PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/22-20:57:50
G10     313.7          56.9                9.9 +/-    1.92      11.6 +/-    1.92  0.040 / 0.040
G14     212.8          17.3               18.3 +/-    2.69      43.1 +/-    2.69  0.040 / 0.040
G15     45.6           20.2                8.3 +/-    2.08      18.1 +/-    2.08  0.110 / 0.310
G20     16.2           63.6               10.2 +/-    0.90      11.2 +/-    0.90  0.120 / 0.380
G21     117.6          68.5               12.4 +/-    0.99      13.3 +/-    0.99  0.310 / 0.290
G24     89.4           29.5               11.5 +/-    1.59      20.3 +/-    1.59  0.240 / 0.260
G27     290.6          37.3                7.5 +/-    1.93      11.5 +/-    1.93  0.060 / 0.090
G32     214.2          41.2               14.8 +/-    1.05      21.1 +/-    1.05  0.060 / 0.070