PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/15-07:12:30
G02     214.2          61.5                5.8 +/-    0.77       6.5 +/-    0.77  0.060 / 0.080
G06     62.3           75.5                5.4 +/-    0.55       5.5 +/-    0.55  0.040 / 0.070
G12     318.0          36.3                4.0 +/-    1.98       6.1 +/-    1.98  0.050 / 0.050
G17     56.1           32.4                4.2 +/-    2.13       7.0 +/-    2.13  0.050 / 0.040
G19     39.4           48.4                4.6 +/-    1.31       5.9 +/-    1.31  0.080 / 0.190
G24     268.9          41.2                5.0 +/-    2.36       7.2 +/-    2.36  0.080 / 0.210
G28     118.8          22.9                9.5 +/-    1.79      19.5 +/-    1.79  0.050 / 0.050