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               16.5 +/-    1.84      34.3 +/-    1.84  0.150 / 0.120
G07     95.8           62.9               16.6 +/-    0.55      18.4 +/-    0.55  0.060 / 0.120
G08     43.2           27.1               11.1 +/-    1.58      20.7 +/-    1.58  0.030 / 0.030
G09     175.9          19.0               17.4 +/-    1.84      39.2 +/-    1.84  0.030 / 0.040
G11     98.3           42.2               16.7 +/-    0.64      23.5 +/-    0.64  0.020 / 0.020
G13     313.9          24.5               14.4 +/-    1.13      28.5 +/-    1.13  0.020 / 0.030
G17     204.4          29.3               20.7 +/-    2.92      36.9 +/-    2.92  0.100 / 0.160
G18     87.2           23.1               14.2 +/-    1.02      29.0 +/-    1.02  0.110 / 0.190
G28     306.2          59.7               15.3 +/-    0.86      17.4 +/-    0.86  0.090 / 0.150
G30     3.8            74.5               16.2 +/-    0.61      16.8 +/-    0.61  0.090 / 0.140