PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/12-07:57:50
G02     236.7          76.0                6.0 +/-    0.36       6.1 +/-    0.36  0.270 / 0.540
G05     174.2          12.2                4.1 +/-    7.87      10.9 +/-    7.87  0.310 / 0.470
G06     41.4           61.3                4.2 +/-    0.65       4.7 +/-    0.65  0.030 / 0.050
G12     321.6          50.8                4.1 +/-    0.70       5.1 +/-    0.70  0.030 / 0.050
G17     68.2           23.3                3.7 +/-    2.84       7.5 +/-    2.84  0.030 / 0.030
G19     55.0           38.6                3.9 +/-    2.01       5.8 +/-    2.01  0.030 / 0.030
G24     250.1          36.2                7.6 +/-    2.38      11.8 +/-    2.38  0.180 / 0.430
G28     128.8          11.4                7.6 +/-    1.80      20.7 +/-    1.80  0.200 / 0.350