PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-23:13:10
G07     338.6          59.9                6.8 +/-    0.39       7.7 +/-    0.39  0.100 / 0.110
G08     95.0           53.1                7.7 +/-    0.76       9.3 +/-    0.76  0.100 / 0.130
G09     189.6          70.4               11.5 +/-    0.96      12.1 +/-    0.96  0.030 / 0.040
G11     145.2          14.8                9.3 +/-    0.97      23.3 +/-    0.97  0.030 / 0.040
G23     156.4          36.6                9.7 +/-    0.85      14.9 +/-    0.85  0.080 / 0.070
G27     50.9           28.8                6.9 +/-    2.08      12.4 +/-    2.08  0.060 / 0.120
G28     240.9          33.3                7.5 +/-    1.25      12.2 +/-    1.25  0.070 / 0.090
G30     307.9          41.2                6.9 +/-    1.65       9.8 +/-    1.65  0.060 / 0.080