PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-20:12:50
G01     89.0           31.6               11.0 +/-    1.40      18.5 +/-    1.40  0.050 / 0.060
G07     126.8          38.9               12.8 +/-    0.96      18.9 +/-    0.96  0.040 / 0.070
G11     66.3           39.2               11.5 +/-    1.68      17.0 +/-    1.68  0.060 / 0.130
G13     293.3          37.0                9.5 +/-    2.54      14.5 +/-    2.54  0.070 / 0.110
G15     314.4          10.7               -3.0 +/-   23.20      -8.4 +/-   23.20  0.120 / 0.130
G17     213.8          55.0               14.9 +/-    0.76      17.8 +/-    0.76  0.100 / 0.160
G18     60.9           22.7                9.2 +/-    1.26      19.0 +/-    1.26  0.060 / 0.050
G19     214.2          27.8               14.0 +/-    2.01      25.8 +/-    2.01  0.040 / 0.050
G28     340.7          61.6               10.9 +/-    0.56      12.2 +/-    0.56  0.030 / 0.020
G30     108.8          74.3               13.7 +/-    0.68      14.2 +/-    0.68  0.020 / 0.030