PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-18:27:50
G01     116.8          19.6               18.9 +/-    1.47      42.0 +/-    1.47  0.070 / 0.090
G07     86.3           65.6               16.0 +/-    0.42      17.4 +/-    0.42  0.080 / 0.060
G08     44.7           31.7               11.9 +/-    1.27      20.2 +/-    1.27  0.030 / 0.030
G09     176.8          23.6               19.6 +/-    0.65      39.6 +/-    0.65  0.030 / 0.030
G11     104.7          41.0               16.7 +/-    1.22      24.0 +/-    1.22  0.030 / 0.030
G13     316.5          21.3               14.0 +/-    2.26      29.8 +/-    2.26  0.050 / 0.030
G17     203.4          24.1               22.9 +/-    1.62      45.8 +/-    1.62  0.090 / 0.220
G18     91.9           21.8               15.1 +/-    1.38      31.8 +/-    1.38  0.110 / 0.200
G28     298.1          58.5               15.4 +/-    0.95      17.7 +/-    0.95  0.140 / 0.180
G30     354.6          71.5               16.0 +/-    0.71      16.8 +/-    0.71  0.140 / 0.220