PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-21:12:50
G01     117.9          18.9               13.1 +/-    1.77      29.6 +/-    1.77  0.250 / 0.120
G07     83.3           66.2               12.1 +/-    0.65      13.1 +/-    0.65  0.060 / 0.060
G08     45.7           34.4               10.3 +/-    0.94      16.5 +/-    0.94  0.290 / 0.250
G09     177.4          25.3               15.4 +/-    1.51      29.8 +/-    1.51  0.150 / 0.200
G11     107.9          40.5               13.7 +/-    0.87      19.8 +/-    0.87  0.400 / 0.360
G13     317.2          20.1               10.2 +/-    1.89      22.4 +/-    1.89  0.120 / 0.270
G17     203.2          22.6               17.0 +/-    1.92      35.0 +/-    1.92  0.070 / 0.040
G18     93.4           21.4               11.6 +/-    1.71      24.8 +/-    1.71  0.030 / 0.030
G28     296.3          58.2               11.9 +/-    0.97      13.7 +/-    0.97  0.060 / 0.090
G30     356.1          71.4               11.8 +/-    0.62      12.4 +/-    0.62  0.070 / 0.050