PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-07:12:40
G10     269.5          40.5                7.2 +/-    1.21      10.5 +/-    1.21  0.030 / 0.040
G13     40.7           16.0                3.2 +/-    2.72       7.7 +/-    2.72  0.030 / 0.030
G15     56.2           46.1                5.3 +/-    0.83       7.0 +/-    0.83  0.130 / 0.320
G16     281.7          11.1                5.5 +/-    1.98      14.8 +/-    1.98  0.130 / 0.280
G20     302.2          61.3                4.8 +/-    0.57       5.4 +/-    0.57  0.140 / 0.410
G21     16.5           73.6                5.4 +/-    0.66       5.6 +/-    0.66  0.190 / 0.500
G24     117.6          15.5                6.3 +/-    1.74      15.6 +/-    1.74  0.070 / 0.090
G27     318.6          18.9                4.4 +/-    1.60       9.9 +/-    1.60  0.080 / 0.080
G29     165.3          24.7                6.2 +/-    2.03      12.2 +/-    2.03  0.130 / 0.140