PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-15:27:50
G01     39.3           13.8                5.7 +/-    2.47      14.5 +/-    2.47  0.020 / 0.030
G06     173.5          41.5               11.1 +/-    0.96      15.8 +/-    0.96  0.040 / 0.030
G13     234.5          21.0                8.3 +/-    1.22      17.7 +/-    1.22  0.250 / 0.390
G15     268.7          11.4                6.2 +/-    1.20      16.8 +/-    1.20  0.190 / 0.340
G17     357.9          70.8                7.8 +/-    0.83       8.2 +/-    0.83  0.040 / 0.070
G19     286.7          71.2                7.4 +/-    0.71       7.7 +/-    0.71  0.060 / 0.050
G24     315.7          20.5                4.4 +/-    2.12       9.5 +/-    2.12  0.060 / 0.080
G28     68.3           50.3                7.3 +/-    1.28       9.1 +/-    1.28  0.070 / 0.070
G30     154.9          24.4                9.7 +/-    1.54      19.2 +/-    1.54  0.040 / 0.030