PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-05:12:50
G01     40.5           15.7                2.7 +/-    2.14       6.6 +/-    2.14  0.080 / 0.090
G06     174.3          36.9                6.7 +/-    1.02      10.3 +/-    1.02  0.070 / 0.090
G13     237.5          23.9                6.2 +/-    2.04      12.5 +/-    2.04  0.130 / 0.210
G15     269.2          13.1                1.9 +/-    1.60       4.8 +/-    1.60  0.180 / 0.190
G17     0.9            71.6                5.4 +/-    0.60       5.7 +/-    0.60  0.040 / 0.050
G19     275.2          70.3                6.8 +/-    0.91       7.2 +/-    0.91  0.040 / 0.050
G24     317.2          16.4                3.4 +/-    1.31       8.1 +/-    1.31  0.050 / 0.030
G28     58.6           54.1                6.3 +/-    1.14       7.6 +/-    1.14  0.030 / 0.030
G30     155.5          33.4                8.1 +/-    1.19      13.2 +/-    1.19  0.030 / 0.030