PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-00:27:40
G02     340.2          79.2                9.1 +/-    0.88       9.3 +/-    0.88  0.120 / 0.250
G05     164.0          32.4               14.4 +/-    0.63      24.1 +/-    0.63  0.140 / 0.250
G06     40.0           44.6                7.9 +/-    0.60      10.8 +/-    0.60  0.030 / 0.040
G12     315.0          66.4                8.6 +/-    0.74       9.3 +/-    0.74  0.030 / 0.030
G17     84.5           11.8               10.8 +/-    2.77      28.8 +/-    2.77  0.060 / 0.080
G19     73.2           27.8               10.0 +/-    0.94      18.3 +/-    0.94  0.060 / 0.090
G24     228.7          23.6               13.7 +/-    3.31      27.7 +/-    3.31  0.060 / 0.120
G25     317.1          27.8                7.2 +/-    1.24      13.3 +/-    1.24  0.060 / 0.130
G29     285.9          11.0                3.3 +/-   26.41       8.9 +/-   26.41  0.070 / 0.160