PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-07:27:40
G02     202.8          32.0                8.4 +/-    1.19      14.1 +/-    1.19  0.060 / 0.090
G06     165.2          65.8               10.0 +/-    1.08      10.9 +/-    1.08  0.050 / 0.080
G12     306.0          13.3                3.2 +/-    2.10       8.3 +/-    2.10  0.100 / 0.200
G17     36.5           48.5                5.0 +/-    0.50       6.5 +/-    0.50  0.110 / 0.170
G19     350.1          67.2                5.0 +/-    0.72       5.4 +/-    0.72  0.040 / 0.030
G24     296.0          40.4                5.7 +/-    0.68       8.3 +/-    0.68  0.040 / 0.030
G28     99.2           34.4                8.2 +/-    0.71      13.1 +/-    0.71  0.080 / 0.130