PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-05:12:30
G01     39.6           14.3                1.8 +/-    2.66       4.5 +/-    2.66  0.060 / 0.100
G06     173.9          38.9                6.4 +/-    1.23       9.5 +/-    1.23  0.080 / 0.100
G13     235.9          22.7                5.3 +/-    1.48      11.0 +/-    1.48  0.140 / 0.230
G15     267.5          12.4                3.5 +/-    3.38       9.3 +/-    3.38  0.170 / 0.300
G17     4.6            70.1                4.6 +/-    0.41       4.8 +/-    0.41  0.030 / 0.030
G19     281.1          71.1                4.6 +/-    0.51       4.9 +/-    0.51  0.040 / 0.030
G24     316.7          17.9                2.7 +/-    2.33       6.2 +/-    2.33  0.040 / 0.050
G28     61.5           53.4                4.7 +/-    1.16       5.7 +/-    1.16  0.040 / 0.050
G30     156.0          31.5                7.1 +/-    0.99      12.1 +/-    0.99  0.030 / 0.020