PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-01:28:00
G02     33.3           54.9                8.6 +/-    0.41      10.3 +/-    0.41  0.080 / 0.130
G05     137.2          62.1               11.3 +/-    0.75      12.6 +/-    0.75  0.070 / 0.120
G06     52.4           18.4                6.1 +/-    0.81      13.9 +/-    0.81  0.040 / 0.050
G12     205.9          70.4               10.8 +/-    0.60      11.4 +/-    0.60  0.040 / 0.050
G25     296.9          53.7                8.6 +/-    0.67      10.3 +/-    0.67  0.040 / 0.060
G29     308.8          31.1                7.7 +/-    0.95      13.2 +/-    0.95  0.040 / 0.060