PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-09:12:40
G02     28.3           59.1                5.2 +/-    0.90       6.0 +/-    0.90  0.030 / 0.040
G05     152.7          53.9                8.0 +/-    1.03       9.7 +/-    1.03  0.030 / 0.030
G06     49.0           21.8                3.7 +/-    1.53       7.7 +/-    1.53  0.030 / 0.020
G12     208.3          75.7                5.3 +/-    0.69       5.5 +/-    0.69  0.030 / 0.020
G19     93.8           12.3                6.1 +/-    2.50      16.2 +/-    2.50  0.130 / 0.190
G25     306.2          47.9                5.7 +/-    2.09       7.4 +/-    2.09  0.120 / 0.210
G29     300.7          21.4                4.0 +/-    2.24       8.6 +/-    2.24  0.100 / 0.190