PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-21:57:40
G02     215.0          59.5               18.6 +/-    0.81      21.2 +/-    0.81  0.140 / 0.280
G06     65.5           77.4               16.0 +/-    0.94      16.3 +/-    0.94  0.100 / 0.370
G12     317.0          32.3               13.2 +/-    0.89      22.0 +/-    0.89  0.060 / 0.080
G17     56.0           33.0               12.1 +/-    0.71      20.0 +/-    0.71  0.060 / 0.080
G19     38.1           49.5               14.0 +/-    0.58      17.8 +/-    0.58  0.040 / 0.110
G24     266.0          41.8               15.8 +/-    1.34      22.3 +/-    1.34  0.050 / 0.100
G28     120.3          18.8               17.4 +/-    2.80      39.3 +/-    2.80  0.040 / 0.060