PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-18:28:10
G02     203.1          33.4               17.8 +/-    0.97      29.1 +/-    0.97  0.070 / 0.110
G06     161.1          67.9               13.2 +/-    1.05      14.1 +/-    1.05  0.060 / 0.210
G12     306.0          13.0               12.3 +/-    2.13      32.0 +/-    2.13  0.090 / 0.140
G17     33.6           51.0               11.9 +/-    1.26      14.8 +/-    1.26  0.080 / 0.110
G19     2.0            65.3               12.2 +/-    0.61      13.3 +/-    0.61  0.080 / 0.050
G24     298.4          37.6               11.5 +/-    2.51      17.4 +/-    2.51  0.070 / 0.090
G28     98.7           36.4               13.1 +/-    1.07      20.2 +/-    1.07  0.180 / 0.090