PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-17:27:50
G01     112.9          22.2               19.1 +/-    1.21      39.8 +/-    1.21  0.070 / 0.080
G07     95.8           62.9               17.3 +/-    0.55      19.1 +/-    0.55  0.070 / 0.080
G08     43.2           27.1               13.7 +/-    1.30      25.5 +/-    1.30  0.030 / 0.030
G09     175.9          19.0               18.8 +/-    0.88      42.3 +/-    0.88  0.040 / 0.040
G11     98.3           42.2               18.6 +/-    0.84      26.1 +/-    0.84  0.030 / 0.020
G13     313.9          24.5               16.4 +/-    2.24      32.3 +/-    2.24  0.030 / 0.030
G17     204.4          29.3               20.1 +/-    1.65      35.7 +/-    1.65  0.040 / 0.080
G18     87.2           23.1               14.5 +/-    0.68      29.6 +/-    0.68  0.040 / 0.080
G28     306.2          59.7               17.2 +/-    0.96      19.6 +/-    0.96  0.080 / 0.100
G30     3.8            74.5               17.1 +/-    0.91      17.6 +/-    0.91  0.070 / 0.100