PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-14:27:50
G01     105.6          26.3               11.6 +/-    1.18      22.0 +/-    1.18  0.030 / 0.020
G07     109.0          57.2               12.4 +/-    0.37      14.5 +/-    0.37  0.020 / 0.020
G08     41.7           18.7                9.7 +/-    1.91      22.1 +/-    1.91  0.030 / 0.040
G09     173.6          11.1               11.3 +/-    4.01      30.6 +/-    4.01  0.030 / 0.030
G11     86.3           42.6               12.0 +/-    1.45      16.7 +/-    1.45  0.090 / 0.120
G13     308.4          29.6               10.2 +/-    1.43      18.1 +/-    1.43  0.090 / 0.170
G17     206.4          39.1               13.2 +/-    1.00      19.4 +/-    1.00  0.060 / 0.120
G18     78.5           24.4               11.9 +/-    1.19      23.5 +/-    1.19  0.060 / 0.130
G28     320.5          61.2                9.8 +/-    0.79      11.0 +/-    0.79  0.070 / 0.120
G30     26.0           78.7               12.2 +/-    1.13      12.5 +/-    1.13  0.080 / 0.100