PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-22:27:40
G07     329.3          56.5                8.0 +/-    1.13       9.4 +/-    1.13  0.110 / 0.200
G08     106.3          51.5               11.1 +/-    0.63      13.8 +/-    0.63  0.070 / 0.180
G09     200.0          76.7                9.3 +/-    1.09       9.5 +/-    1.09  0.040 / 0.050
G11     149.4          10.9                7.0 +/-   28.48      19.3 +/-   28.48  0.030 / 0.060
G23     154.3          42.7               10.0 +/-    0.96      13.9 +/-    0.96  0.050 / 0.080
G27     56.5           32.2                8.1 +/-    0.77      13.6 +/-    0.77  0.070 / 0.070
G28     235.9          28.4               12.9 +/-    3.06      23.4 +/-    3.06  0.200 / 0.520
G30     302.9          37.5                9.0 +/-    1.23      13.6 +/-    1.23  0.220 / 0.460