PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-09:27:50
G01     319.5          17.5                5.9 +/-    2.52      13.8 +/-    2.52  0.120 / 0.230
G08     258.6          14.1                6.0 +/-    4.53      15.3 +/-    4.53  0.190 / 0.260
G10     78.3           52.8                5.5 +/-    0.83       6.7 +/-    0.83  0.250 / 0.160
G11     303.7          22.8                4.8 +/-    1.43      10.0 +/-    1.43  0.040 / 0.040
G14     293.7          71.0                5.4 +/-    0.95       5.6 +/-    0.95  0.030 / 0.030
G18     304.9          41.1                6.0 +/-    2.13       8.6 +/-    2.13  0.090 / 0.200
G20     104.3          29.9                6.3 +/-    1.47      11.1 +/-    1.47  0.110 / 0.190
G22     301.3          13.1                0.2 +/-    4.60       0.6 +/-    4.60  0.040 / 0.060
G31     176.6          39.9                6.6 +/-    1.44       9.6 +/-    1.44  0.050 / 0.060
G32     351.4          70.8                5.6 +/-    0.59       5.9 +/-    0.59  0.110 / 0.380