PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-23:12:30
G02     221.0          66.0               11.8 +/-    1.05      12.8 +/-    1.05  0.180 / 0.260
G06     49.9           72.8                9.5 +/-    0.55       9.9 +/-    0.55  0.150 / 0.300
G12     318.9          37.9                7.4 +/-    1.51      11.1 +/-    1.51  0.060 / 0.080
G17     61.4           28.7                9.1 +/-    1.44      16.3 +/-    1.44  0.060 / 0.080
G19     44.9           45.6               10.1 +/-    1.24      13.6 +/-    1.24  0.060 / 0.080
G24     257.4          40.1               11.7 +/-    3.95      17.0 +/-    3.95  0.050 / 0.080
G28     124.6          13.9               12.3 +/-    3.01      31.4 +/-    3.01  0.030 / 0.020