PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-17:28:10
G02     219.3          61.8               10.6 +/-    1.05      11.8 +/-    1.05  0.050 / 0.070
G06     51.3           71.4               12.7 +/-    0.71      13.4 +/-    0.71  0.040 / 0.080
G12     318.6          37.4                8.6 +/-    1.61      13.1 +/-    1.61  0.050 / 0.100
G17     57.7           32.9                7.1 +/-    3.03      11.7 +/-    3.03  0.050 / 0.100
G19     43.8           46.0                9.5 +/-    1.15      12.6 +/-    1.15  0.120 / 0.190
G24     261.8          40.5               10.2 +/-    3.90      14.8 +/-    3.90  0.120 / 0.310
G28     122.9          16.8                7.7 +/-    1.65      18.3 +/-    1.65  0.040 / 0.060