PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-20:42:50
G01     72.1           32.8               11.1 +/-    1.73      18.5 +/-    1.73  0.070 / 0.130
G07     136.2          26.6               12.7 +/-    0.71      24.0 +/-    0.71  0.090 / 0.140
G11     53.7           31.1               10.8 +/-    1.50      18.4 +/-    1.50  0.070 / 0.110
G13     275.6          38.4               12.4 +/-    0.81      18.6 +/-    0.81  0.080 / 0.130
G15     303.1          15.3                9.9 +/-    1.15      24.4 +/-    1.15  0.130 / 0.070
G17     229.8          68.7               14.4 +/-    0.59      15.3 +/-    0.59  0.120 / 0.100
G18     48.3           17.5                9.4 +/-    2.14      22.0 +/-    2.14  0.030 / 0.040
G19     222.3          40.8               15.6 +/-    2.07      22.3 +/-    2.07  0.030 / 0.040
G28     8.1            60.9               11.5 +/-    1.17      13.0 +/-    1.17  0.030 / 0.040
G30     134.0          61.8               14.1 +/-    0.23      15.8 +/-    0.23  0.030 / 0.040