PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/28-18:57:50
G10     290.2          49.5                9.1 +/-    3.41      11.5 +/-    3.41  0.090 / 0.130
G15     48.0           35.9                8.1 +/-    0.97      12.6 +/-    0.97  0.080 / 0.130
G20     339.8          65.3                9.1 +/-    0.65       9.9 +/-    0.65  0.040 / 0.040
G21     80.2           75.6                9.1 +/-    0.44       9.4 +/-    0.44  0.040 / 0.040
G24     99.3           24.1                9.6 +/-    0.64      19.2 +/-    0.64  0.060 / 0.090
G27     307.1          30.5                9.6 +/-    1.15      16.7 +/-    1.15  0.070 / 0.110
G29     168.2          12.2                7.9 +/-    2.71      21.1 +/-    2.71  0.050 / 0.090
G32     208.5          27.2                9.2 +/-    1.69      17.0 +/-    1.69  0.040 / 0.080