PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-18:43:10
G01     76.0           33.3               12.6 +/-    0.66      20.7 +/-    0.66  0.110 / 0.180
G07     134.8          35.3               16.7 +/-    1.39      26.4 +/-    1.39  0.100 / 0.190
G11     57.4           34.1               11.0 +/-    0.34      17.8 +/-    0.34  0.030 / 0.090
G13     280.1          37.8               14.8 +/-    0.91      22.4 +/-    0.91  0.040 / 0.090
G15     306.9          13.8               11.4 +/-    1.81      29.2 +/-    1.81  0.030 / 0.040
G17     226.3          62.4               17.5 +/-    1.46      19.5 +/-    1.46  0.040 / 0.040
G18     52.8           20.4               10.6 +/-    0.91      23.2 +/-    0.91  0.040 / 0.060
G19     221.2          36.3               17.1 +/-    2.28      26.6 +/-    2.28  0.050 / 0.060
G28     12.1           60.2               10.7 +/-    0.58      12.2 +/-    0.58  0.030 / 0.050
G30     130.3          65.4               15.3 +/-    0.51      16.6 +/-    0.51  0.030 / 0.040