PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-16:28:00
G07     334.4          58.5               10.2 +/-    0.57      11.7 +/-    0.57  0.040 / 0.040
G08     100.4          52.8               11.8 +/-    0.86      14.3 +/-    0.86  0.030 / 0.030
G09     189.7          72.1               11.6 +/-    0.48      12.1 +/-    0.48  0.060 / 0.090
G11     145.6          13.9               11.9 +/-    0.95      30.4 +/-    0.95  0.060 / 0.080
G23     154.5          35.7               12.3 +/-    1.44      19.3 +/-    1.44  0.030 / 0.040
G27     53.4           30.7               10.7 +/-    2.15      18.5 +/-    2.15  0.030 / 0.040
G28     238.7          31.0               12.4 +/-    1.99      21.3 +/-    1.99  0.100 / 0.150
G30     303.7          36.8               10.3 +/-    1.23      15.9 +/-    1.23  0.150 / 0.160