PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-18:57:40
G02     60.1           32.6               15.0 +/-    1.03      24.9 +/-    1.03  0.140 / 0.270
G05     60.9           64.8               16.2 +/-    0.65      17.7 +/-    0.65  0.140 / 0.240
G12     185.2          31.5               18.9 +/-    1.65      32.2 +/-    1.65  0.040 / 0.090
G13     129.1          15.8               21.5 +/-    2.34      52.4 +/-    2.34  0.060 / 0.110
G15     163.4          12.6               23.8 +/-    3.42      62.8 +/-    3.42  0.040 / 0.060
G20     208.0          61.8               18.5 +/-    0.40      20.7 +/-    0.40  0.050 / 0.060
G21     272.3          19.0               13.6 +/-    1.26      30.6 +/-    1.26  0.040 / 0.050
G25     230.1          50.3               16.8 +/-    0.87      21.1 +/-    0.87  0.040 / 0.040
G29     332.4          59.3               15.3 +/-    0.71      17.5 +/-    0.71  0.030 / 0.040