PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-01:28:00
G10     310.0          56.0                8.5 +/-    1.73      10.0 +/-    1.73  0.040 / 0.040
G14     211.9          17.4               12.3 +/-    0.89      28.9 +/-    0.89  0.030 / 0.040
G15     45.5           21.4                7.5 +/-    2.14      15.9 +/-    2.14  0.080 / 0.060
G20     8.0            64.5                9.9 +/-    0.28      10.8 +/-    0.28  0.070 / 0.070
G21     113.7          69.9               11.4 +/-    0.79      12.1 +/-    0.79  0.080 / 0.070
G24     90.6           28.8               10.1 +/-    0.92      18.2 +/-    0.92  0.080 / 0.080
G27     293.4          36.5               10.9 +/-    2.42      16.8 +/-    2.42  0.140 / 0.260
G32     213.6          37.5               11.7 +/-    1.63      17.8 +/-    1.63  0.080 / 0.480