PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-19:58:10
G01     274.9          41.7                8.7 +/-    1.24      12.3 +/-    1.24  0.060 / 0.070
G03     315.3          26.7                6.7 +/-    2.40      12.6 +/-    2.40  0.060 / 0.080
G10     127.8          18.7               11.0 +/-    0.84      25.1 +/-    0.84  0.040 / 0.070
G11     251.7          21.2               10.5 +/-    3.31      22.4 +/-    3.31  0.040 / 0.070
G14     40.4           51.4                6.2 +/-    0.67       7.6 +/-    0.67  0.110 / 0.180
G18     232.9          40.5                9.9 +/-    1.43      14.3 +/-    1.43  0.110 / 0.190
G22     314.5          48.7                7.8 +/-    0.67      10.0 +/-    0.67  0.140 / 0.370
G25     50.4           14.3                5.2 +/-    0.97      13.2 +/-    0.97  0.180 / 0.360
G31     76.7           80.4                8.7 +/-    0.69       8.8 +/-    0.69  0.050 / 0.070
G32     60.7           35.3                6.1 +/-    0.58       9.6 +/-    0.58  0.040 / 0.070