PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-19:58:10
G03     190.8          23.4               11.5 +/-    2.71      23.3 +/-    2.71  0.040 / 0.040
G07     289.2          39.0                9.7 +/-    2.19      14.3 +/-    2.19  0.030 / 0.030
G08     141.9          25.7               14.4 +/-    3.20      27.6 +/-    3.20  0.190 / 0.160
G09     320.9          59.1               10.3 +/-    0.70      11.8 +/-    0.70  0.080 / 0.140
G16     45.3           46.2                9.4 +/-    0.98      12.5 +/-    0.98  0.040 / 0.070
G23     84.4           83.4               10.3 +/-    0.25      10.4 +/-    0.25  0.120 / 0.090
G26     43.7           19.9                7.8 +/-    1.92      17.1 +/-    1.92  0.060 / 0.080
G27     106.9          31.9               11.9 +/-    0.76      20.0 +/-    0.76  0.060 / 0.080