PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-03:28:10
G07     354.8          64.3                4.8 +/-    0.95       5.2 +/-    0.95  0.040 / 0.110
G08     77.3           51.7                5.5 +/-    1.06       6.7 +/-    1.06  0.050 / 0.110
G09     182.8          60.9                6.3 +/-    0.83       7.0 +/-    0.83  0.030 / 0.040
G11     137.9          20.4                7.7 +/-    2.66      16.7 +/-    2.66  0.030 / 0.030
G23     159.0          29.9                6.3 +/-    1.87      11.1 +/-    1.87  0.030 / 0.030
G27     45.0           23.4                3.2 +/-    2.01       6.4 +/-    2.01  0.030 / 0.030
G28     248.7          39.5                5.9 +/-    0.87       8.6 +/-    0.87  0.040 / 0.030
G30     313.0          44.6                4.3 +/-    0.88       5.8 +/-    0.88  0.040 / 0.030