PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-23:27:40
G02     228.1          70.8               13.1 +/-    0.48      13.8 +/-    0.48  0.040 / 0.050
G05     173.4          11.2                7.8 +/-   37.03      21.2 +/-   37.03  0.030 / 0.050
G06     43.7           67.9               10.9 +/-    0.55      11.7 +/-    0.55  0.060 / 0.090
G12     320.0          42.6               11.1 +/-    0.36      15.5 +/-    0.36  0.060 / 0.090
G17     65.5           25.7               10.4 +/-    1.47      20.0 +/-    1.47  0.370 / 0.460
G19     50.3           42.4               12.0 +/-    1.39      16.8 +/-    1.39  0.330 / 0.480
G24     251.2          38.0               14.6 +/-    1.13      22.0 +/-    1.13  0.030 / 0.020
G28     127.7          10.1               16.7 +/-    3.00      46.5 +/-    3.00  0.030 / 0.020