PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-18:57:40
G07     23.8           69.0               12.1 +/-    1.06      12.9 +/-    1.06  0.100 / 0.300
G08     62.2           49.2               12.6 +/-    0.96      16.1 +/-    0.96  0.170 / 0.320
G09     179.9          46.4               13.6 +/-    0.86      18.0 +/-    0.86  0.050 / 0.040
G11     128.9          29.3               16.8 +/-    0.97      29.9 +/-    0.97  0.060 / 0.040
G18     112.3          11.9               15.3 +/-    1.88      41.0 +/-    1.88  0.190 / 0.200
G23     158.8          12.1               15.7 +/-    2.61      41.9 +/-    2.61  0.160 / 0.260
G27     39.1           14.0                9.8 +/-    3.38      24.9 +/-    3.38  0.030 / 0.030
G28     263.7          48.0               11.9 +/-    3.76      15.4 +/-    3.76  0.030 / 0.030
G30     325.3          54.7               11.0 +/-    0.49      13.2 +/-    0.49  0.040 / 0.040