PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-20:27:30
G07     34.8           69.7               12.8 +/-    0.69      13.5 +/-    0.69  0.040 / 0.050
G08     58.5           47.5               12.5 +/-    0.67      16.3 +/-    0.67  0.040 / 0.050
G09     179.6          42.6               16.4 +/-    0.64      22.9 +/-    0.64  0.020 / 0.030
G11     126.2          31.5               16.1 +/-    0.87      27.3 +/-    0.87  0.020 / 0.030
G18     109.2          13.9               13.7 +/-    2.84      35.0 +/-    2.84  0.030 / 0.040
G27     38.0           10.9               10.6 +/-    2.17      29.1 +/-    2.17  0.030 / 0.040
G28     268.9          50.3               13.9 +/-    2.66      17.5 +/-    2.66  0.160 / 0.260
G30     330.2          58.2               10.6 +/-    0.84      12.2 +/-    0.84  0.190 / 0.270