PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-14:28:00
G01     66.1           31.7                6.2 +/-    1.08      10.4 +/-    1.08  0.110 / 0.130
G07     138.6          24.6                6.9 +/-    1.54      13.6 +/-    1.54  0.080 / 0.150
G11     51.3           29.1                7.2 +/-    1.21      12.9 +/-    1.21  0.140 / 0.360
G13     269.2          38.0                9.4 +/-    3.71      14.2 +/-    3.71  0.170 / 0.300
G15     299.6          15.8                5.8 +/-    2.04      14.3 +/-    2.04  0.040 / 0.050
G17     235.9          68.6                9.2 +/-    0.45       9.8 +/-    0.45  0.040 / 0.060
G18     45.7           16.1                6.3 +/-    2.34      15.2 +/-    2.34  0.030 / 0.030
G19     225.8          46.3                9.7 +/-    2.72      12.8 +/-    2.72  0.030 / 0.040
G28     13.2           60.6                7.5 +/-    2.05       8.5 +/-    2.05  0.120 / 0.080
G30     138.7          57.6                8.1 +/-    0.61       9.4 +/-    0.61  0.070 / 0.110