PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-21:28:00
G02     203.2          35.7               11.9 +/-    2.50      18.6 +/-    2.50  0.090 / 0.120
G06     163.2          68.2               12.7 +/-    0.36      13.5 +/-    0.36  0.150 / 0.120
G12     306.7          13.5               10.5 +/-    2.04      27.0 +/-    2.04  0.070 / 0.080
G17     36.5           48.6               11.2 +/-    1.41      14.4 +/-    1.41  0.080 / 0.070
G19     3.5            64.7               10.5 +/-    0.69      11.4 +/-    0.69  0.280 / 0.290
G24     296.2          38.8               10.3 +/-    3.30      15.2 +/-    3.30  0.100 / 0.250
G28     100.5          34.8               11.3 +/-    0.99      18.0 +/-    0.99  0.040 / 0.030