PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-21:57:50
G02     28.9           58.8                8.6 +/-    0.47       9.9 +/-    0.47  0.050 / 0.050
G05     143.5          59.4               10.6 +/-    1.12      12.1 +/-    1.12  0.050 / 0.040
G06     52.4           17.1                6.3 +/-    0.57      14.8 +/-    0.57  0.030 / 0.040
G12     197.7          70.0                8.5 +/-    0.78       9.0 +/-    0.78  0.030 / 0.050
G19     96.5           13.9                8.5 +/-    2.07      21.7 +/-    2.07  0.050 / 0.070
G25     301.6          51.2                8.1 +/-    1.17      10.1 +/-    1.17  0.060 / 0.060
G29     304.4          24.4                9.4 +/-    1.26      18.7 +/-    1.26  0.060 / 0.060