PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-17:57:50
G07     47.3           67.8               12.6 +/-    0.85      13.5 +/-    0.85  0.030 / 0.040
G08     57.1           44.6               12.5 +/-    1.55      17.0 +/-    1.55  0.030 / 0.030
G09     180.0          45.8               14.7 +/-    1.49      19.6 +/-    1.49  0.040 / 0.040
G11     124.7          31.4               13.8 +/-    1.76      23.4 +/-    1.76  0.040 / 0.040
G18     108.5          12.8               13.7 +/-    2.19      35.8 +/-    2.19  0.150 / 0.090
G23     160.4          15.0               12.2 +/-    2.03      30.4 +/-    2.03  0.190 / 0.120
G27     39.3           14.9               10.3 +/-    2.86      25.6 +/-    2.86  0.100 / 0.290
G28     261.1          44.6               14.1 +/-    3.60      19.1 +/-    3.60  0.120 / 0.360
G30     326.4          55.9               11.0 +/-    0.54      13.0 +/-    0.54  0.150 / 0.350