PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-22:57:40
G02     58.8           33.1                8.3 +/-    0.80      13.7 +/-    0.80  0.230 / 0.760
G05     58.2           60.9                7.9 +/-    0.40       8.9 +/-    0.40  0.220 / 1.030
G12     185.8          35.2               10.4 +/-    1.93      16.5 +/-    1.93  0.050 / 0.040
G13     127.4          14.5               11.5 +/-    2.41      29.0 +/-    2.41  0.040 / 0.030
G15     163.4          12.4               13.6 +/-    1.93      36.1 +/-    1.93  0.060 / 0.110
G21     271.0          16.6               13.0 +/-    3.70      31.1 +/-    3.70  0.050 / 0.110
G25     238.3          52.6               10.0 +/-    1.55      12.3 +/-    1.55  0.060 / 0.030
G29     329.8          55.5               10.5 +/-    0.69      12.4 +/-    0.69  0.050 / 0.030