PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-21:28:10
G02     200.3          23.1               16.3 +/-    1.54      33.3 +/-    1.54  0.070 / 0.120
G06     172.4          54.1               13.4 +/-    1.44      16.1 +/-    1.44  0.070 / 0.110
G13     224.8          12.0               17.3 +/-    3.19      46.3 +/-    3.19  0.050 / 0.100
G17     24.6           57.9               10.8 +/-    0.67      12.5 +/-    0.67  0.050 / 0.070
G19     330.4          70.8               10.8 +/-    0.87      11.4 +/-    0.87  0.040 / 0.040
G24     307.8          31.7                9.5 +/-    1.30      16.1 +/-    1.30  0.060 / 0.040
G28     86.9           42.3               11.9 +/-    0.29      16.7 +/-    0.29  0.040 / 0.040
G30     156.7          11.0               16.4 +/-    2.07      44.8 +/-    2.07  0.040 / 0.040