PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-19:58:10
G07     134.3          29.2               13.9 +/-    2.04      24.8 +/-    2.04  0.060 / 0.090
G11     56.2           33.4                9.4 +/-    2.02      15.4 +/-    2.02  0.070 / 0.090
G13     279.9          38.6               10.4 +/-    1.44      15.4 +/-    1.44  0.040 / 0.050
G15     306.0          14.5                7.6 +/-    2.41      19.1 +/-    2.41  0.030 / 0.050
G17     224.7          65.3               14.2 +/-    1.07      15.5 +/-    1.07  0.030 / 0.030
G18     51.2           19.2               10.1 +/-    1.97      22.7 +/-    1.97  0.030 / 0.030
G19     220.1          37.8               16.5 +/-    2.54      24.8 +/-    2.54  0.110 / 0.100
G28     1.4            61.3               10.2 +/-    0.93      11.4 +/-    0.93  0.110 / 0.080
G30     130.0          64.7               12.7 +/-    0.78      13.9 +/-    0.78  0.140 / 0.280