PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/07-06:43:10
G01     43.1           19.2                2.7 +/-    0.75       6.0 +/-    0.75  0.070 / 0.050
G06     176.4          33.9                5.8 +/-    1.11       9.5 +/-    1.11  0.070 / 0.050
G13     240.5          24.8                5.8 +/-    1.33      11.4 +/-    1.33  0.060 / 0.090
G15     276.2          13.1                5.0 +/-    1.04      12.9 +/-    1.04  0.050 / 0.080
G17     0.9            71.9                5.6 +/-    0.62       5.8 +/-    0.62  0.040 / 0.030
G19     262.6          64.8                4.6 +/-    0.58       5.0 +/-    0.58  0.050 / 0.030
G28     64.1           50.2                5.0 +/-    0.51       6.3 +/-    0.51  0.090 / 0.240
G30     154.0          32.9                9.0 +/-    1.05      14.9 +/-    1.05  0.060 / 0.190