PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-23:13:10
G02     226.8          70.0               10.4 +/-    0.43      11.0 +/-    0.43  0.220 / 0.330
G05     173.8          10.6               -5.6 +/-   28.05     -15.4 +/-   28.05  0.340 / 0.360
G06     44.4           68.6                8.7 +/-    0.75       9.3 +/-    0.75  0.060 / 0.080
G12     319.9          41.9                9.9 +/-    0.51      14.0 +/-    0.51  0.060 / 0.100
G17     64.8           26.2                8.8 +/-    0.86      16.8 +/-    0.86  0.050 / 0.070
G19     49.5           42.8               10.7 +/-    1.16      14.9 +/-    1.16  0.030 / 0.060
G24     252.2          38.4               12.8 +/-    1.83      19.1 +/-    1.83  0.100 / 0.230
G28     127.2          10.7               14.9 +/-    3.72      40.9 +/-    3.72  0.030 / 0.030