PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-22:42:50
G02     225.2          68.9               12.7 +/-    1.20      13.5 +/-    1.20  0.080 / 0.410
G06     45.4           69.3               12.6 +/-    0.80      13.4 +/-    0.80  0.100 / 0.310
G12     319.6          40.9               11.4 +/-    1.05      16.4 +/-    1.05  0.040 / 0.030
G17     63.8           27.1               10.9 +/-    0.55      20.3 +/-    0.55  0.030 / 0.040
G19     48.4           43.4               12.9 +/-    0.79      17.8 +/-    0.79  0.070 / 0.090
G24     253.7          38.8               13.3 +/-    1.63      19.7 +/-    1.63  0.080 / 0.130
G28     126.5          11.7               15.6 +/-    1.37      41.9 +/-    1.37  0.050 / 0.070