PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-23:27:30
G03     190.2          18.3                8.7 +/-    0.84      19.9 +/-    0.84  0.270 / 0.340
G07     294.2          40.2                8.7 +/-    2.67      12.7 +/-    2.67  0.330 / 0.340
G08     136.5          31.8               11.8 +/-    2.07      19.9 +/-    2.07  0.070 / 0.100
G09     322.1          73.8                8.6 +/-    0.38       8.9 +/-    0.38  0.070 / 0.100
G16     42.5           32.8                5.6 +/-    0.98       9.3 +/-    0.98  0.030 / 0.030
G23     127.1          76.5                7.6 +/-    0.73       7.8 +/-    0.73  0.030 / 0.030
G27     94.4           34.8               10.5 +/-    0.68      16.8 +/-    0.68  0.160 / 0.190
G30     275.7          11.9                3.8 +/-   22.71      10.2 +/-   22.71  0.140 / 0.240