PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-20:27:40
G01     125.5          13.0               19.8 +/-    3.73      51.5 +/-    3.73  0.030 / 0.040
G07     57.5           69.5               14.3 +/-    0.30      15.2 +/-    0.30  0.030 / 0.030
G08     51.5           42.4               10.4 +/-    0.73      14.5 +/-    0.73  0.060 / 0.040
G09     178.6          34.7               14.7 +/-    1.40      23.5 +/-    1.40  0.030 / 0.050
G11     118.6          36.0               16.7 +/-    1.24      26.0 +/-    1.24  0.130 / 0.260
G13     320.8          12.8                9.5 +/-    2.91      24.9 +/-    2.91  0.130 / 0.180
G17     201.6          13.3               21.0 +/-    3.29      54.4 +/-    3.29  0.190 / 0.260
G18     102.5          17.5               15.6 +/-    2.70      36.4 +/-    2.70  0.210 / 0.310
G28     280.2          54.3               13.8 +/-    3.31      16.6 +/-    3.31  0.110 / 0.070
G30     339.2          64.0               14.0 +/-    0.48      15.4 +/-    0.48  0.110 / 0.090