PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-17:57:40
G01     122.1          15.8               14.1 +/-    2.39      34.5 +/-    2.39  0.040 / 0.050
G07     70.4           68.3               14.7 +/-    0.31      15.7 +/-    0.31  0.060 / 0.070
G08     47.5           36.7               12.0 +/-    0.86      18.4 +/-    0.86  0.030 / 0.030
G09     177.6          29.6               15.9 +/-    2.01      28.1 +/-    2.01  0.030 / 0.030
G11     112.4          38.4               16.3 +/-    0.70      24.4 +/-    0.70  0.030 / 0.040
G13     319.2          16.6               12.3 +/-    3.37      29.5 +/-    3.37  0.030 / 0.040
G17     202.0          18.2               13.8 +/-    2.02      31.7 +/-    2.02  0.110 / 0.170
G18     98.2           19.5               12.8 +/-    1.25      28.6 +/-    1.25  0.110 / 0.170
G28     287.0          56.1               14.4 +/-    2.29      16.9 +/-    2.29  0.060 / 0.050
G30     343.0          66.5               14.3 +/-    0.59      15.4 +/-    0.59  0.070 / 0.060