PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-22:57:40
G02     214.4          59.0               12.6 +/-    0.61      14.4 +/-    0.61  0.100 / 0.230
G06     69.9           78.5                9.5 +/-    0.81       9.7 +/-    0.81  0.120 / 0.250
G12     316.8          31.7                8.8 +/-    1.20      15.0 +/-    1.20  0.060 / 0.070
G17     55.8           33.0                9.0 +/-    1.19      14.8 +/-    1.19  0.080 / 0.080
G19     37.2           50.1               10.2 +/-    1.27      12.9 +/-    1.27  0.060 / 0.130
G24     266.5          42.0               10.7 +/-    2.04      15.1 +/-    2.04  0.100 / 0.100
G28     119.9          19.1               12.5 +/-    1.72      28.2 +/-    1.72  0.030 / 0.030