PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-16:42:50
G01     41.9           17.6                7.9 +/-    2.97      18.5 +/-    2.97  0.070 / 0.070
G06     175.1          35.8               11.5 +/-    1.13      18.0 +/-    1.13  0.050 / 0.060
G13     238.8          24.3               11.1 +/-    2.34      22.1 +/-    2.34  0.200 / 0.320
G15     272.8          13.1                9.9 +/-    1.32      25.7 +/-    1.32  0.250 / 0.270
G17     348.6          73.7               10.6 +/-    0.91      11.0 +/-    0.91  0.040 / 0.040
G19     270.7          68.8               10.9 +/-    0.85      11.6 +/-    0.85  0.030 / 0.040
G24     317.2          16.7               17.4 +/-    1.88      41.6 +/-    1.88  0.040 / 0.050
G28     61.5           52.2               11.0 +/-    0.88      13.5 +/-    0.88  0.030 / 0.040
G30     153.2          28.3               12.2 +/-    1.07      22.2 +/-    1.07  0.080 / 0.090