PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-22:42:40
G02     204.6          40.4               12.1 +/-    1.32      17.6 +/-    1.32  0.060 / 0.080
G06     158.8          72.3               11.5 +/-    0.30      12.1 +/-    0.30  0.060 / 0.070
G12     308.9          16.7                7.9 +/-    2.92      19.0 +/-    2.92  0.050 / 0.120
G17     40.8           45.0                9.0 +/-    0.82      12.1 +/-    0.82  0.050 / 0.120
G19     11.2           62.1                9.1 +/-    0.57      10.1 +/-    0.57  0.220 / 0.300
G24     290.8          40.8                7.6 +/-    9.33      10.9 +/-    9.33  0.130 / 0.210
G28     104.9          31.7               10.5 +/-    0.97      17.8 +/-    0.97  0.030 / 0.020