PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-06:43:00
G02     204.2          43.2                9.9 +/-    1.23      13.7 +/-    1.23  0.040 / 0.070
G06     145.3          74.7                9.8 +/-    0.43      10.2 +/-    0.43  0.040 / 0.060
G12     310.5          21.6                4.2 +/-    4.20       8.9 +/-    4.20  0.070 / 0.080
G17     41.7           44.1                5.4 +/-    0.70       7.4 +/-    0.70  0.070 / 0.080
G19     16.5           60.4                6.8 +/-    0.52       7.7 +/-    0.52  0.050 / 0.140
G24     292.0          39.4                6.8 +/-    0.95      10.0 +/-    0.95  0.050 / 0.120
G28     103.6          35.2                8.7 +/-    0.82      13.7 +/-    0.82  0.080 / 0.190