PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-17:12:50
G01     119.0          18.1               17.4 +/-    1.32      40.2 +/-    1.32  0.060 / 0.080
G07     80.4           66.8               16.5 +/-    0.48      17.8 +/-    0.48  0.050 / 0.080
G08     45.4           33.0               13.6 +/-    1.37      22.4 +/-    1.37  0.020 / 0.030
G09     176.9          25.6               17.5 +/-    2.05      33.7 +/-    2.05  0.030 / 0.030
G11     107.4          40.1               17.4 +/-    0.66      25.4 +/-    0.66  0.030 / 0.020
G13     317.6          19.5               14.9 +/-    1.61      33.2 +/-    1.61  0.030 / 0.020
G17     202.5          22.5               19.3 +/-    2.38      40.1 +/-    2.38  0.110 / 0.210
G18     94.3           21.0               14.8 +/-    0.99      31.8 +/-    0.99  0.110 / 0.230
G28     293.4          57.5               16.2 +/-    1.28      18.8 +/-    1.28  0.090 / 0.160
G30     348.3          69.2               15.3 +/-    0.62      16.2 +/-    0.62  0.090 / 0.170