PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-19:57:50
G01     69.8           32.5               11.0 +/-    2.09      18.3 +/-    2.09  0.030 / 0.040
G07     137.2          24.4               11.8 +/-    1.88      23.4 +/-    1.88  0.040 / 0.040
G11     52.4           29.8               10.4 +/-    0.86      18.3 +/-    0.86  0.080 / 0.150
G13     273.0          38.3               12.0 +/-    1.45      18.0 +/-    1.45  0.080 / 0.170
G15     301.4          15.7                8.6 +/-    1.26      21.0 +/-    1.26  0.040 / 0.050
G17     233.1          70.0               13.3 +/-    0.47      14.1 +/-    0.47  0.050 / 0.050
G18     47.0           16.7                9.3 +/-    2.21      22.1 +/-    2.21  0.120 / 0.250
G19     223.8          42.8               13.0 +/-    1.92      18.2 +/-    1.92  0.110 / 0.290
G28     11.3           60.6               10.8 +/-    1.53      12.2 +/-    1.53  0.060 / 0.120
G30     136.1          59.5               12.6 +/-    0.32      14.3 +/-    0.32  0.090 / 0.110