PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-21:58:00
G01     257.9          38.0               12.8 +/-    1.58      19.2 +/-    1.58  0.040 / 0.060
G03     316.5          38.2               10.9 +/-    0.87      16.3 +/-    0.87  0.040 / 0.040
G11     242.4          15.8               10.6 +/-    1.15      25.9 +/-    1.15  0.050 / 0.080
G14     54.6           44.0                9.8 +/-    1.03      13.4 +/-    1.03  0.060 / 0.090
G22     310.4          60.2               10.9 +/-    0.91      12.4 +/-    0.91  0.070 / 0.170
G23     282.1          15.3               -0.8 +/-   10.97      -2.0 +/-   10.97  0.100 / 0.150
G25     43.8           12.9                9.7 +/-    1.10      25.4 +/-    1.10  0.020 / 0.030
G26     143.3          32.4               15.0 +/-    0.81      25.0 +/-    0.81  0.030 / 0.040
G31     42.9           66.6               10.5 +/-    0.36      11.3 +/-    0.36  0.050 / 0.100
G32     72.1           27.2                9.8 +/-    0.92      18.3 +/-    0.92  0.060 / 0.090