PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-22:12:50
G10     278.4          43.6               16.6 +/-    0.96      22.8 +/-    0.96  0.090 / 0.080
G13     38.8           11.7               11.2 +/-    3.45      30.0 +/-    3.45  0.050 / 0.070
G15     51.0           40.7               14.3 +/-    1.03      20.6 +/-    1.03  0.030 / 0.030
G18     325.0          66.7               15.9 +/-    0.36      17.1 +/-    0.36  0.030 / 0.030
G20     61.9           27.0               12.8 +/-    1.79      23.9 +/-    1.79  0.140 / 0.200
G21     43.9           76.6               16.2 +/-    1.33      16.6 +/-    1.33  0.150 / 0.200
G24     112.7          19.8               20.3 +/-    0.93      44.9 +/-    0.93  0.420 / 0.370
G27     311.5          27.7               12.0 +/-    2.25      22.1 +/-    2.25  0.320 / 0.530
G29     166.9          16.9               21.2 +/-    0.58      50.2 +/-    0.58  0.060 / 0.130
G32     207.1          16.2               22.4 +/-    4.26      54.2 +/-    4.26  0.080 / 0.090