PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-03:27:50
G01     111.3          22.9                6.9 +/-    1.05      14.1 +/-    1.05  0.040 / 0.040
G07     101.6          59.1                5.7 +/-    1.35       6.5 +/-    1.35  0.040 / 0.040
G08     41.9           21.6                3.8 +/-    2.77       8.1 +/-    2.77  0.090 / 0.170
G09     174.4          16.2                5.7 +/-    2.14      13.7 +/-    2.14  0.090 / 0.130
G11     92.6           42.2                5.3 +/-    0.69       7.4 +/-    0.69  0.130 / 0.180
G13     312.6          26.2                4.1 +/-    2.14       7.7 +/-    2.14  0.100 / 0.160
G17     202.9          36.0                5.7 +/-    1.00       8.8 +/-    1.00  0.030 / 0.050
G18     81.4           22.7                5.3 +/-    1.32      10.9 +/-    1.32  0.040 / 0.050
G28     304.8          59.1                4.1 +/-    1.20       4.7 +/-    1.20  0.070 / 0.130
G30     1.4            74.8                4.4 +/-    0.86       4.5 +/-    0.86  0.080 / 0.130