PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-21:58:10
G01     87.1           32.1               10.1 +/-    1.50      16.9 +/-    1.50  0.040 / 0.060
G07     128.0          38.4               12.2 +/-    0.70      18.2 +/-    0.70  0.040 / 0.060
G11     64.4           38.2                9.5 +/-    1.34      14.2 +/-    1.34  0.060 / 0.100
G13     291.4          37.4                7.7 +/-    3.17      11.8 +/-    3.17  0.060 / 0.090
G15     313.3          11.3                4.6 +/-   18.90      12.6 +/-   18.90  0.040 / 0.040
G17     215.2          57.5               12.6 +/-    0.78      14.6 +/-    0.78  0.030 / 0.040
G18     58.7           21.9                8.1 +/-    0.75      17.0 +/-    0.75  0.110 / 0.200
G19     215.1          29.0               13.8 +/-    1.91      24.7 +/-    1.91  0.230 / 0.160
G28     345.1          61.7                9.4 +/-    0.60      10.5 +/-    0.60  0.020 / 0.020
G30     112.4          73.8               11.2 +/-    0.47      11.6 +/-    0.47  0.030 / 0.030