PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-23:42:30
G02     269.1          80.5                9.9 +/-    0.58      10.0 +/-    0.58  0.080 / 0.150
G05     168.6          21.9               16.4 +/-    0.86      34.4 +/-    0.86  0.070 / 0.150
G06     39.0           55.2                9.5 +/-    0.66      11.4 +/-    0.66  0.090 / 0.210
G12     320.4          55.0                8.8 +/-    0.64      10.5 +/-    0.64  0.100 / 0.160
G17     75.5           18.4               10.2 +/-    0.85      23.4 +/-    0.85  0.050 / 0.030
G19     62.8           34.5               10.4 +/-    0.96      16.7 +/-    0.96  0.040 / 0.030
G24     238.2          31.0               14.5 +/-    0.85      24.9 +/-    0.85  0.040 / 0.050
G25     317.2          17.7               10.0 +/-    1.78      23.2 +/-    1.78  0.040 / 0.050