PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-04:13:10
G01     58.5           29.1                3.8 +/-    1.31       6.8 +/-    1.31  0.030 / 0.040
G06     179.5          14.0                4.0 +/-   13.16      10.3 +/-   13.16  0.040 / 0.040
G07     141.6          23.4                6.9 +/-    3.11      13.9 +/-    3.11  0.090 / 0.140
G11     49.9           28.7                4.0 +/-    2.36       7.1 +/-    2.36  0.110 / 0.160
G13     261.5          36.6                6.7 +/-    1.63      10.3 +/-    1.63  0.140 / 0.220
G15     291.1          17.5                3.7 +/-    0.89       8.8 +/-    0.89  0.070 / 0.130
G17     256.5          77.3                7.3 +/-    0.65       7.5 +/-    0.65  0.050 / 0.060
G19     231.1          52.6                7.0 +/-    2.21       8.5 +/-    2.21  0.050 / 0.050
G28     17.9           60.6                5.0 +/-    2.16       5.7 +/-    2.16  0.080 / 0.080
G30     144.5          57.5                7.1 +/-    0.38       8.2 +/-    0.38  0.110 / 0.050