PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-19:42:40
G01     117.9          18.9               15.3 +/-    0.76      34.7 +/-    0.76  0.040 / 0.080
G07     83.3           66.2               13.4 +/-    0.31      14.5 +/-    0.31  0.040 / 0.080
G08     45.5           33.7               10.7 +/-    0.59      17.3 +/-    0.59  0.130 / 0.320
G09     177.2          25.1               13.0 +/-    1.17      25.4 +/-    1.17  0.100 / 0.270
G11     107.0          40.5               14.2 +/-    0.69      20.5 +/-    0.69  0.040 / 0.070
G13     317.2          20.2               10.5 +/-    2.97      22.9 +/-    2.97  0.050 / 0.070
G17     203.4          21.9               12.5 +/-    1.49      26.2 +/-    1.49  0.030 / 0.040
G18     93.3           21.4               14.3 +/-    1.08      30.4 +/-    1.08  0.020 / 0.040
G28     296.1          58.1               12.2 +/-    0.91      14.1 +/-    0.91  0.050 / 0.070
G30     353.7          70.9               13.3 +/-    1.21      14.0 +/-    1.21  0.050 / 0.100