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               12.7 +/-    1.25      24.2 +/-    1.25  0.030 / 0.040
G07     109.0          57.2               13.1 +/-    0.38      15.3 +/-    0.38  0.030 / 0.030
G08     41.7           18.7                9.0 +/-    0.89      20.4 +/-    0.89  0.070 / 0.130
G09     173.6          11.1               10.7 +/-    2.13      29.2 +/-    2.13  0.070 / 0.130
G11     86.3           42.6               12.8 +/-    0.70      17.8 +/-    0.70  0.040 / 0.080
G13     308.4          29.6               11.7 +/-    1.18      20.6 +/-    1.18  0.040 / 0.080
G17     206.4          39.1               15.0 +/-    1.04      22.1 +/-    1.04  0.030 / 0.050
G18     78.5           24.4               11.0 +/-    0.72      21.8 +/-    0.72  0.040 / 0.050
G28     320.5          61.2               11.7 +/-    1.05      13.2 +/-    1.05  0.040 / 0.060
G30     26.0           78.7               12.7 +/-    0.30      12.9 +/-    0.30  0.040 / 0.060