PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-21:43:00
G02     199.5          16.7               21.5 +/-    1.83      51.3 +/-    1.83  0.090 / 0.170
G06     174.7          46.4               15.7 +/-    0.76      20.8 +/-    0.76  0.090 / 0.150
G13     229.7          16.4               18.1 +/-    1.68      43.4 +/-    1.68  0.060 / 0.070
G17     17.2           63.0               10.8 +/-    0.58      12.0 +/-    0.58  0.050 / 0.060
G19     307.0          71.7               10.6 +/-    0.70      11.1 +/-    0.70  0.150 / 0.170
G24     312.1          27.1                8.4 +/-    1.77      15.6 +/-    1.77  0.100 / 0.230
G28     78.8           45.8                9.7 +/-    1.00      12.9 +/-    1.00  0.040 / 0.020
G30     155.9          17.4               18.7 +/-    2.54      43.8 +/-    2.54  0.040 / 0.040