PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-17:28:10
G01     122.2          15.6               15.0 +/-    2.16      36.8 +/-    2.16  0.030 / 0.040
G07     70.0           68.4               11.8 +/-    0.80      12.6 +/-    0.80  0.030 / 0.040
G08     47.4           36.5                9.6 +/-    1.51      14.8 +/-    1.51  0.030 / 0.070
G09     177.5          29.6               13.9 +/-    1.89      24.6 +/-    1.89  0.040 / 0.060
G11     112.3          38.4               13.7 +/-    1.23      20.4 +/-    1.23  0.030 / 0.040
G13     319.3          16.5                9.6 +/-    1.33      22.9 +/-    1.33  0.030 / 0.040
G17     201.8          18.4               18.3 +/-    0.61      41.9 +/-    0.61  0.040 / 0.090
G18     98.3           19.4               11.9 +/-    0.66      26.6 +/-    0.66  0.040 / 0.110
G28     286.7          56.0               12.5 +/-    0.61      14.7 +/-    0.61  0.080 / 0.110
G30     342.3          66.2               10.7 +/-    0.71      11.5 +/-    0.71  0.080 / 0.110