PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-19:43:10
G02     21.7           63.8                7.3 +/-    0.78       8.0 +/-    0.78  0.030 / 0.040
G05     150.9          54.3               11.4 +/-    1.22      13.6 +/-    1.22  0.040 / 0.040
G06     50.0           20.6                6.6 +/-    1.09      14.3 +/-    1.09  0.030 / 0.030
G12     202.3          74.5                9.9 +/-    0.95      10.2 +/-    0.95  0.030 / 0.030
G19     91.9           17.5                9.3 +/-    1.78      21.8 +/-    1.78  0.060 / 0.060
G25     306.8          47.8                9.6 +/-    2.26      12.4 +/-    2.26  0.060 / 0.070
G29     300.7          20.7               10.9 +/-    2.09      23.5 +/-    2.09  0.040 / 0.050