PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-17:12:50
G01     128.1          10.0              -11.0 +/-   41.02     -30.7 +/-   41.02  0.040 / 0.040
G07     62.8           66.6               11.8 +/-    0.75      12.7 +/-    0.75  0.030 / 0.030
G08     52.2           41.1                8.9 +/-    1.18      12.8 +/-    1.18  0.030 / 0.030
G09     179.3          39.9               12.1 +/-    1.07      17.6 +/-    1.07  0.030 / 0.030
G11     119.4          34.8               12.7 +/-    1.01      20.3 +/-    1.01  0.110 / 0.100
G17     199.2          12.7               10.5 +/-    3.19      27.5 +/-    3.19  0.110 / 0.090
G18     103.8          15.6               12.6 +/-    1.99      31.0 +/-    1.99  0.100 / 0.290
G27     37.7           10.2                8.2 +/-    2.31      22.8 +/-    2.31  0.110 / 0.310
G28     268.0          47.8               11.8 +/-    2.82      15.3 +/-    2.82  0.100 / 0.290
G30     333.2          60.7               10.4 +/-    0.80      11.8 +/-    0.80  0.110 / 0.290