PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-14:57:50
G01     81.2           33.1                9.2 +/-    0.85      15.1 +/-    0.85  0.030 / 0.020
G07     131.8          38.9               12.4 +/-    0.79      18.3 +/-    0.79  0.040 / 0.020
G11     60.2           35.7               10.2 +/-    1.43      16.0 +/-    1.43  0.050 / 0.060
G13     285.3          37.7               11.7 +/-    0.96      17.7 +/-    0.96  0.050 / 0.070
G15     311.8          11.4                8.3 +/-    1.88      22.5 +/-    1.88  0.060 / 0.110
G17     221.2          61.1               13.2 +/-    1.64      14.8 +/-    1.64  0.060 / 0.090
G18     56.2           21.7                9.3 +/-    4.13      19.7 +/-    4.13  0.080 / 0.090
G19     218.6          31.2               11.0 +/-    2.58      18.8 +/-    2.58  0.080 / 0.090
G28     3.5            61.0               10.2 +/-    0.94      11.5 +/-    0.94  0.150 / 0.290
G30     122.9          70.9               12.1 +/-    0.77      12.7 +/-    0.77  0.160 / 0.270