PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-18:28:10
G07     301.0          43.1               11.1 +/-    2.76      15.4 +/-    2.76  0.060 / 0.090
G08     138.1          35.4               14.9 +/-    0.91      23.5 +/-    0.91  0.060 / 0.110
G09     313.9          73.0               11.3 +/-    0.62      11.7 +/-    0.62  0.030 / 0.040
G16     41.6           28.0               10.0 +/-    1.50      18.3 +/-    1.50  0.030 / 0.040
G23     138.4          65.1               13.2 +/-    0.76      14.4 +/-    0.76  0.120 / 0.130
G27     85.0           36.7               11.3 +/-    1.43      17.3 +/-    1.43  0.150 / 0.090
G30     282.9          21.0               11.4 +/-    2.29      24.4 +/-    2.29  0.210 / 0.270