PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-18:57:40
G07     59.6           67.1               12.9 +/-    0.37      13.9 +/-    0.37  0.090 / 0.080
G08     52.2           40.8               11.9 +/-    1.18      17.0 +/-    1.18  0.090 / 0.070
G09     179.2          40.4               15.2 +/-    0.85      22.0 +/-    0.85  0.040 / 0.030
G11     119.8          34.4               15.7 +/-    0.53      25.1 +/-    0.53  0.030 / 0.030
G17     198.9          12.8               14.5 +/-    2.34      38.1 +/-    2.34  0.100 / 0.130
G18     103.9          15.2               14.4 +/-    2.33      35.7 +/-    2.33  0.090 / 0.090
G23     160.7          10.7               17.0 +/-    2.44      46.7 +/-    2.44  0.220 / 0.250
G27     38.0           11.0               10.6 +/-    2.29      29.0 +/-    2.29  0.100 / 0.240
G28     267.5          47.9               12.6 +/-    3.03      16.3 +/-    3.03  0.030 / 0.030
G30     331.2          59.4               12.2 +/-    0.39      14.0 +/-    0.39  0.040 / 0.040