PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-19:28:00
G01     88.9           31.6               27.8 +/-    1.21      47.1 +/-    1.21  0.040 / 0.080
G07     126.9          38.5               14.7 +/-    0.70      22.0 +/-    0.70  0.050 / 0.070
G11     66.4           39.3               12.4 +/-    0.43      18.3 +/-    0.43  0.050 / 0.060
G13     293.2          37.0               13.0 +/-    1.47      19.9 +/-    1.47  0.050 / 0.060
G15     314.3          10.7                2.1 +/-   26.85       5.7 +/-   26.85  0.030 / 0.040
G17     213.9          54.7               16.3 +/-    1.02      19.5 +/-    1.02  0.030 / 0.030
G18     61.1           22.8               10.4 +/-    0.78      21.3 +/-    0.78  0.080 / 0.130
G19     214.2          28.0               14.4 +/-    1.30      26.4 +/-    1.30  0.080 / 0.140
G28     340.3          61.6               12.2 +/-    0.63      13.7 +/-    0.63  0.060 / 0.180
G30     109.5          73.9               15.1 +/-    0.76      15.6 +/-    0.76  0.060 / 0.190