PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-16:57:30
G02     24.7           62.5               11.3 +/-    0.73      12.6 +/-    0.73  0.090 / 0.070
G05     156.5          52.6               14.4 +/-    0.51      17.7 +/-    0.51  0.060 / 0.050
G06     49.6           23.0                8.3 +/-    2.25      16.9 +/-    2.25  0.020 / 0.020
G12     217.8          75.6               11.3 +/-    0.61      11.7 +/-    0.61  0.020 / 0.020
G19     94.8           12.9               11.3 +/-    2.04      29.6 +/-    2.04  0.180 / 0.290
G20     197.7          18.9               13.0 +/-    2.20      29.5 +/-    2.20  0.210 / 0.290
G25     304.5          50.6               11.7 +/-    4.51      14.6 +/-    4.51  0.030 / 0.040
G29     303.7          25.9                9.9 +/-    1.46      18.9 +/-    1.46  0.030 / 0.040