PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-15:12:50
G01     50.9           25.8                6.4 +/-    2.88      12.2 +/-    2.88  0.030 / 0.050
G06     177.5          22.9                9.5 +/-    1.17      19.6 +/-    1.17  0.040 / 0.050
G07     144.8          10.9                9.4 +/-    3.24      25.8 +/-    3.24  0.160 / 0.360
G11     45.0           17.1                4.8 +/-    2.27      11.3 +/-    2.27  0.280 / 0.300
G13     251.3          32.2                9.4 +/-    2.82      15.8 +/-    2.82  0.170 / 0.250
G15     285.3          15.9                9.3 +/-    1.64      22.6 +/-    1.64  0.150 / 0.280
G17     287.8          78.0                9.3 +/-    0.70       9.5 +/-    0.70  0.040 / 0.030
G19     243.2          59.7                9.5 +/-    1.37      10.8 +/-    1.37  0.040 / 0.020
G28     40.4           57.1                8.6 +/-    1.04      10.1 +/-    1.04  0.040 / 0.050
G30     148.5          42.2                9.0 +/-    0.92      12.6 +/-    0.92  0.040 / 0.050