PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-07:28:10
G02     228.0          72.7                5.5 +/-    0.47       5.7 +/-    0.47  0.040 / 0.040
G06     43.7           65.3                3.7 +/-    0.75       4.0 +/-    0.75  0.040 / 0.040
G12     320.9          46.6                3.7 +/-    0.63       4.8 +/-    0.63  0.050 / 0.060
G17     65.1           25.5                4.8 +/-    2.13       9.2 +/-    2.13  0.050 / 0.060
G19     51.2           41.1                2.8 +/-    1.15       4.0 +/-    1.15  0.140 / 0.410
G24     254.6          38.0                6.0 +/-    1.62       9.0 +/-    1.62  0.160 / 0.350
G28     126.5          14.5                7.6 +/-    2.53      19.1 +/-    2.53  0.030 / 0.030