PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-20:57:50
G10     261.7          34.1               15.0 +/-    1.21      24.1 +/-    1.21  0.120 / 0.430
G13     45.3           23.6               11.0 +/-    1.03      22.2 +/-    1.03  0.110 / 0.460
G15     65.3           52.2               14.8 +/-    0.44      18.2 +/-    0.44  0.040 / 0.040
G16     287.9          12.5               13.8 +/-    1.63      36.3 +/-    1.63  0.040 / 0.050
G18     290.8          62.7               13.5 +/-    0.69      14.9 +/-    0.69  0.190 / 0.470
G20     51.1           38.6               12.3 +/-    0.79      18.3 +/-    0.79  0.190 / 0.420
G21     356.3          69.7               15.5 +/-    0.44      16.4 +/-    0.44  0.120 / 0.300
G26     261.0          10.2               14.0 +/-    2.01      38.8 +/-    2.01  0.130 / 0.210
G27     319.9          16.3               10.7 +/-    1.54      25.8 +/-    1.54  0.060 / 0.220
G29     165.4          32.0               17.5 +/-    0.92      29.5 +/-    0.92  0.080 / 0.250