PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-17:43:10
G02     28.8           58.0                9.9 +/-    0.72      11.4 +/-    0.72  0.030 / 0.040
G05     142.9          60.9               10.9 +/-    0.54      12.3 +/-    0.54  0.030 / 0.040
G06     52.9           15.8                7.3 +/-    0.64      17.8 +/-    0.64  0.040 / 0.060
G12     200.7          69.8                8.7 +/-    0.94       9.2 +/-    0.94  0.040 / 0.070
G25     299.4          51.8                7.9 +/-    1.39       9.7 +/-    1.39  0.050 / 0.060
G29     306.3          27.1                7.7 +/-    1.29      14.4 +/-    1.29  0.040 / 0.040