PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-15:57:40
G02     201.8          25.0               12.7 +/-    3.01      24.7 +/-    3.01  0.070 / 0.100
G06     166.3          60.7               11.4 +/-    1.07      12.9 +/-    1.07  0.100 / 0.130
G17     24.2           57.7                8.5 +/-    1.08       9.9 +/-    1.08  0.040 / 0.030
G19     345.6          69.1                8.6 +/-    0.86       9.1 +/-    0.86  0.030 / 0.040
G24     305.6          33.1                7.1 +/-    1.44      11.7 +/-    1.44  0.050 / 0.080
G28     90.4           41.3                9.0 +/-    1.21      12.8 +/-    1.21  0.060 / 0.070