PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-22:57:20
G02     52.4           39.0                8.2 +/-    0.65      12.1 +/-    0.65  0.140 / 0.570
G05     73.5           66.7                8.7 +/-    0.49       9.4 +/-    0.49  0.180 / 0.580
G12     184.5          39.9               10.9 +/-    1.30      15.8 +/-    1.30  0.040 / 0.040
G21     264.4          11.4                9.1 +/-   13.61      24.6 +/-   13.61  0.040 / 0.040
G25     251.2          56.6               10.6 +/-    0.41      12.4 +/-    0.41  0.090 / 0.100
G29     322.2          45.7                9.7 +/-    1.19      12.9 +/-    1.19  0.040 / 0.070