PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-16:57:50
G01     124.8          12.7               13.1 +/-    2.04      34.4 +/-    2.04  0.120 / 0.110
G07     73.1           65.2               12.8 +/-    0.42      14.0 +/-    0.42  0.060 / 0.100
G08     49.0           37.9               11.7 +/-    1.31      17.6 +/-    1.31  0.040 / 0.030
G09     178.7          35.3               13.2 +/-    0.92      20.9 +/-    0.92  0.030 / 0.030
G11     114.8          37.2               13.3 +/-    0.95      20.3 +/-    0.95  0.060 / 0.100
G13     320.2          14.2               10.4 +/-    2.23      26.5 +/-    2.23  0.050 / 0.090
G17     199.8          16.6               12.2 +/-    1.82      29.2 +/-    1.82  0.090 / 0.380
G18     99.9           17.6               11.9 +/-    1.77      27.9 +/-    1.77  0.130 / 0.380
G28     273.8          50.2               12.8 +/-    3.57      16.1 +/-    3.57  0.090 / 0.100
G30     339.3          64.4               13.4 +/-    0.47      14.7 +/-    0.47  0.070 / 0.140