18     317.7          12.0                4.8 +/-    5.33      12.9 +/-    5.33  0.080 / 0.090
G20     43.5           63.1               13.1 +/-    0.38      14.5 +/-    0.38  0.050 / 0.100
G21     148.1          38.6               12.8 +/-    1.19      19.1 +/-    1.19  0.060 / 0.090
G24     52.7           23.4                8.1 +/-    0.79      16.5 +/-    0.79  0.100 / 0.130
G27     251.6          30.2               13.3 +/-    1.12      23.2 +/-    1.12  0.110 / 0.130
G31     182.0          10.4               -4.4 +/-   21.10     -12.3 +/-   21.10  0.040 / 0.030
G32     254.7          71.8               12.1 +/-    0.43      12.7 +/-    0.43  0.030 / 0.030