PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/24-17:12:30
G02     219.5          61.8               10.1 +/-    1.09      11.3 +/-    1.09  0.130 / 0.260
G06     51.0           71.2                9.4 +/-    0.73       9.8 +/-    0.73  0.150 / 0.260
G12     318.7          37.7                8.1 +/-    2.00      12.2 +/-    2.00  0.040 / 0.080
G17     57.7           32.9                7.2 +/-    2.43      11.9 +/-    2.43  0.060 / 0.110
G19     44.0           45.8                9.6 +/-    0.88      12.8 +/-    0.88  0.040 / 0.040
G24     261.7          40.4               10.7 +/-    4.54      15.5 +/-    4.54  0.030 / 0.020
G28     123.0          16.7                8.5 +/-    2.33      20.4 +/-    2.33  0.070 / 0.070