PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-22:13:10
G02     52.4           40.0                8.6 +/-    0.66      12.4 +/-    0.66  0.060 / 0.090
G05     75.6           68.7                8.6 +/-    0.52       9.2 +/-    0.52  0.040 / 0.080
G12     185.4          38.1                9.4 +/-    0.92      14.2 +/-    0.92  0.040 / 0.060
G13     134.4          10.9                2.2 +/-   29.31       6.1 +/-   29.31  0.040 / 0.060
G20     203.6          54.6               10.1 +/-    0.54      12.0 +/-    0.54  0.040 / 0.070
G21     265.9          13.3                9.9 +/-    1.72      25.7 +/-    1.72  0.040 / 0.060
G25     238.2          55.3               10.1 +/-    0.63      12.0 +/-    0.63  0.030 / 0.040
G29     325.2          50.3                8.9 +/-    0.89      11.2 +/-    0.89  0.030 / 0.040