PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-18:57:50
G01     126.9          11.8               17.8 +/-    4.23      47.7 +/-    4.23  0.040 / 0.060
G07     51.9           69.7               14.5 +/-    0.67      15.4 +/-    0.67  0.040 / 0.060
G08     52.2           42.6               12.8 +/-    0.84      17.9 +/-    0.84  0.080 / 0.110
G09     178.6          36.3               18.1 +/-    1.25      28.1 +/-    1.25  0.070 / 0.130
G11     119.9          35.1               17.9 +/-    1.02      28.3 +/-    1.02  0.030 / 0.040
G13     321.2          11.5                5.7 +/-   23.71      15.4 +/-   23.71  0.030 / 0.050
G17     201.4          11.5               13.9 +/-   33.10      37.7 +/-   33.10  0.090 / 0.380
G18     104.1          16.7               15.3 +/-    1.08      36.6 +/-    1.08  0.090 / 0.460
G28     277.1          53.3               16.2 +/-    1.08      19.7 +/-    1.08  0.030 / 0.040
G30     335.5          61.9               12.8 +/-    0.48      14.3 +/-    0.48  0.030 / 0.040