PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-22:42:40
G07     303.5          44.5               10.1 +/-    1.86      13.7 +/-    1.86  0.240 / 0.320
G08     132.6          38.2               14.5 +/-    0.87      21.8 +/-    0.87  0.050 / 0.060
G09     311.0          74.8               11.0 +/-    0.67      11.4 +/-    0.67  0.040 / 0.060
G16     41.7           28.3                8.6 +/-    1.19      15.6 +/-    1.19  0.040 / 0.060
G23     141.1          66.0               12.3 +/-    0.69      13.4 +/-    0.69  0.050 / 0.070
G27     81.9           36.8               10.7 +/-    0.76      16.4 +/-    0.76  0.070 / 0.080
G28     222.8          10.8               -5.3 +/-   15.98     -14.6 +/-   15.98  0.080 / 0.070
G30     285.1          23.4               10.3 +/-    1.08      20.9 +/-    1.08  0.060 / 0.150