PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-16:12:50
G01     69.3           32.3               10.5 +/-    1.27      17.5 +/-    1.27  0.040 / 0.050
G07     137.3          26.0               11.4 +/-    2.19      21.7 +/-    2.19  0.040 / 0.050
G11     52.7           30.5                9.3 +/-    1.11      16.2 +/-    1.11  0.090 / 0.130
G13     272.7          38.4               11.3 +/-    1.50      16.9 +/-    1.50  0.090 / 0.140
G15     301.5          15.6                7.5 +/-    1.32      18.4 +/-    1.32  0.060 / 0.170
G17     232.0          67.7               12.7 +/-    0.46      13.6 +/-    0.46  0.050 / 0.120
G18     47.5           17.2                7.6 +/-    2.33      18.0 +/-    2.33  0.080 / 0.080
G19     223.7          43.6               13.1 +/-    1.90      18.0 +/-    1.90  0.050 / 0.090
G28     9.3            60.8               10.7 +/-    1.29      12.0 +/-    1.29  0.030 / 0.040
G30     136.2          58.5               12.1 +/-    0.55      14.0 +/-    0.55  0.030 / 0.040