PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/22-11:57:40
G02     217.4          58.5                7.3 +/-    1.07       8.4 +/-    1.07  0.060 / 0.070
G06     55.5           73.5                7.3 +/-    0.55       7.6 +/-    0.55  0.040 / 0.080
G12     319.1          38.3                4.0 +/-    0.95       6.0 +/-    0.95  0.080 / 0.050
G17     59.3           29.9                5.9 +/-    1.89      10.4 +/-    1.89  0.090 / 0.080
G19     35.9           51.4                6.5 +/-    1.82       8.1 +/-    1.82  0.030 / 0.020
G24     259.6          41.9                5.7 +/-    2.24       8.1 +/-    2.24  0.030 / 0.030
G28     122.8          14.2                7.5 +/-    2.13      19.0 +/-    2.13  0.040 / 0.050