PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-18:12:50
G01     117.9          18.9               12.1 +/-    1.76      27.5 +/-    1.76  0.040 / 0.070
G07     83.4           66.2               11.7 +/-    0.24      12.7 +/-    0.24  0.040 / 0.070
G08     45.1           32.6                8.1 +/-    0.73      13.5 +/-    0.73  0.040 / 0.030
G09     176.9          24.7               11.9 +/-    1.37      23.4 +/-    1.37  0.040 / 0.040
G11     106.3          40.5               12.6 +/-    1.37      18.2 +/-    1.37  0.050 / 0.060
G13     317.1          20.4               10.5 +/-    4.50      22.9 +/-    4.50  0.050 / 0.060
G17     203.0          23.0               11.5 +/-    1.05      23.6 +/-    1.05  0.050 / 0.070
G18     93.2           21.4               11.4 +/-    0.52      24.3 +/-    0.52  0.050 / 0.090
G28     295.8          58.0               10.0 +/-    0.93      11.5 +/-    0.93  0.020 / 0.030
G30     351.7          70.5               11.5 +/-    1.40      12.2 +/-    1.40  0.020 / 0.050