PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-17:57:50
G01     126.5          12.2               16.3 +/-    5.48      43.4 +/-    5.48  0.040 / 0.060
G07     53.9           69.7               13.4 +/-    0.52      14.2 +/-    0.52  0.050 / 0.060
G08     51.2           41.3               13.3 +/-    1.15      19.0 +/-    1.15  0.100 / 0.430
G09     178.3          35.4               14.7 +/-    1.81      23.2 +/-    1.81  0.110 / 0.370
G11     118.7          35.5               15.7 +/-    0.84      24.7 +/-    0.84  0.070 / 0.120
G13     321.0          12.1               10.5 +/-    4.57      28.1 +/-    4.57  0.070 / 0.120
G17     201.2          12.8               15.8 +/-    5.38      41.6 +/-    5.38  0.050 / 0.070
G18     103.5          17.0               14.5 +/-    0.93      34.4 +/-    0.93  0.050 / 0.070
G28     277.9          53.5               13.7 +/-    0.75      16.5 +/-    0.75  0.030 / 0.040
G30     335.5          62.0               12.5 +/-    0.56      14.0 +/-    0.56  0.030 / 0.030