PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-21:42:40
G02     30.4           57.1                7.9 +/-    1.19       9.2 +/-    1.19  0.040 / 0.020
G05     141.2          60.5               10.0 +/-    0.36      11.3 +/-    0.36  0.050 / 0.020
G06     52.0           17.8                7.9 +/-    1.54      18.3 +/-    1.54  0.040 / 0.050
G12     207.4          71.9                9.6 +/-    0.43      10.0 +/-    0.43  0.060 / 0.050
G19     98.3           9.8                10.2 +/-    1.40      28.7 +/-    1.40  0.030 / 0.010
G25     300.4          51.5                9.8 +/-    2.02      12.2 +/-    2.02  0.030 / 0.010
G29     306.3          27.8                8.8 +/-    1.07      16.2 +/-    1.07  0.140 / 0.300