PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-17:42:50
G01     310.4          30.5                8.2 +/-    1.74      14.1 +/-    1.74  0.070 / 0.160
G10     101.5          43.4               25.3 +/-    0.56      34.9 +/-    0.56  0.090 / 0.160
G11     288.3          27.2                7.4 +/-    1.43      13.7 +/-    1.43  0.030 / 0.050
G14     345.1          68.7                8.3 +/-    0.68       8.8 +/-    0.68  0.030 / 0.040
G18     115.2          15.3               11.6 +/-    1.95      28.8 +/-    1.95  0.060 / 0.150
G22     308.2          23.0                5.5 +/-    1.88      11.2 +/-    1.88  0.070 / 0.170
G25     86.5           15.4               11.8 +/-    1.70      29.0 +/-    1.70  0.090 / 0.130
G31     170.3          60.4               11.6 +/-    0.82      13.1 +/-    0.82  0.060 / 0.130
G32     31.8           55.3                8.4 +/-    0.85      10.0 +/-    0.85  0.040 / 0.040