PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-14:57:50
G01     41.4           17.0                8.2 +/-    2.59      19.4 +/-    2.59  0.050 / 0.060
G06     174.4          37.0               11.7 +/-    1.67      17.9 +/-    1.67  0.040 / 0.050
G13     238.1          23.9               12.2 +/-    1.66      24.4 +/-    1.66  0.280 / 0.330
G15     272.7          12.8                9.4 +/-    1.86      24.7 +/-    1.86  0.230 / 0.390
G17     345.8          73.9                9.9 +/-    0.27      10.3 +/-    0.27  0.020 / 0.030
G19     273.1          69.4                9.5 +/-    0.74      10.1 +/-    0.74  0.020 / 0.030
G24     317.1          16.9                7.7 +/-    1.83      18.2 +/-    1.83  0.040 / 0.040
G28     61.9           52.3                9.2 +/-    1.00      11.3 +/-    1.00  0.040 / 0.040
G30     153.8          28.9               12.0 +/-    1.70      21.5 +/-    1.70  0.120 / 0.220