PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-14:27:50
G07     30.2           69.4               10.1 +/-    0.50      10.7 +/-    0.50  0.050 / 0.060
G08     57.1           45.2                9.2 +/-    0.56      12.4 +/-    0.56  0.040 / 0.050
G09     178.1          42.8               10.9 +/-    0.91      15.2 +/-    0.91  0.050 / 0.040
G11     125.4          31.0               10.1 +/-    1.19      17.4 +/-    1.19  0.040 / 0.040
G18     110.1          13.0               10.2 +/-    1.48      26.6 +/-    1.48  0.030 / 0.030
G23     159.8          12.5                8.6 +/-    1.44      22.6 +/-    1.44  0.030 / 0.030
G27     38.6           12.9                7.8 +/-    3.05      20.3 +/-    3.05  0.170 / 0.220
G28     265.8          48.8               10.5 +/-    4.61      13.4 +/-    4.61  0.170 / 0.220
G30     325.0          54.5               10.3 +/-    0.38      12.4 +/-    0.38  0.050 / 0.060