PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-13:57:50
G01     116.8          19.6               11.4 +/-    1.39      25.5 +/-    1.39  0.040 / 0.040
G07     86.9           65.2                8.5 +/-    0.37       9.2 +/-    0.37  0.050 / 0.040
G08     43.8           28.7                6.0 +/-    0.82      10.8 +/-    0.82  0.040 / 0.070
G09     175.5          22.0                9.2 +/-    0.60      19.4 +/-    0.60  0.040 / 0.060
G11     102.6          40.9                9.5 +/-    1.40      13.6 +/-    1.40  0.080 / 0.170
G13     316.3          21.6                4.8 +/-    2.03      10.2 +/-    2.03  0.090 / 0.150
G17     202.3          27.1                8.1 +/-    0.97      15.0 +/-    0.97  0.030 / 0.040
G18     91.2           21.8                9.2 +/-    0.93      19.5 +/-    0.93  0.030 / 0.040
G28     297.4          58.3                6.5 +/-    1.24       7.4 +/-    1.24  0.050 / 0.070
G30     349.7          70.3                6.4 +/-    1.01       6.7 +/-    1.01  0.040 / 0.090