PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-04:27:50
G01     123.4          14.7                8.8 +/-    1.68      22.2 +/-    1.68  0.030 / 0.050
G07     67.4           68.1                4.5 +/-    0.47       4.8 +/-    0.47  0.040 / 0.060
G08     47.4           35.6                3.7 +/-    0.32       5.8 +/-    0.32  0.030 / 0.040
G09     178.0          31.8                7.1 +/-    2.84      12.1 +/-    2.84  0.030 / 0.040
G11     113.7          37.0                8.4 +/-    0.77      12.9 +/-    0.77  0.040 / 0.060
G13     320.3          14.1                1.8 +/-    2.29       4.5 +/-    2.29  0.050 / 0.080
G17     200.4          20.3                6.5 +/-    0.75      14.1 +/-    0.75  0.050 / 0.150
G28     284.8          55.6                4.3 +/-    0.69       5.0 +/-    0.69  0.060 / 0.130
G30     341.7          65.4                2.7 +/-    0.57       2.9 +/-    0.57  0.150 / 0.250